As a leading manufacturer and supplier of chemicals in China, DayangChem not only supply popular chemicals, but also DayangChem's R&D center offer custom synthesis services. DayangChem can provide different quantities of custom synthesis ch
Cas:57333-96-7
Min.Order:1 Kilogram
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Type:Lab/Research institutions
inquiryShanghai Seasonsgreen Chemical is a high-tech research and development, production, sale and custom synthesis set in one high-tech chemical products enterprises. Our sales and marketing division is located in Shanghai, serving international pharmaceu
Cas:57333-96-7
Min.Order:1 Kilogram
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inquiryOur main production base is located in Xuzhou industry park. We are certified both to the ISO 9001 and ISO 14001 Standards, have a safety management system in place.Our R&D team masters core technology for process-design of target building block
WITH US,YOUR MONEY IN SAFE,YOUR BUSINESS IN SAFE 1)Quick Response Within 12 hours; 2)Quality Guarantee: All products are strictly tested by our QC, confirmed by QA and approved by third party lab in China, USA, Canada, Germany, UK, Italy, France et
Cas:57333-96-7
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FOB Price: $139.0 / 210.0
Type:Trading Company
inquiry1.In No Less 10 years exporting experience. you can 100% received goods 2.Lower Price with higher quality 3,Free sample 4,We are sincerely responsible for the "product quality" and "After Service" Upbio is Specializ
Beluga chemical professional supply High quality Tacalcitol manufaacturer 1. Beluga Chemical has a professional RESEARCH and development team and strong technical force to ensure technical support and research capabilities. 2. Made in China and e
Cas:57333-96-7
Min.Order:1 Gram
Negotiable
Type:Lab/Research institutions
inquiryHello, dear friend! I'm Hansen and Allen from China. Welcome to my lookchem mall! The following is a brief introduction of our company's products and services. If you are interested in our products, please contact us by emai
We can provide GMP validation service that complies with SFDA, FDA, WHO and EU EMPA.Excellent registration team could help us easlily to register our products in different countries.If you and your customer are interested in some products or need C
Cas:57333-96-7
Min.Order:1 Gram
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Type:Trading Company
inquiryHenan Wentao Chemical Product Co.,Ltd is Located in Zhengzhou High-tech Development Zone with import and export license, We passed ISO 9001:2008 as well, Henan Wentao has developed more than 1000 compounds, which are widely used in the fields of prod
Why is SINOWAY: 1) Specialized in pharmaceutical and healthcare industrial for 34 years. 2) ISO 9001:2015 & SGS audited supplier . 3) Accept various payment terms : T.T 30-60 days. 4) We have warehouse in USA with quickly shipment . 5) We c
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inquiryFactory direct sales, accept customization. Tacalcitol, the second vitamin D analog developed as a topical antipsoriatic, was introduced for keratosis, psoriasis, ichthyosis, pityriasis rubra pilaris and palmoplantar pustulosis and keratoderma. It s
Company Introduction 1. Established in 2005, with two independent business divisions: Fine chemicals division; Pharmaceutical division. 2. Main product: Optical brightener Textile auxiliary Dye stuff Pigments
J&H CHEM R&D center can offer custom synthesis according to the contract research and development services for the fine chemicals, pharmaceutical, biotechnique and some of the other chemicals. J&H CHEM has some Manufacturing base in Jia
Zibo Hangyu Biotechnology Development Co., Ltd is a leading manufacturer and supplier of chemicals in China. We develop produce and distribute high quality pharmaceuticals, intermediates, special chemicals and OLED intermediates and other fine chemi
High Quality Tacalcitol 98% 57333-96-7 in stock fast delivery good supplierAppearance:Powder Storage:Dry and ventilated Package:according to customers' requirements Application:APIs Transportation:By air(EMS or EUB or FedEx or TNT ect...) or by sea(F
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inquiryChemvon Biotechnology is one of the leading high-technology manufacturer in the field of pharmaceutical and fine chemical industry. From origins as a research group in technology service, chemvon has progressed into an integrated company with a k
Product name: Tacalcitol CAS No.:57333-96-7 Molecule Formula:C27H44O3 Molecule Weight:416.64 Purity: 99.0% Package: 25kg/drum Description:White powder Manufacture Standards:Enterprise Standard TESTING ITEMS SPECIF
Cas:57333-96-7
Min.Order:1 Kilogram
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Type:Lab/Research institutions
inquiryOur company was built in 2009 with an ISO certificate.In the past 6 years, we have grown up as a famous fine chemicals supplier in China and we had established stable business relationships with Samsung,LG,Merck,Thermo Fisher Scientific and so
Cas:57333-96-7
Min.Order:1 Metric Ton
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Type:Lab/Research institutions
inquiryProduct Details Grade: pharmaceutical grade Purity:99%+ ProductionCapacity: 1000 Kilogram/Month Scope of use: For scientific research only(The product must be used legally) Our Advantage 1. Best quality with competitive price. 2. Quick shipping,
GMP standard, high purity, competitive price, in stock 1. Quick Response: within 6 hours after receiving your email. 2. Quality Guarantee: All products are strictly tested by our QC, confirmed by QA, and approved by a third-party lab in China, USA,
Shandong Mopai Biotechnology Co., LTD is a leading manufacturer and supplier of chemicals in China. We develop produce and distribute high quality pharmaceuticals, intermediates, special chemicals and OLED intermediates and other fine chemicals. W
1.Applied in food field.it can improve the immune system and prolong life. 2.Appliedin cosmetic field.it can improve the skin care. 3.Applied in pharmaceutical field.it can treat various dieases. 4.Our product quality assurance will make our customer
Cas:57333-96-7
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inquiryAppearance:95%+ Package:R&D,Pilot run Transportation:per client require Port:Express ,Air, Sea
We are a Union of chemistry in China, consists of chemists,engineers, laboratories,factories in China. We organize surplus capacity of R&D and production as well as custom synthesis for chemical products and chemical business project. We are supp
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Type:Trading Company
inquiryLower price, sample is available,SDS test documents are available,large stock in warehouseAppearance:White powder Storage:Sealed and preserved Package:200/Kilograms Application:Fine chemical intermediates, used as the main raw material for the synthe
Stable stock and competitive priceAppearance:powder Storage:available Package:1KG 5KG 25KG Application:As Pharm raw material Transportation:By Courier,Sea or air
Acmec is a leading manufacturer and supplier of biochemical reagents and life science products. We have over 40,000 items in stock (real-time inventory) and offer discounted prices to registered members of the online store ( www.acmec.com.cn ) Appea
Cas:57333-96-7
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Type:Lab/Research institutions
inquiryhigh quality Storage:Sealed, dry, microtherm , avoid light and smell. Package:According to the demand of customer Application:Organic synthesis Transportation:by air or by sea
★.Best quality according to requirement ★.Competitive price in China market ★.Mature Technical support ★.Professional logistic support
tacalcitol
Conditions | Yield |
---|---|
With tetrabutyl ammonium fluoride In tetrahydrofuran at 20℃; Darkness; | 98% |
With tetrabutyl ammonium fluoride In tetrahydrofuran at 20℃; for 40h; Darkness; | 98% |
tacalcitol
Conditions | Yield |
---|---|
With hydrogen fluoride In water; acetonitrile at 20℃; for 24h; | 76% |
With methanol; AG 50W-X4 resin at 20℃; methanolysis; | 33 mg |
tacalcitol
Conditions | Yield |
---|---|
Stage #1: C41H74O4Si2 With potassium carbonate In methanol at 20℃; for 5h; Stage #2: With tetrabutyl ammonium fluoride In tetrahydrofuran for 2h; Reflux; | 75% |
tacalcitol
Conditions | Yield |
---|---|
Stage #1: C46H76O4Si2 With potassium carbonate In methanol at 20℃; for 5h; Stage #2: With tetrabutyl ammonium fluoride In tetrahydrofuran for 2h; Reflux; | 75% |
tacalcitol
Conditions | Yield |
---|---|
With (1S)-10-camphorsulfonic acid In methanol; chloroform at 20℃; for 2.5h; | 65% |
Stage #1: C39H72O3Si2 With tetrabutyl ammonium fluoride In tetrahydrofuran at 50 - 55℃; for 2h; Stage #2: With maleic anhydride In ethyl acetate at 30 - 35℃; for 24h; | 300 mg |
1α,3β,24(R)-trihydroxycholesta-5,7-diene
tacalcitol
Conditions | Yield |
---|---|
In diethyl ether Irradiation; |
(S)-2-((3R,3aR,7S,7aR)-octahydro-7-hydroxy-3a-methyl-1H-inden-3-yl)propyl 4-methylbenzenesulfonate
tacalcitol
Conditions | Yield |
---|---|
Multi-step reaction with 13 steps 1.1: 91 percent / dimethylsulfoxide / 2 h / 90 °C 2.1: 98 percent / imidazole / dimethylformamide / 12 h / 80 °C 3.1: lithium diisopropylamide / tetrahydrofuran; hexane / 1 h / -78 - 0 °C 3.2: 91 percent / hexamethylphosphoramide / tetrahydrofuran; hexane / 7 h / -60 - 20 °C 4.1: 94 percent / tert-butanol; potassium; hexamethylphosphoramide / diethyl ether / 13 h / 0 - 20 °C 5.1: 93 percent / N,N-diisopropylethylamine / CH2Cl2 / 0 - 20 °C 6.1: 97 percent / tetrabutylammonium fluoride / tetrahydrofuran / 18 h / Heating 7.1: 96 percent / pyridinium dichromate; pyridinium p-toluenesulfonate / CH2Cl2 / 40 h / 0 °C 8.1: lithium diisopropylamide / hexane; tetrahydrofuran / 2 h / -78 - 20 °C 8.2: 76 percent / tetrahydrofuran; hexane / -78 - 20 °C 9.1: 92 percent / Et3N / bis-triphenylphosphine palladium dichloride / dimethylformamide / 2 h / 70 °C 10.1: 83 percent / hydrogen; quinoline / Lindlar catalyst / hexane / 0.5 h 11.1: 94 percent / 2,2,4-trimethyl-pentane / 4 h / Heating 12.1: tetrabutylammonium fluoride / tetrahydrofuran / 20 h / 20 °C 13.1: 33 mg / AG 50W-X4 resin; methanol / 20 °C View Scheme |
(8S,20S)-de-A,B-20-(hydroxymethyl)pregnan-8-ol
tacalcitol
Conditions | Yield |
---|---|
Multi-step reaction with 14 steps 1.1: 93 percent / pyridine / 12 h / 0 °C 2.1: 91 percent / dimethylsulfoxide / 2 h / 90 °C 3.1: 98 percent / imidazole / dimethylformamide / 12 h / 80 °C 4.1: lithium diisopropylamide / tetrahydrofuran; hexane / 1 h / -78 - 0 °C 4.2: 91 percent / hexamethylphosphoramide / tetrahydrofuran; hexane / 7 h / -60 - 20 °C 5.1: 94 percent / tert-butanol; potassium; hexamethylphosphoramide / diethyl ether / 13 h / 0 - 20 °C 6.1: 93 percent / N,N-diisopropylethylamine / CH2Cl2 / 0 - 20 °C 7.1: 97 percent / tetrabutylammonium fluoride / tetrahydrofuran / 18 h / Heating 8.1: 96 percent / pyridinium dichromate; pyridinium p-toluenesulfonate / CH2Cl2 / 40 h / 0 °C 9.1: lithium diisopropylamide / hexane; tetrahydrofuran / 2 h / -78 - 20 °C 9.2: 76 percent / tetrahydrofuran; hexane / -78 - 20 °C 10.1: 92 percent / Et3N / bis-triphenylphosphine palladium dichloride / dimethylformamide / 2 h / 70 °C 11.1: 83 percent / hydrogen; quinoline / Lindlar catalyst / hexane / 0.5 h 12.1: 94 percent / 2,2,4-trimethyl-pentane / 4 h / Heating 13.1: tetrabutylammonium fluoride / tetrahydrofuran / 20 h / 20 °C 14.1: 33 mg / AG 50W-X4 resin; methanol / 20 °C View Scheme | |
Multi-step reaction with 11 steps 1: 1H-imidazole; dmap / N,N-dimethyl-formamide / 96 h / 20 °C 2: tetrabutyl ammonium fluoride / tetrahydrofuran / 12 h / 20 °C 3: triphenylphosphine; di-isopropyl azodicarboxylate / tetrahydrofuran / 12 h / 0 - 20 °C 4: 3-chloro-benzenecarboperoxoic acid / dichloromethane / 12 h / 0 - 20 °C 5: lithium hexamethyldisilazane / tetrahydrofuran / 15 h / -78 - 20 °C 6: tetrabutyl ammonium fluoride / tetrahydrofuran / 17 h / 65 °C 7: hydrogen; palladium 10% on activated carbon / methanol / 15 h 8: dipyridinium dichromate / dichloromethane / 20 °C 9: n-butyllithium / tetrahydrofuran / 18 h / -78 °C 10: tetrabutyl ammonium fluoride / tetrahydrofuran / 20 °C / Darkness 11: hydrogen fluoride / acetonitrile; water / 24 h / 20 °C View Scheme | |
Multi-step reaction with 10 steps 1.1: 1H-imidazole / N,N-dimethyl-formamide / 50 - 55 °C 2.1: tetrabutyl ammonium fluoride / tetrahydrofuran / -5 - 5 °C 3.1: 2,2,6,6-Tetramethyl-1-piperidinyloxy free radical; potassium bromide; sodium hypochlorite; sodium hydrogencarbonate / dichloromethane; water / 0.17 h / -5 - 5 °C 4.1: sodium hexamethyldisilazane / tetrahydrofuran / 0.5 h / -70 - -60 °C 4.2: -70 - 20 °C 5.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 55 - 60 °C 6.1: pyridinium chlorochromate / dichloromethane / 20 °C 7.1: palladium 10% on activated carbon; hydrogen / tetrahydrofuran; methanol / 24 h / 2280.15 - 2660.18 Torr 8.1: 1H-imidazole / N,N-dimethyl-formamide / 2 h / 20 °C 9.1: n-butyllithium / tetrahydrofuran / 1 h / -70 - -60 °C 9.2: 1.5 h / -65 - -10 °C 10.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 20 °C / Darkness View Scheme | |
Multi-step reaction with 10 steps 1.1: 1H-imidazole; ammonium chloride / N,N-dimethyl-formamide / 50 - 55 °C / Inert atmosphere 2.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 2 h / 0 °C / Inert atmosphere 3.1: 2,2,6,6-Tetramethyl-1-piperidinyloxy free radical; [bis(acetoxy)iodo]benzene / dichloromethane / 4 h / 20 °C / Inert atmosphere 4.1: sodium hexamethyldisilazane / tetrahydrofuran / 0.5 h / -70 °C / Inert atmosphere 4.2: -70 - 20 °C / Inert atmosphere 5.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 60 °C / Inert atmosphere 6.1: dipyridinium dichromate / dichloromethane / 20 °C 7.1: palladium 10% on activated carbon; hydrogen / tetrahydrofuran; methanol / 24 h / 2280.15 - 2660.18 Torr 8.1: 1H-imidazole / N,N-dimethyl-formamide / 2 h / 20 °C / Inert atmosphere 9.1: n-butyllithium / tetrahydrofuran / 1 h / -65 °C / Inert atmosphere 9.2: 1.5 h / -65 - -10 °C / Inert atmosphere 10.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 40 h / 20 °C / Darkness View Scheme |
<1R-<1β(R*),3aα,4β,7aβ>>-octahydro-4-hydroxy-β,7a-dimethyl-1H-indene-1-propanenitrile
tacalcitol
Conditions | Yield |
---|---|
Multi-step reaction with 12 steps 1.1: 98 percent / imidazole / dimethylformamide / 12 h / 80 °C 2.1: lithium diisopropylamide / tetrahydrofuran; hexane / 1 h / -78 - 0 °C 2.2: 91 percent / hexamethylphosphoramide / tetrahydrofuran; hexane / 7 h / -60 - 20 °C 3.1: 94 percent / tert-butanol; potassium; hexamethylphosphoramide / diethyl ether / 13 h / 0 - 20 °C 4.1: 93 percent / N,N-diisopropylethylamine / CH2Cl2 / 0 - 20 °C 5.1: 97 percent / tetrabutylammonium fluoride / tetrahydrofuran / 18 h / Heating 6.1: 96 percent / pyridinium dichromate; pyridinium p-toluenesulfonate / CH2Cl2 / 40 h / 0 °C 7.1: lithium diisopropylamide / hexane; tetrahydrofuran / 2 h / -78 - 20 °C 7.2: 76 percent / tetrahydrofuran; hexane / -78 - 20 °C 8.1: 92 percent / Et3N / bis-triphenylphosphine palladium dichloride / dimethylformamide / 2 h / 70 °C 9.1: 83 percent / hydrogen; quinoline / Lindlar catalyst / hexane / 0.5 h 10.1: 94 percent / 2,2,4-trimethyl-pentane / 4 h / Heating 11.1: tetrabutylammonium fluoride / tetrahydrofuran / 20 h / 20 °C 12.1: 33 mg / AG 50W-X4 resin; methanol / 20 °C View Scheme |
De-A,B-(24R)-8β-[(tert-butyldimethylsilyl)oxy]-cholestan-24-ol
tacalcitol
Conditions | Yield |
---|---|
Multi-step reaction with 9 steps 1.1: 93 percent / N,N-diisopropylethylamine / CH2Cl2 / 0 - 20 °C 2.1: 97 percent / tetrabutylammonium fluoride / tetrahydrofuran / 18 h / Heating 3.1: 96 percent / pyridinium dichromate; pyridinium p-toluenesulfonate / CH2Cl2 / 40 h / 0 °C 4.1: lithium diisopropylamide / hexane; tetrahydrofuran / 2 h / -78 - 20 °C 4.2: 76 percent / tetrahydrofuran; hexane / -78 - 20 °C 5.1: 92 percent / Et3N / bis-triphenylphosphine palladium dichloride / dimethylformamide / 2 h / 70 °C 6.1: 83 percent / hydrogen; quinoline / Lindlar catalyst / hexane / 0.5 h 7.1: 94 percent / 2,2,4-trimethyl-pentane / 4 h / Heating 8.1: tetrabutylammonium fluoride / tetrahydrofuran / 20 h / 20 °C 9.1: 33 mg / AG 50W-X4 resin; methanol / 20 °C View Scheme |
(R)-3-((1R,3aR,4S,7aR)-4-((tert-butyldimethylsilyl)oxy)-7a-methyloctahydro-1H-inden-1-yl)butanenitrile
tacalcitol
Conditions | Yield |
---|---|
Multi-step reaction with 11 steps 1.1: lithium diisopropylamide / tetrahydrofuran; hexane / 1 h / -78 - 0 °C 1.2: 91 percent / hexamethylphosphoramide / tetrahydrofuran; hexane / 7 h / -60 - 20 °C 2.1: 94 percent / tert-butanol; potassium; hexamethylphosphoramide / diethyl ether / 13 h / 0 - 20 °C 3.1: 93 percent / N,N-diisopropylethylamine / CH2Cl2 / 0 - 20 °C 4.1: 97 percent / tetrabutylammonium fluoride / tetrahydrofuran / 18 h / Heating 5.1: 96 percent / pyridinium dichromate; pyridinium p-toluenesulfonate / CH2Cl2 / 40 h / 0 °C 6.1: lithium diisopropylamide / hexane; tetrahydrofuran / 2 h / -78 - 20 °C 6.2: 76 percent / tetrahydrofuran; hexane / -78 - 20 °C 7.1: 92 percent / Et3N / bis-triphenylphosphine palladium dichloride / dimethylformamide / 2 h / 70 °C 8.1: 83 percent / hydrogen; quinoline / Lindlar catalyst / hexane / 0.5 h 9.1: 94 percent / 2,2,4-trimethyl-pentane / 4 h / Heating 10.1: tetrabutylammonium fluoride / tetrahydrofuran / 20 h / 20 °C 11.1: 33 mg / AG 50W-X4 resin; methanol / 20 °C View Scheme |
De-A,B-(24R,22ξ)-8β-[(tert-butyldimethylsilyl)oxy]-24-hydroxy-cholestane-22-carbonitrile
tacalcitol
Conditions | Yield |
---|---|
Multi-step reaction with 10 steps 1.1: 94 percent / tert-butanol; potassium; hexamethylphosphoramide / diethyl ether / 13 h / 0 - 20 °C 2.1: 93 percent / N,N-diisopropylethylamine / CH2Cl2 / 0 - 20 °C 3.1: 97 percent / tetrabutylammonium fluoride / tetrahydrofuran / 18 h / Heating 4.1: 96 percent / pyridinium dichromate; pyridinium p-toluenesulfonate / CH2Cl2 / 40 h / 0 °C 5.1: lithium diisopropylamide / hexane; tetrahydrofuran / 2 h / -78 - 20 °C 5.2: 76 percent / tetrahydrofuran; hexane / -78 - 20 °C 6.1: 92 percent / Et3N / bis-triphenylphosphine palladium dichloride / dimethylformamide / 2 h / 70 °C 7.1: 83 percent / hydrogen; quinoline / Lindlar catalyst / hexane / 0.5 h 8.1: 94 percent / 2,2,4-trimethyl-pentane / 4 h / Heating 9.1: tetrabutylammonium fluoride / tetrahydrofuran / 20 h / 20 °C 10.1: 33 mg / AG 50W-X4 resin; methanol / 20 °C View Scheme |
De-A,B-(24R)-24-[(methoxymethyl)oxy]-cholestan-8-one
tacalcitol
Conditions | Yield |
---|---|
Multi-step reaction with 6 steps 1.1: lithium diisopropylamide / hexane; tetrahydrofuran / 2 h / -78 - 20 °C 1.2: 76 percent / tetrahydrofuran; hexane / -78 - 20 °C 2.1: 92 percent / Et3N / bis-triphenylphosphine palladium dichloride / dimethylformamide / 2 h / 70 °C 3.1: 83 percent / hydrogen; quinoline / Lindlar catalyst / hexane / 0.5 h 4.1: 94 percent / 2,2,4-trimethyl-pentane / 4 h / Heating 5.1: tetrabutylammonium fluoride / tetrahydrofuran / 20 h / 20 °C 6.1: 33 mg / AG 50W-X4 resin; methanol / 20 °C View Scheme | |
Multi-step reaction with 3 steps 1: n-butyllithium / tetrahydrofuran / 18 h / -78 °C 2: tetrabutyl ammonium fluoride / tetrahydrofuran / 20 °C / Darkness 3: hydrogen fluoride / acetonitrile; water / 24 h / 20 °C View Scheme |
De-A,B-(24R)-8β-hydroxy-cholestan-24-ol methoxymethyl ether
tacalcitol
Conditions | Yield |
---|---|
Multi-step reaction with 7 steps 1.1: 96 percent / pyridinium dichromate; pyridinium p-toluenesulfonate / CH2Cl2 / 40 h / 0 °C 2.1: lithium diisopropylamide / hexane; tetrahydrofuran / 2 h / -78 - 20 °C 2.2: 76 percent / tetrahydrofuran; hexane / -78 - 20 °C 3.1: 92 percent / Et3N / bis-triphenylphosphine palladium dichloride / dimethylformamide / 2 h / 70 °C 4.1: 83 percent / hydrogen; quinoline / Lindlar catalyst / hexane / 0.5 h 5.1: 94 percent / 2,2,4-trimethyl-pentane / 4 h / Heating 6.1: tetrabutylammonium fluoride / tetrahydrofuran / 20 h / 20 °C 7.1: 33 mg / AG 50W-X4 resin; methanol / 20 °C View Scheme | |
Multi-step reaction with 4 steps 1: dipyridinium dichromate / dichloromethane / 20 °C 2: n-butyllithium / tetrahydrofuran / 18 h / -78 °C 3: tetrabutyl ammonium fluoride / tetrahydrofuran / 20 °C / Darkness 4: hydrogen fluoride / acetonitrile; water / 24 h / 20 °C View Scheme |
De-A,B-(24R)-24-[(methoxymethyl)oxy]-cholest-8-en-8-yl trifluoromethanesulfonate
tacalcitol
Conditions | Yield |
---|---|
Multi-step reaction with 5 steps 1: 92 percent / Et3N / bis-triphenylphosphine palladium dichloride / dimethylformamide / 2 h / 70 °C 2: 83 percent / hydrogen; quinoline / Lindlar catalyst / hexane / 0.5 h 3: 94 percent / 2,2,4-trimethyl-pentane / 4 h / Heating 4: tetrabutylammonium fluoride / tetrahydrofuran / 20 h / 20 °C 5: 33 mg / AG 50W-X4 resin; methanol / 20 °C View Scheme |
De-A,B-(24R)-8β-[(tert-butyldimethylsilyl)oxy]-cholestan-24-ol methoxymethyl ether
tacalcitol
Conditions | Yield |
---|---|
Multi-step reaction with 8 steps 1.1: 97 percent / tetrabutylammonium fluoride / tetrahydrofuran / 18 h / Heating 2.1: 96 percent / pyridinium dichromate; pyridinium p-toluenesulfonate / CH2Cl2 / 40 h / 0 °C 3.1: lithium diisopropylamide / hexane; tetrahydrofuran / 2 h / -78 - 20 °C 3.2: 76 percent / tetrahydrofuran; hexane / -78 - 20 °C 4.1: 92 percent / Et3N / bis-triphenylphosphine palladium dichloride / dimethylformamide / 2 h / 70 °C 5.1: 83 percent / hydrogen; quinoline / Lindlar catalyst / hexane / 0.5 h 6.1: 94 percent / 2,2,4-trimethyl-pentane / 4 h / Heating 7.1: tetrabutylammonium fluoride / tetrahydrofuran / 20 h / 20 °C 8.1: 33 mg / AG 50W-X4 resin; methanol / 20 °C View Scheme |
(24R)-1α-[(tert-butyldimethylsilyl)oxy]-6,7-didehydro-24-[(methoxymethyl)oxy]-previtamin D3 tert-butyldimethylsilyl ether
tacalcitol
Conditions | Yield |
---|---|
Multi-step reaction with 4 steps 1: 83 percent / hydrogen; quinoline / Lindlar catalyst / hexane / 0.5 h 2: 94 percent / 2,2,4-trimethyl-pentane / 4 h / Heating 3: tetrabutylammonium fluoride / tetrahydrofuran / 20 h / 20 °C 4: 33 mg / AG 50W-X4 resin; methanol / 20 °C View Scheme |
1α-[(tert-butyldimethylsilyl)oxy]-24R-[(methoxymethyl)oxy]-previtamin D3 tert-butyldimethylsilyl ether
tacalcitol
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: 94 percent / 2,2,4-trimethyl-pentane / 4 h / Heating 2: tetrabutylammonium fluoride / tetrahydrofuran / 20 h / 20 °C 3: 33 mg / AG 50W-X4 resin; methanol / 20 °C View Scheme |
1α-[(tert-butyldimethylsilyl)oxy]-24R-[(methoxymethyl)oxy]-vitamin D3 tert-butyldimethylsilyl ether
tacalcitol
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: tetrabutylammonium fluoride / tetrahydrofuran / 20 h / 20 °C 2: 33 mg / AG 50W-X4 resin; methanol / 20 °C View Scheme | |
Multi-step reaction with 2 steps 1: tetrabutyl ammonium fluoride / tetrahydrofuran / 20 °C / Darkness 2: hydrogen fluoride / acetonitrile; water / 24 h / 20 °C View Scheme |
1α, 3β, 24-trihydroxycholest-5-ene
tacalcitol
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: Py 3: diethyl ether / Irradiation View Scheme |
1α, 2α-epoxy-24-keto-cholesta-4,6-dien-3-one
tacalcitol
Conditions | Yield |
---|---|
Multi-step reaction with 4 steps 1: Li, NH4Cl, liq. NH3 2: Py 4: diethyl ether / Irradiation View Scheme |
1α-Hydroxy-3β,24(R)-dibenzoyloxy-cholest-5-ene
tacalcitol
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 2: diethyl ether / Irradiation View Scheme |
tacalcitol
Conditions | Yield |
---|---|
Multi-step reaction with 6 steps 1.1: dichloromethane / 4 h / 0 - 20 °C / Inert atmosphere 2.1: palladium on activated charcoal; hydrogen / methanol / 760.05 Torr 3.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 10 h / Reflux 4.1: pyridinium dichromate; aluminum oxide / dichloromethane / 20 h / 20 °C 5.1: n-butyllithium / tetrahydrofuran / 0.5 h / -60 °C / Inert atmosphere 5.2: 2 h / 20 °C 6.1: potassium carbonate / methanol / 5 h / 20 °C 6.2: 2 h / Reflux View Scheme |
tacalcitol
Conditions | Yield |
---|---|
Multi-step reaction with 6 steps 1.1: pyridine / dichloromethane / 5 h / 0 - 20 °C / Inert atmosphere 2.1: palladium on activated charcoal; hydrogen / methanol / 760.05 Torr 3.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 10 h / Reflux 4.1: pyridinium dichromate / dichloromethane / 20 h / 20 °C / Inert atmosphere 5.1: n-butyllithium / tetrahydrofuran / 0.5 h / -60 °C / Inert atmosphere 5.2: 2 h / 20 °C 6.1: potassium carbonate / methanol / 5 h / 20 °C 6.2: 2 h / Reflux View Scheme |
tacalcitol
Conditions | Yield |
---|---|
Multi-step reaction with 5 steps 1.1: palladium on activated charcoal; hydrogen / methanol / 760.05 Torr 2.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 10 h / Reflux 3.1: pyridinium dichromate; aluminum oxide / dichloromethane / 20 h / 20 °C 4.1: n-butyllithium / tetrahydrofuran / 0.5 h / -60 °C / Inert atmosphere 4.2: 2 h / 20 °C 5.1: potassium carbonate / methanol / 5 h / 20 °C 5.2: 2 h / Reflux View Scheme |
tacalcitol
Conditions | Yield |
---|---|
Multi-step reaction with 5 steps 1.1: palladium on activated charcoal; hydrogen / methanol / 760.05 Torr 2.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 10 h / Reflux 3.1: pyridinium dichromate / dichloromethane / 20 h / 20 °C / Inert atmosphere 4.1: n-butyllithium / tetrahydrofuran / 0.5 h / -60 °C / Inert atmosphere 4.2: 2 h / 20 °C 5.1: potassium carbonate / methanol / 5 h / 20 °C 5.2: 2 h / Reflux View Scheme |
tacalcitol
Conditions | Yield |
---|---|
Multi-step reaction with 4 steps 1.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 10 h / Reflux 2.1: pyridinium dichromate; aluminum oxide / dichloromethane / 20 h / 20 °C 3.1: n-butyllithium / tetrahydrofuran / 0.5 h / -60 °C / Inert atmosphere 3.2: 2 h / 20 °C 4.1: potassium carbonate / methanol / 5 h / 20 °C 4.2: 2 h / Reflux View Scheme |
tacalcitol
Conditions | Yield |
---|---|
Multi-step reaction with 4 steps 1.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 10 h / Reflux 2.1: pyridinium dichromate / dichloromethane / 20 h / 20 °C / Inert atmosphere 3.1: n-butyllithium / tetrahydrofuran / 0.5 h / -60 °C / Inert atmosphere 3.2: 2 h / 20 °C 4.1: potassium carbonate / methanol / 5 h / 20 °C 4.2: 2 h / Reflux View Scheme |
tacalcitol
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1.1: pyridinium dichromate; aluminum oxide / dichloromethane / 20 h / 20 °C 2.1: n-butyllithium / tetrahydrofuran / 0.5 h / -60 °C / Inert atmosphere 2.2: 2 h / 20 °C 3.1: potassium carbonate / methanol / 5 h / 20 °C 3.2: 2 h / Reflux View Scheme |
tacalcitol
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1.1: pyridinium dichromate / dichloromethane / 20 h / 20 °C / Inert atmosphere 2.1: n-butyllithium / tetrahydrofuran / 0.5 h / -60 °C / Inert atmosphere 2.2: 2 h / 20 °C 3.1: potassium carbonate / methanol / 5 h / 20 °C 3.2: 2 h / Reflux View Scheme |
tacalcitol
Conditions | Yield |
---|---|
With oxygen; rose bengal In ethanol for 1h; Irradiation; Yield given; |
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