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Conditions | Yield |
---|---|
With thionyl chloride at 0℃; for 25h; Temperature; Reflux; | 80% |
With hydrogenchloride Heating; | |
With hydrogenchloride for 5h; Heating; Yield given; |
N-(tert-butoxycarbonyl)-l-threonine methyl ester
L-threonine methyl ester
Conditions | Yield |
---|---|
With toluene-4-sulfonic acid In acetone at 10 - 25℃; for 2h; | 70% |
methanol
A
(2S,3S)-methyl 2-amino-3-hydroxybutanoate
B
L-threonine methyl ester
Conditions | Yield |
---|---|
Multistep reaction; |
Conditions | Yield |
---|---|
With thionyl chloride In methanol |
L-threonine methyl ester
trityl chloride
methyl (2S,3R)-3-hydroxy-2-triphenylmethylaminobutanoate
Conditions | Yield |
---|---|
With triethylamine In dichloromethane at 0 - 20℃; | 100% |
With triethylamine In chloroform at 20℃; Alkylation; triphenylmethylation; tritylation; | 89% |
L-threonine methyl ester
(4S,5R)-4-[(Z)-(S)-3-(tert-Butyl-diphenyl-silanyloxy)-1-carboxy-but-1-enylcarbamoyl]-2,2,5-trimethyl-oxazolidine-3-carboxylic acid tert-butyl ester
(4S,5R)-4-[(Z)-(S)-3-(tert-Butyl-diphenyl-silanyloxy)-1-((1S,2R)-2-hydroxy-1-methoxycarbonyl-propylcarbamoyl)-but-1-enylcarbamoyl]-2,2,5-trimethyl-oxazolidine-3-carboxylic acid tert-butyl ester
Conditions | Yield |
---|---|
With (benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate; N-ethyl-N,N-diisopropylamine | 100% |
L-threonine methyl ester
L-threonine methyl ester hydrochloride
Conditions | Yield |
---|---|
With hydrogenchloride In methanol at 20℃; for 18h; Inert atmosphere; | 100% |
L-threonine methyl ester
Allyl chloroformate
N-Allyloxycarbonyl-L-threonine methyl ester
Conditions | Yield |
---|---|
With triethylamine In acetonitrile at 0 - 20℃; for 18.5h; Substitution; | 98% |
Conditions | Yield |
---|---|
With acetic acid In tetrahydrofuran for 16h; Microwave irradiation; | 98% |
L-threonine methyl ester
N-methyl-N-(benzyloxycarbonyl)-D-leucine
-threonine methyl ester
Conditions | Yield |
---|---|
With (benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate; N-ethyl-N,N-diisopropylamine In dichloromethane | 97% |
L-threonine methyl ester
methyl chloroformate
(2S,3R)-3-methoxy-2-(methoxycarbonylamino)butanoic acid
Conditions | Yield |
---|---|
With sodium hydroxide In water at 0℃; for 12h; | 97% |
Conditions | Yield |
---|---|
With acetic acid In tetrahydrofuran at 70℃; for 4h; Temperature; Microwave irradiation; | 96% |
L-threonine methyl ester
benzoyl chloride
N-benzoyl-L-threonine methyl ester
Conditions | Yield |
---|---|
With triethylamine In dichloromethane at 0℃; for 12h; | 95% |
With sodium hydrogencarbonate In tetrahydrofuran; water at 0 - 20℃; | |
With sodium hydrogencarbonate In 1,4-dioxane; water at 0℃; |
di-tert-butyl dicarbonate
L-threonine methyl ester
N-(tert-butoxycarbonyl)-l-threonine methyl ester
Conditions | Yield |
---|---|
With triethylamine In dichloromethane | 95% |
With sodium hydrogencarbonate In methanol; water at 20℃; for 20h; | 92% |
With triethylamine In dichloromethane | |
With triethylamine In water; acetonitrile at 0 - 20℃; | 8.08 g |
With triethylamine In methanol at 10 - 35℃; |
Conditions | Yield |
---|---|
Stage #1: Boc-D-Phe-OH With 4-methyl-morpholine; benzotriazol-1-ol; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride In tetrahydrofuran at 0℃; for 0.166667h; Stage #2: L-threonine methyl ester In tetrahydrofuran; N,N-dimethyl-formamide at 20℃; for 18h; | 95% |
2,6-dichloropyridine-3-carboxylic acid
L-threonine methyl ester
Conditions | Yield |
---|---|
With benzotriazol-1-yloxyl-tris-(pyrrolidino)-phosphonium hexafluorophosphate; N-ethyl-N,N-diisopropylamine In tetrahydrofuran at 0℃; for 5h; Inert atmosphere; | 94% |
Conditions | Yield |
---|---|
With acetic acid In tetrahydrofuran for 16h; Microwave irradiation; | 94% |
Conditions | Yield |
---|---|
With dicyclohexyl-carbodiimide In dichloromethane | 93% |
With dicyclohexyl-carbodiimide |
(2-oxocyclopent)acetic acid
L-threonine methyl ester
(2R,3S,5aR,8aS)-2-methyl-4-oxo-octahydro-1-oxa-3a-aza-cyclopenta[c]pentalene-3-carboxylic acid methyl ester
Conditions | Yield |
---|---|
at 110℃; under 11251.1 Torr; Meyer synthesis; Microwave irradiation; optical yield given as %de; | 93% |
Conditions | Yield |
---|---|
With acetic acid In tetrahydrofuran for 16h; Microwave irradiation; | 93% |
L-threonine methyl ester
1-benzotriazolyl 3β-hydroxyolean-12-en-28-oate
Conditions | Yield |
---|---|
With sodium carbonate In N,N-dimethyl-formamide at 20℃; for 0.333333h; | 93% |
L-threonine methyl ester
N-(Benzyloxycarbonyl)glycine
Cbz-Gly-L-Thr-OMe
Conditions | Yield |
---|---|
With benzotriazol-1-ol; dicyclohexyl-carbodiimide | 92% |
Stage #1: N-(Benzyloxycarbonyl)glycine With 4-methyl-morpholine; benzotriazol-1-ol; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride In tetrahydrofuran at 0℃; for 0.166667h; Stage #2: L-threonine methyl ester In tetrahydrofuran; N,N-dimethyl-formamide at 20℃; for 18h; | 86% |
With Sephadex G-50; triethylamine; bromelain In ethyl acetate at 37℃; for 7h; | 50% |
L-threonine methyl ester
ethyl benzimidate hydrochloride
(4S,5R)-4-methyl-2-phenyl-4,5-dihydrooxazole-4-carboxylic acid methyl ester
Conditions | Yield |
---|---|
With triethylamine In dichloromethane at 20℃; for 24h; | 92% |
In chloroform for 12h; Heating; | 85% |
L-N-Boc-Ala
L-threonine methyl ester
methyl (tert-butoxycarbonyl)-L-alanyl-L-threoninate
Conditions | Yield |
---|---|
With benzotriazol-1-ol; dicyclohexyl-carbodiimide In ethyl acetate Acylation; | 92% |
Stage #1: L-N-Boc-Ala With benzotriazol-1-yloxyl-tris-(pyrrolidino)-phosphonium hexafluorophosphate; N-ethyl-N,N-diisopropylamine In dichloromethane for 0.75h; Stage #2: L-threonine methyl ester With N-ethyl-N,N-diisopropylamine In dichloromethane at 20℃; | 82% |
L-threonine methyl ester
(4S,5R)-3-((benzyloxy)carbonyl)-2,2,5-trimethyloxazolidine-4-carboxylic acid
(4S,5R)-4-((1S,2R)-2-Hydroxy-1-methoxycarbonyl-propylcarbamoyl)-2,2,5-trimethyl-oxazolidine-3-carboxylic acid benzyl ester
Conditions | Yield |
---|---|
With benzotriazol-1-ol; dicyclohexyl-carbodiimide In N,N-dimethyl-formamide | 92% |
L-threonine methyl ester
(3S)-2-tert-butoxycarbonyl-1,2,3,4-tetrahydro-beta-carboline-3-carboxylic acid
(S)-tert-butyl 3-((2S)-3-hydroxy-1-methoxy-1-oxobutan-2-ylcarbamoyl)-3,4-dihydro-1H-pyrido[3,4-b]indole-2(9H)-carboxylate
Conditions | Yield |
---|---|
With benzotriazol-1-ol; dicyclohexyl-carbodiimide In tetrahydrofuran at 0 - 20℃; for 18h; | 92% |
Stage #1: (3S)-2-tert-butoxycarbonyl-1,2,3,4-tetrahydro-beta-carboline-3-carboxylic acid With benzotriazol-1-ol In tetrahydrofuran at 0℃; for 0.166667h; Stage #2: L-threonine methyl ester With 4-methyl-morpholine; dicyclohexyl-carbodiimide In tetrahydrofuran at 0 - 20℃; for 18h; | 87% |
L-threonine methyl ester
Conditions | Yield |
---|---|
With (benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate; benzotriazol-1-ol; triethylamine In dichloromethane | 90.2% |
Conditions | Yield |
---|---|
With benzotriazol-1-ol; dicyclohexyl-carbodiimide | 90% |
L-threonine methyl ester
(R/S)-tert-butyl-5-((2S,3R)-3-hydroxy-1-methoxy-1-oxobutan-2-ylcarbamoyl)-3-oxo-2-phenylpyrazolidine-1-carboxylate
Conditions | Yield |
---|---|
With benzotriazol-1-ol; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; triethylamine In dichloromethane at 0 - 20℃; for 10h; | 90% |
L-threonine methyl ester
(S)-4-amino-3-(2-(tert-butoxycarbonylamino)-4-phenylbutanamido)benzoic acid
(2S,3R)-methyl 2-(4-amino-3-((S)-2-(tert-butoxycarbonylamino)-4-phenylbutanamido) benzamido)-3-hydroxybutanoate
Conditions | Yield |
---|---|
With O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate; N-ethyl-N,N-diisopropylamine In N,N-dimethyl-formamide at 25℃; for 12h; Inert atmosphere; | 90% |
Conditions | Yield |
---|---|
With acetic acid In tetrahydrofuran at 70℃; for 5h; Microwave irradiation; | 90% |
L-threonine methyl ester
methylpropioimidate hydrochloride
Conditions | Yield |
---|---|
In dichloromethane for 24h; Ambient temperature; | 89% |
L-threonine methyl ester
4-methoxy-benzaldehyde
N-(p-methoxybenzyl)-L-threonine methyl ester
Conditions | Yield |
---|---|
With sodium cyanoborohydride; acetic acid In methanol at 0 - 20℃; for 17h; | 89% |
N,N-diethyl(α,α-difluoro-4-methoxybenzyl)amine
L-threonine methyl ester
methyl (4S,5R)-2-(4-methoxyphenyl)-5-methyl-4,5-dihydrooxazole-4-carbonylate
Conditions | Yield |
---|---|
In dichloromethane at 40℃; for 1h; | 89% |
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