Dayangchem's 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. DayangChem can provide different quantities
Cas:110-62-3
Min.Order:1 Kilogram
FOB Price: $3.0
Type:Lab/Research institutions
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Cas:110-62-3
Min.Order:1 Kilogram
Negotiable
Type:Manufacturers
inquiryThe above product is Ality Chemical's strong item with best price, good quality and fast supply. Ality Chemical has been focusing on the research and production of this field for over 14 years. At the same time, we are always committed to providi
Our 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
Valeraldehyde; 1-butanecarbaldehyde;1-pentanal;aldehydevalerique;Butyl formal;butylformal;femanumber3098.;n-C4H9CHO;n-Valeraldehyd Valeraldehyde properties Melting point -92 ° C Boiling point 103 ° C Density 0.81 g / mL at 25 °
Chemical Name:N-pentanal (valeraldehyde) Synonyms:Pentanal CAS Number:110-62-3 Molecular Formula:CH3(CH2)3CHO Molecular Weight:86.13 EC Number:203-784-4 Appearance: Colorless liquid Storage:Preserve in well-closed, light-resistant
Cas:110-62-3
Min.Order:5 Metric Ton
FOB Price: $1.0 / 2.0
Type:Other
inquiryOur Services 1. New Molecules R&D 2. Own test center HPLC NMR GC LC-MS 3. API and Intermediates from China reputed manufacturers 4. Documents support COA MOA MSDS DMF open part Our advantages 1. Government awarded company. Top 100 enter
Hangzhou KeyingChem Co., Ltd. exported this product to many countries and regions at best price. If you are looking for the material’s manufacturer or supplier in China, KeyingChem is your best choice. Pls contact with us freely for getting det
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
Cas:110-62-3
Min.Order:10 Gram
FOB Price: $100.0
Type:Lab/Research institutions
inquiryWe are leading fine chemicals supplier in China and we had established stable business relationships with Samsung,LG,Merck,Thermo Fisher Scientific and so on.Our main business covers the fields below: 1.Noble Metal Catalysts (Pt.Pd...)
Cas:110-62-3
Min.Order:1 Kilogram
FOB Price: $5.0
Type:Lab/Research institutions
inquiryAppearance:95%+ Package:R&D,Pilot run Transportation:per client require Port:Express ,Air, Sea
Other name Valeral; Valeric aldehyde best quality competitive price PropertiesDensity0.807Melting point-92 ºCBoiling point10…
high purity lowest priceAppearance:solid or liquid Storage:in sealed air resistant place Package:drum and bag Application:for pharma use Transportation:by sea or air Port:Beijing or Guangzhou
high 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
Our clients, like BASF,CHEMO,Brenntag,ASR,Evonik,Merck and etc.Appearance:COA Storage:in stock Application:MSDS/TDS
Product Description Description & Specification Category Pharmaceutical Raw Materials, Fine Chemicals, Bulk drug Standard Medical standard
Cas:110-62-3
Min.Order:1 Kilogram
FOB Price: $112.0
Type:Trading Company
inquiryAnsciep Chemical is a professional enterprise manufacturing and distributing fine chemicals and speciality chemicals. We have been dedicated to heterocycle compounds and phenyl rings for tens of years. This is our mature product for export. Our quali
Amoychem is committed to providing the top-quality chemical products and services Internationally. We offer our customers with friendly, professional service and reliable, high performance products that have been manufactured according to the accredi
high purity lowest priceAppearance:solid or liquid Storage:in sealed air resistant place Package:Foil bag; Drum; Plastic bottle Application:Pharma;Industry;Agricultural Transportation:by sea or air Port:any port in China
Valeraldehyde Basic information Product Name: Valeraldehyde Synonyms: 1-butanecarbaldehyde;1-pentanal;aldehydevalerique;Butyl formal;butylformal;femanumber3098.;n-C
Cas:110-62-3
Min.Order:10 Gram
Negotiable
Type:Trading Company
inquiryChangzhou Extraordinary Pharmatech co., LTD. As a leading chemical manufacturer and supplier in China.DAS authentication is passed.We can provide the popular precursor chemicals, we have our own strong R & D team, have our own laboratories and fa
We have strong R&D center which can support and provide custom synthesis accordingly such as fine chemicals,biotechnique , pharmaceuticals etc.We can provide free sample for our clients to test anf verify the quality of our goods.LongyuChem holds str
HDZHL Co., LTD. specializing in the production of research and development of pharmaceutical intermediates with high quality price concessions, welcomed the new and old customers advisory purchase, companies invest large fund and brain research f
BaiFuChem is a Professional chemical raw material supplier in China, our main products include Biochemical , Pharma Intermediate and Organic chemical etc. BaiFuChem have wealth of products,experience , expertise and state-of-the-art
Hangzhou KieRaychem Co.,Ltd.is located in Yuhang District of Hangzhou City and specialized in the chemical product customization, development, sales, import and export. Current business is focused on fine chemicals, pharmaceutical materials and int
sub/micron to mesh powders (near/spheres, whiskers, flake, fiber, porous) and grain/ball, thin/ thick metal / alloys pieces / parts, thin and thick (particle) film materials /target, and custom-made crystals, substrates/parts. In the industries and a
U-CHEMO is a high-tech enterprise taking pharmaceutical intermediates and fine chemicals as main products. We pay high attention on product quality and apply quality management in the whole manufacturing process from research to production. In additi
Conditions | Yield |
---|---|
With oxidase In water at 40℃; Reformatsky Reaction; Enzymatic reaction; | 100% |
With dihydrogen peroxide In water at 65℃; for 4h; Catalytic behavior; Green chemistry; chemoselective reaction; | 97% |
With chromium(VI) oxide; silica gel for 0.05h; microwave irradiation; | 96% |
1,1-diacetoxypentane
pentanal
Conditions | Yield |
---|---|
With poly(4-vinylpyridine)-supported sulfuric acid In acetonitrile at 20℃; for 1.5h; Green chemistry; | 100% |
With ammonium cerium(IV) nitrate In acetonitrile at 70℃; for 4.5h; | 90% |
With N-sulfonic acid poly(4-vinylpyridinium) chloride In methanol at 20℃; for 0.666667h; | 88% |
With sulfonated rice husk ash In acetonitrile at 60℃; for 0.0833333h; | 88% |
Conditions | Yield |
---|---|
With dicarbonylacetylacetonato rhodium (I); C41H30O8P2; hydrogen In toluene at 90℃; under 3750.38 - 7500.75 Torr; for 3h; Reagent/catalyst; regioselective reaction; | 98.2% |
With [bmim][n-C8H17OSO3]; hydrogen; 2,7-bis(SO3Na)-4,5-bis(PPh2)-9,9-Me2-xanthene Rh complex at 120℃; under 7950.8 Torr; for 0.00472222h; Kinetics; Activation energy; Further Variations:; Pressures; Temperatures; syngas composition, educt conc., catalyst conc.; | 97.7% |
With (acetylacetonato)dicarbonylrhodium (l); C43H53O8P; hydrogen In toluene under 37503.8 Torr; for 12h; Catalytic behavior; Reagent/catalyst; regioselective reaction; | 97.4% |
Conditions | Yield |
---|---|
With (acetylacetonato)dicarbonylrhodium (l); 1,2,4,5-tetraisopropylbenzene; C43H53O8P; hydrogen In toluene under 37503.8 Torr; for 12h; Catalytic behavior; Pressure; regioselective reaction; | 96.5% |
With acetylacetonatodicarbonylrhodium(l); 3,3'-di-tert-butyl-5,5'-dimethoxy-[1,1'-biphenyl]-2,2'-diyltetrakis(2,4-dimethylphenyl)bis(phosphite); bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate; hydrogen In toluene at 120℃; under 15001.5 Torr; for 12h; Catalytic behavior; Reagent/catalyst; Autoclave; | 95% |
With dicarbonylacetylacetonato rhodium (I); trans-1,12-bis((di(1H-pyrrol-1-yl)phosphino)oxy)-5,5a,6,7,7a,8-hexahydrocyclopenta[1,2-b:1,5-b']dichromene; hydrogen In toluene at 110℃; under 3750.38 - 7500.75 Torr; for 15h; Glovebox; Autoclave; regioselective reaction; |
1-pentyl(trimethylsilyl)ether
pentanal
Conditions | Yield |
---|---|
With 1,4-dichloro-1,4-diazoniabicyclo[2,2,2]octane bis-chloride In water at 50℃; for 0.333333h; pH=7; | 95% |
With (H2DABCO)2(HDABCO)2(Br)2(Br3)4 In water at 80℃; for 0.333333h; | 95% |
With ammonium cerium(IV) nitrate; HZSM-5 zeolite In water for 0.0833333h; microwave irradiation; | 92% |
Conditions | Yield |
---|---|
[CpRu(η2-P,N-L)(CH3CN)]PF6 In [(2)H6]acetone; [(Me3Si)4C] at 70℃; for 5h; Product distribution / selectivity; | 95% |
C21H29N3PRu(1+)*F6P(1-) In dichloromethane; [(Me3Si)4C] at 20℃; for 24 - 48h; Product distribution / selectivity; | 95% |
{CpRu[P(i-Pr)2(1-Me-4-tBu-imidazol-2-yl)]MeCN}*PF6 In acetone at 70℃; for 1h; | 95 % Spectr. |
[CpRu(PN)(MeCN)]PF6 In [(2)H6]acetone at 70℃; for 1 - 5h; Product distribution / selectivity; | > 95 %Spectr. |
{bis(triphenylphosphine)nitrogen}{HW(CO)5}
n-valeryl chloride
A
pentanal
B
bis(triphenylphosphoranylidene)ammonium chloropentacarbonyltungstate
Conditions | Yield |
---|---|
In tetrahydrofuran 1:1 molar ratio, THF, 25.degree,C;; detected by NMR, Ir spectra and GC analysis;; | A 95% B n/a |
{PPN}{HCr(CO)5}
n-valeryl chloride
A
pentanal
B
bis(triphenylphosphine)nitrogen{Cr(CO)5Cl}
Conditions | Yield |
---|---|
In tetrahydrofuran 1:1 molar ratio, THF, 25°C;; detected by NMR and IR spectra; and GC analysis,; | A 95% B n/a |
Conditions | Yield |
---|---|
With dimethyl sulfoxide for 0.0361111h; Kornblum oxidation; Microwave irradiation; | 95% |
Conditions | Yield |
---|---|
With N-iodo-succinimide In chlorobenzene for 2h; Irradiation; | A 94% B 1% C n/a |
With N-iodo-succinimide In chlorobenzene for 2h; Product distribution; Irradiation; var. irradiat. times, temps. and light cond.; | A 94% B 1% C n/a |
Valeraldehyde N,N-dimethylhydrazone
pentanal
Conditions | Yield |
---|---|
With iron(II) sulfate In chloroform at 20℃; for 0.5h; Hydrolysis; | 94% |
With triethylene diamine nickel thiosulfate; water In chloroform at 20℃; for 0.0833333h; Hydrolysis; | 94% |
With 3-benzyl-5-(2-hydroxyethyl)-4-methyl-1,3-thiazol-3-ium chloride In chloroform at 20℃; for 1h; oxidative cleavage; | 90% |
valeraldehyde tosylhydrazone
pentanal
Conditions | Yield |
---|---|
With benzeneseleninic anhydride In tetrahydrofuran for 0.5h; Ambient temperature; | 92% |
Conditions | Yield |
---|---|
With iron(II) sulfate In chloroform at 20℃; for 0.666667h; Hydrolysis; | 92% |
Conditions | Yield |
---|---|
With tert-butylhypochlorite; lead acetate; dibenzoyl peroxide In toluene at 20℃; for 0.75h; | 92% |
With C21H12Cl6NO4V; oxygen In toluene at 100℃; for 1h; | |
With cerium(III) chloride heptahydrate; tetrabutyl-ammonium chloride In [D3]acetonitrile at 20℃; for 18h; Molecular sieve; Sealed tube; Irradiation; | 79 %Spectr. |
pentanal semicarbazone
pentanal
Conditions | Yield |
---|---|
With (H2DABCO)2(HDABCO)2(Br)2(Br3)4 In water at 80℃; for 0.25h; | 92% |
Conditions | Yield |
---|---|
With boron trifluoride diethyl etherate In diethyl ether for 4h; Ambient temperature; | 91% |
rac-2-hydroxyhexanoic acid
pentanal
Conditions | Yield |
---|---|
With tetrabutylammonium periodite In chloroform for 3h; Heating; | 90% |
With permanganate(VII) ion |
Conditions | Yield |
---|---|
With 2,2,6,6-tetramethyl-piperidine-N-oxyl; sodium acetate; 4,7-di-(NaSO3Ph)-[1.10]phenanthroline-Pd(OAc)2 In water at 100℃; under 22502.3 Torr; for 15h; pH=6.5 - 11.5; | A 90% B n/a |
With 2O34W9Zn(12-)*W(6+)*3Zn(2+)*2H2O; dihydrogen peroxide In water; acetonitrile at 135℃; under 2250.23 Torr; for 0.25h; Microwave irradiation; | A n/a B 75% |
With [γ-W10SiO36(PhPO)2][TBA]4; dihydrogen peroxide In acetonitrile at 90 - 120℃; for 0.833333h; microwave irradiation; | A 59% B n/a |
2-butyl-1,3-dithiolane
pentanal
Conditions | Yield |
---|---|
With selenium(IV) oxide In acetic acid for 1.66667h; Ambient temperature; | 90% |
valeraldoxime
pentanal
Conditions | Yield |
---|---|
With 1,4-dichloro-1,4-diazoniabicyclo[2,2,2]octane bischloride In water at 50℃; for 0.25h; pH=7; | 90% |
With N-Bromosuccinimide; β‐cyclodextrin In water; acetone at 20℃; for 0.333333h; | 80% |
2-(pentyloxy)tetrahydro-2H-pyran
pentanal
Conditions | Yield |
---|---|
With 1,4-dichloro-1,4-diazoniabicyclo[2,2,2]octane bis-chloride In water at 50℃; for 0.333333h; pH=7; | 90% |
With (H2DABCO)2(HDABCO)2(Br)2(Br3)4 In water at 80℃; for 0.333333h; | 90% |
Conditions | Yield |
---|---|
With potassium carbonate; tetrakis(triphenylphosphine) palladium(0) In 1,4-dioxane for 6h; Heating; | A n/a B 88% |
Conditions | Yield |
---|---|
With potassium carbonate; tetrakis(triphenylphosphine) palladium(0) In 1,4-dioxane for 6h; Heating; | A n/a B 87% |
Conditions | Yield |
---|---|
With hydrogen In water at 20℃; under 759.826 Torr; for 24h; | A 7% B 87% |
Conditions | Yield |
---|---|
With water; oxygen; rose bengal In tetrahydrofuran at 0℃; for 3h; Mechanism; Irradiation; | A 85% B n/a |
Conditions | Yield |
---|---|
In tetrahydrofuran for 3h; Product distribution; Mechanism; Ambient temperature; followed by reaction with aq. H2O2 / aq. NaHCO3; | 85% |
2-(2-butyl-1,3-dioxolan-4-yl)-3-phenyl-4H-1,1-dioxothiochromen-4-one
A
pentanal
B
2-(1,2-dihydroxyethyl)-3-phenyl-4H-thiochromen-4-one 1,1-dioxide
Conditions | Yield |
---|---|
In d(4)-methanol; water; water-d2; acetonitrile at 20℃; light irradiation; | A 84% B n/a |
Conditions | Yield |
---|---|
In hexane for 0.166667h; Ambient temperature; | 83% |
Conditions | Yield |
---|---|
With dihydrogen peroxide for 3h; Ionic liquid; Alkaline conditions; | 82% |
With dihydrogen peroxide; potassium carbonate In methanol; water for 8h; Ambient temperature; | 81% |
With N,N,N,N,-tetramethylethylenediamine; oxygen; copper In N,N-dimethyl-formamide for 28h; Ambient temperature; | 100 % Turnov. |
Conditions | Yield |
---|---|
With hydrogen; triethylamine; chromium(0) hexacarbonyl at 160℃; under 75006 Torr; for 3h; | 100% |
With C79H23ClIrNO2; potassium carbonate In isopropyl alcohol for 18h; Inert atmosphere; Reflux; | 99% |
94% |
Conditions | Yield |
---|---|
With poly(4-vinylpyridine)-supported sulfuric acid In dichloromethane at 20℃; for 0.5h; Green chemistry; chemoselective reaction; | 100% |
With 2,4,4,6-Tetrabromo-2,5-cyclohexadien-1-one at 50℃; for 20h; | 94% |
With sulfonated rice husk ash In neat (no solvent) at 20℃; for 0.0166667h; chemoselective reaction; | 91% |
Conditions | Yield |
---|---|
at 25℃; | 100% |
Conditions | Yield |
---|---|
With n-butyllithium In tetrahydrofuran at -78℃; to r.t.; | 100% |
Conditions | Yield |
---|---|
With citrate buffer In di-isopropyl ether for 13h; Ambient temperature; mandelonitrile lyase, pH 5.5; | 100% |
oxynitrilase; | 82% |
Conditions | Yield |
---|---|
Stage #1: hex-1-yne With n-butyllithium In tetrahydrofuran; hexane at -78℃; for 1h; Inert atmosphere; Stage #2: pentanal In tetrahydrofuran; hexane at -78℃; for 0.5h; Inert atmosphere; | 100% |
Stage #1: hex-1-yne With n-butyllithium In tetrahydrofuran; hexane at -78℃; for 0.5h; Inert atmosphere; Stage #2: pentanal In tetrahydrofuran; hexane at 20℃; for 0.5h; Inert atmosphere; | 92% |
With n-butyllithium In tetrahydrofuran at -78℃; for 2h; | 87% |
Conditions | Yield |
---|---|
With tin(ll) chloride In acetonitrile for 2h; Product distribution; Mechanism; variation of solvent; further reactions with various allylic tin compounds and carbonyls or imines; | 100% |
With tin(ll) chloride In acetonitrile for 2h; | 100% |
With ammonium cerium(IV) nitrate In acetonitrile at 20℃; for 0.416667h; | 90% |
With MgI2*(OEt)n In diethyl ether; dichloromethane; benzene at 20℃; for 5h; | 74% |
Conditions | Yield |
---|---|
In toluene at 50℃; for 1h; | 100% |
Conditions | Yield |
---|---|
With (2S)-2-{diphenyl[(trimethylsilyl)oxy]methyl}pyrrolidine In ethanol; water at -24℃; | 100% |
pentanal
dimethyl 3-aminophthalate
3-pentylamino-phthalic acid dimethyl ester
Conditions | Yield |
---|---|
With sodium tris(acetoxy)borohydride; acetic acid In dichloromethane | 100% |
Stage #1: pentanal; dimethyl 3-aminophthalate With acetic acid In dichloromethane for 0.0833333h; Stage #2: With sodium tris(acetoxy)borohydride In dichloromethane at 20℃; Stage #3: With water; sodium hydrogencarbonate In dichloromethane |
Conditions | Yield |
---|---|
toluene-4-sulfonic acid In benzene for 2.5h; Heating / reflux; | 100% |
Conditions | Yield |
---|---|
Stage #1: 2,6-Dibromopyridine With n-butyllithium In tetrahydrofuran; hexanes at -78℃; for 1h; Stage #2: pentanal In tetrahydrofuran; hexanes at -78℃; for 0.266667h; | 100% |
Conditions | Yield |
---|---|
With polymer-supported scandium(III) bis(trifluoromethanesulfonate) In acetonitrile at 20℃; for 0.5h; Strecker reaction; Combinatorial reaction / High throughput screening (HTS); chemoselective reaction; | 100% |
pentanal
trimethylsilyl cyanide
phenethylamine
2-(phenethylamino)hexanenitrile
Conditions | Yield |
---|---|
With polymer-supported scandium(III) bis(trifluoromethanesulfonate) In acetonitrile at 20℃; for 0.5h; Strecker reaction; Combinatorial reaction / High throughput screening (HTS); chemoselective reaction; | 100% |
pentanal
2-(2-bromo-allyl)-4,4,5,5-tetramethyl-[1,3,2]dioxaborolane
(S)-2-bromo-oct-1-en-4-ol
Conditions | Yield |
---|---|
Stage #1: 2-(2-bromo-allyl)-4,4,5,5-tetramethyl-[1,3,2]dioxaborolane With (R,R)-1,2-bis(2-cyclooctyl-4-fluoro-phenyl)ethane-1,2-diol; tin(IV) chloride; sodium carbonate In dichloromethane; toluene at -78℃; for 0.5h; Molecular sieve; Inert atmosphere; Stage #2: pentanal at -78℃; for 24h; Inert atmosphere; optical yield given as %ee; enantioselective reaction; Further stages; | 100% |
Conditions | Yield |
---|---|
With water; sodium tosylate at 20℃; for 7h; Passerini Condensation; | 100% |
Conditions | Yield |
---|---|
With sodium hydrogencarbonate; calcium chloride In diethyl ether; water for 1h; | 100% |
Conditions | Yield |
---|---|
With pyrrolidine In dichloromethane at 20℃; for 0.05h; | 100% |
pentanal
Conditions | Yield |
---|---|
With N-methylhydroxyamine hydrochloride; sodium hydrogencarbonate; calcium chloride In diethyl ether; water for 1h; | 100% |
pentanal
2,2-dichloropentanal
Conditions | Yield |
---|---|
With chlorine; pyrrolidine formamide hydrochloride In tetrachloromethane at 60 - 70℃; | 99.4% |
With chlorine In tetrachloromethane; N,N-dimethyl-formamide | 99.4% |
With chlorine; 2,6-lutidine hydrochloride In dichloromethane at 70℃; for 0.5h; Chlorination; | 92% |
Conditions | Yield |
---|---|
With rac-1',2',3',4'-tetrahydro-1,1'-bisisoquinoline In tetrahydrofuran at 20℃; for 24h; Henry Nitro Aldol Condensation; | 99% |
With 1,8-diazabicyclo[5.4.0]undec-7-ene; 1-ethyl-3-methylimidazolium tetrafluoroborate at 20℃; for 0.0333333h; Henry reaction; | 98% |
With potassium carbonate; 1-butyl-3-methylimidazolium Tetrafluoroborate at 20℃; for 6h; Henry reaction; | 93% |
Conditions | Yield |
---|---|
With C32H39Br2MgN2(1-)*C16H32LiO4(1+) In chloroform-d1 at 20℃; for 0.25h; Inert atmosphere; Glovebox; | 99% |
Fe(Cp)2PF6 at 20℃; for 0.166667h; | 89% |
With C32H39Br2MgN2(1-)*C16H32LiO4(1+) In chloroform-d1 at 20℃; for 0.25h; Glovebox; Inert atmosphere; chemoselective reaction; | 85% |
Conditions | Yield |
---|---|
With C4H11FeMo6NO24(3-)*3C16H36N(1+); water; oxygen; sodium carbonate at 50℃; under 760.051 Torr; for 8h; Green chemistry; | 99% |
With dihydrogen peroxide In acetic acid at 90℃; for 7h; | 98% |
With 4H3N*4H(1+)*CuMo6O18(OH)6(4-); water; oxygen; sodium carbonate at 50℃; under 760.051 Torr; for 12h; | 98% |
Conditions | Yield |
---|---|
With 1,2-dichloro-benzene at 140 - 170℃; for 0.166667h; | 99% |
Conditions | Yield |
---|---|
With pyridine at 20℃; for 18h; Condensation; | 99% |
Conditions | Yield |
---|---|
With diethyl ether; lithium perchlorate at 20℃; for 0.25h; coupling reaction; | 99% |
Conditions | Yield |
---|---|
With diethyl ether; lithium perchlorate at 20℃; for 0.25h; | 99% |
pentanal
racemic methyl phenyl sulfoxide
1-(phenylsulfinyl)-2-hexanol
Conditions | Yield |
---|---|
Stage #1: racemic methyl phenyl sulfoxide With lithium diisopropyl amide In tetrahydrofuran at -78℃; for 0.25h; Stage #2: pentanal In tetrahydrofuran at -78℃; for 0.25h; | 99% |
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