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Product name: L-Threonine CAS No.:72-19-5 Molecule Formula:C4H9NO3 Molecule Weight:119.1192 Purity: 99.6% Package: 25kg/drum Description:White flake crystalline powder Manufacture Standards: USP Items
L-threonine feed grade 98.5% --- Functions: 1). an essential amino acid that is added to the diet of pigs and poultry in order to exactly match the… Appearance:White to Off White Powder Storage:cool and dry place Package:25kg/bag Applicatio
Items Standard Result Appearance White powder Conform Assay % 99.0-100.5
Cas:72-19-5
Min.Order:1 Kilogram
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Type:Manufacturers
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Min.Order:1 Kilogram
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inquiryHot Sale L-Threonine/72-19-5 Product name:L-Threonine CAS:72-19-5 Shelf life:2 years Quality: TOP Appearance:Solid powder Storage:Sealed,light and oxygen resistant Package:Foil bag or drum Application:Applied in dietary supplements,p
Product description: Product name L-Threonine CAS number 72-19-5 Assay ≥99% Appearance White powder Capacity 100mt/year Application Organic intermediate More informa
Unique advantages of L-Threonine Cas 72-19-5 Guaranteed purity High quality & competitive price Quality control Fast feedback Prompt shipment Appearance:White crystal or crystalline powder Storage:cool dry place Package:25kg/drum Ap
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Min.Order:25 Kilogram
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Cas:72-19-5
Min.Order:1 Kilogram
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Cas:72-19-5
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Cas:72-19-5
Min.Order:1 Kilogram
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inquiryL-Threonine CAS 72-19-5 H-Thr-OH L-2-Amino-3-hydroxybutyric acid CAS no 72-19-5 L-(-)-Threonine (2S,3R)-2-Amino-3-hydroxybutyric acid L-Threonine Manufacturer High quality Best price In stock factory CAS 72-19-5 L-Threonine COA TDS price MSDS
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Min.Order:5 Kiloliter
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inquiryName:L-Threonine CAS NO:72-19-5 Grade:Medical scientific research and export Molecular formula:C4H9NO3 Molecular weight:119.1192 Product Quality 12 years of chemical raw materials Mature operation of the industry System stability Data sto
Cas:72-19-5
Min.Order:25 Kilogram
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Min.Order:1 Kilogram
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L-Threonine CAS No.:72-19-5 Molecular formula:C9H11NO2 Molecular weight: 119.12 Property:White crystal or crystalline powder, odorless, slightly sweet taste, melting point 253 ℃ decomposition, soluble in water, insoluble in ethanol. Use:
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inquiryAppearance:yellow powder Storage:2-8°C Package:25kg/drum Application:1.Threonine is an important nutritional supplement which could fortify cereals, pastries, dairy products, restore the body as fatigue, and promote growth and development like try
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inquiryConditions | Yield |
---|---|
In pyridine Product distribution; | A 83.8% B n/a |
methanol
Fmoc-Thr-OH
A
L-threonine
B
N-methyl threonine
C
N,N-dimethyl-threonine
Conditions | Yield |
---|---|
With hydrogen; acetic acid; palladium on activated charcoal for 48h; other (protected) amino acids; other alcohol; | A n/a B 40% C n/a |
A
L-threonine
Conditions | Yield |
---|---|
Yields of byproduct given; |
Conditions | Yield |
---|---|
With pyridoxal 5'-phosphate; L-threonine aldolase In phosphate buffer at 25℃; for 3h; |
L-threonine
Conditions | Yield |
---|---|
With hydrogenchloride; water at 110℃; for 20h; |
L-threonine
Conditions | Yield |
---|---|
With ferrous(II) sulfate heptahydrate; cobalt(II) sulphate heptahydrate; N-succinyl L-amino acid desuccinylase from Burkholderia ambifaria AMMD; N-succinyll-amino acid β-hydroxylase from Burkholderia ambifaria AMMD; ascorbic acid In aq. phosphate buffer at 30℃; for 24h; Enzymatic reaction; |
methanol
L-threonine
L-threonine methyl ester hydrochloride
Conditions | Yield |
---|---|
With thionyl chloride at 0℃; for 3.25h; Reflux; | 100% |
Conditions | Yield |
---|---|
With hydrogenchloride; sodium hydroxide; sodium carbonate In methanol; dichloromethane | 98% |
With sodium hydrogencarbonate In diethyl ether; water |
L-threonine
Conditions | Yield |
---|---|
In methanol byproducts: acetylacetone; to a soln. of complex in methanol was added amino acid, the mixt. was refluxed for 3 h, cooled; evapd. to dryness, treated with diethyl ether, the solid was filtered, washed with diethyl ether, air-dried; | 85% |
L-threonine
toluene-4-sulfonic acid
allyl alcohol
L-Threonin-allylester-hydro-p-toluolsulfonat
Conditions | Yield |
---|---|
In benzene Heating; | 84% |
hydrogenchloride
sodium tetrahydroborate
ferrocenecarboxaldehyde
L-threonine
Conditions | Yield |
---|---|
With LiOH*H2O In methanol L-threonine and LiOH*H2O in dry MeOH stirred for 30 min; MeOH soln. of Fe complex added dropwise; stirred for 20 min; treated with NaBH4 with stirring; solvent evapd.; dissolved in H2O; acidified with dilute HCl (pH 5-7); filtered; ppt. washed with H2O; dried in vac. desiccator; elem. anal.; | 84% |
Conditions | Yield |
---|---|
In pyridine; water for 3h; Ambient temperature; | A n/a B 75% |
Conditions | Yield |
---|---|
In ethanol salicylaldehyde added with stirring to mixt. of Co complex and amino acid in EtOH; refluxed for 3 h; filtered; filtrate concd. in vac.; residue washed with Et2O; dissolved in EtOH; column chromd. (Al2O3, EtOH); purified by gel chromy. (Sephadex LH-20, EtOH-benzene 1:3); elem. anal.; | 70% |
Conditions | Yield |
---|---|
In ethanol aldehyde was added with stirring to mixt. of Co complex and amino acid in EtOH; refluxed for 3 h; filtered; evapd. (vac.); washed (Et2O); dissolved in EtOH; chromd. (Al2O3, EtOH); chromd. (gel, EtOH/C6H6, 1/3); dissolved in aq. EtOH; passed through ion-exchange resin; evapd. (vac.); chromd. (gel, EtOH/C6H6, 1/3);elem. anal.; | 70% |
1-Methyl-4-piperidone
L-threonine
2,6-dimethylphenyl isonitrile
Conditions | Yield |
---|---|
With triethylamine In 2,2,2-trifluoroethanol at 100℃; for 24h; | 70% |
L-threonine
3-allyl-5-bromosalicylaldehyde
Conditions | Yield |
---|---|
In ethanol aldehyde was added with stirring to mixt. of Co complex and amino acid in EtOH; refluxed for 3 h; filtered; evapd. (vac.); washed (Et2O); dissolved in EtOH; chromd. (Al2O3, EtOH); chromd. (gel, EtOH/C6H6, 1/3); dissolved in aq. EtOH; passed through ion-exchange resin; evapd. (vac.); chromd. (gel, EtOH/C6H6, 1/3);elem. anal.; | A 22% B 65% |
L-threonine
6-nitro-2-oxo-2H-chromene-3-carbonyl chloride
6-nitrocoumarin-3-CO-L-Thr
Conditions | Yield |
---|---|
With triethylamine In 1,4-dioxane 1) room temperature, 2) 2 h, reflux; | 54% |
L-threonine
Conditions | Yield |
---|---|
With triethylamine In N,N-dimethyl-formamide 120-130°C, 1.0 h; cooling, filtration into ether (sepn. of oil), decantation, washing (ether), extn. into Me2CO, filtration, chromy. (Al2O3, Me2CO, then MeOH/H2O=5:1), evapn. (reduced pressure, 60-70°C); | 40% |
L-threonine
Conditions | Yield |
---|---|
With NaOH In water stoichiometric equiv. of Ni(ClO4)2*6H2O and L-threonine added to aq. soln. of La(ClO4)3*6H2O; pH adjusted to 6.6 by slow addition of NaOH aq. soln.; stirred for 2 h; filtered to remove precipitates formed; placed in a desiccator filled with P2O5 for 1 month; elem. anal.; | 35% |
L-threonine
Conditions | Yield |
---|---|
With NaOH In water adjusting the pH of an aq. soln. of the CoBr2 complex and (S)-thr to 8.0 with NaOH, evapn. to near dryness (after 1 h), addn. of a slight excess of an aq. NaClO4 soln., crystn.; elem. anal.; | 30% |
L-threonine
benzyl chloroformate
N-[(phenylmethoxy)carbonyl]-L-threonine
Conditions | Yield |
---|---|
With sodium hydrogencarbonate |
β-D-glucose
L-threonine
A
1-hydroxy-propane-1,2,3-tricarboxylic acid
C
citric acid
Conditions | Yield |
---|---|
With Saccharomycopsis lipolytica In water at 26℃; for 120h; Product distribution; also in n-hexadecane medium; catabolism of amino acids by S. lipolytica; |
succinimidyl 2,2,2-trichloroethyl carbonate
L-threonine
N-(2,2,2-trichloroethoxycarbonyl)-threonine
Conditions | Yield |
---|---|
With sodium hydroxide; sodium hydrogencarbonate In 1,4-dioxane for 0.166667h; Ambient temperature; |
L-threonine
N-benzyloxycarbonylalaninehydrazid
Conditions | Yield |
---|---|
With hydrogenchloride; tert.-butylnitrite; triethylamine 1. DMF, dioxane, -10 degC, 10 min, 2.) H2O, cold; Yield given. Multistep reaction; |
L-threonine
[(R)-1-[(S)-1-(Hydrazinocarbonylmethyl-carbamoyl)-ethylcarbamoyl]-2-(4-methoxy-benzylsulfanyl)-ethyl]-carbamic acid tert-butyl ester
Boc-Cys(MBzl)-Ala-Gly-Thr-OH
Conditions | Yield |
---|---|
With hydrogenchloride; tert.-butylnitrite; triethylamine 1.)DMF, dioxane, -25 degC, 10 min, 2.) H2O, cold; Yield given. Multistep reaction; |
L-threonine
D-allo-threonine
Conditions | Yield |
---|---|
With hydrogenchloride; ethanethiol at 110℃; Rate constant; various times; |
L-threonine
(2S,3R)-2-chloro-3-hydroxybutanoic acid
Conditions | Yield |
---|---|
With hydrogenchloride; sodium nitrite at -5℃; for 5h; |
Conditions | Yield |
---|---|
With hydrogenchloride; chloroamine-T In water at 29.9 - 44.9℃; Thermodynamic data; Rate constant; Ea, log A, -ΔS(excit.), ΔH(excit.), ΔG(excit.); further acid concentration, further acid and alkaline media; |
L-threonine
Conditions | Yield |
---|---|
With hydroxide In water Mechanism; Ambient temperature; Irradiation; examination of effect of protonation state of amino group; |
Conditions | Yield |
---|---|
Yield given; |
Conditions | Yield |
---|---|
With thionyl chloride 1)r.t., methanol, 2) 40 deg C 30 min, water; Multistep reaction; |
Conditions | Yield |
---|---|
With hydroxide |
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