101669-82-3

Upstream product

• 101669-80-1 methyl (3S,4S)-N-tert-butoxycarbonyl-4-amino-3-hydroxy-5-phenylpentanoate 
• 98105-42-1 (S)-2-(t-butoxycarbonylamino)-3-cyclohexyl-1-propanal 
• 133333-28-5 (4S,5S)-5-Carboxymethyl-4-cyclohexylmethyl-2,2-dimethyl-oxazolidine-3-carboxylic acid tert-butyl ester 
• 178421-79-9 (4S,5S)-3-(tert-butoxycarbonyl)-5-cyanomethyl-4-cyclohexylmethyl-2,2-dimethyl-1,3-oxazolidine 
• 178421-69-7 (2S,3S)-3-azido-4-cyclohexyl-1,2-butanediol 
• 165683-87-4 (1S,2S)-1-(tert-butyldimethylsilyloxymethyl)-2-(tert-butoxycarbonylamino)-3-cyclohexylpropyl methanesulfonate 
• 165683-84-1 (2S,3S)-1-[(tert-butyldimethylsilyl)oxy]-3-[(tert-butoxycarbonyl)amino]-4-cyclohexyl-2-butanol 
• 104882-03-3 (2S,3S)-3-[(tert-butoxycarbonyl)amino]-4-cyclohexyl-1,2-butanediol 
• 108868-54-8 (3S,4S)-3-hydroxy-4-<(tert-butyloxycarbonyl)amino>-5-cyclohexylpentanenitrile 
• 145341-80-6 (4S,5S)-3-(tert-butoxycarbonyl)-4-cyclohexylmethyl-5-formylmethyl-2,2-dimethyl-1,3-oxazolidine 
• 107202-61-9 (2R,3S)-3-(t-butoxycarbonylamino)-4-cyclohexyl-1,2-epoxybutane 
• 132406-51-0 (4S,5S)-4-Cyclohexylmethyl-5-methoxycarbonylmethyl-2,2-dimethyl-oxazolidine-3-carboxylic acid tert-butyl ester 
• 67-56-1 methanol 
• 118219-46-8 (3S,4S)-4-tert-Butoxycarbonylamino-5-cyclohexyl-3-hydroxy-pentanoic acid (S)-2-hydroxy-1,2,2-triphenyl-ethyl ester 

Relevant academic research and scientific papers

Ready access to stereodefined β-hydroxy-γ-amino acids. Enantioselective synthesis of fully protected cyclohexylstatine

A convenient entry to enantiopure syn or anti β-hydroxy-γ-amino acids is described. The starting compounds for the synthesis, anti 3-amino-1,2-diols, are readily available in high enantiomeric purity through catalytic asymmetric epoxidation of an allylic alcohol and titanium-promoted oxirane opening. After adequate protection of the nitrogen, a stereodivergent sequence leads to both anti and syn N-Boc aminoalkyl epoxides. Subsequent regioselective ring-opening with cyanide, protection of the resulting secondary alcohol and nitrile to carboxyl conversion afford, in good yields, protected β-hydroxy-γ-amino acid belonging to either the anti (erythro) or syn (threo) series. This methodology has been applied to the enantioselective preparation of cyclohexylstatine, a key component of several aspartyl protease inhibitors, in fully protected form.

LEWIS ACID-PROMOTED DIRECT SUBSTITUTION OF 4-METHOXY- AND 4-PHENYLTHIO-2-OXAZOLIDINONES BY ALKYL CUPRATES. FACILE PREPARATION OF (3S,4S)-STATINE AND (3S,4S)-CYCLOHEXYLSTATINE.

Treatment of 4-methoxy- and 4-phenylthio-2-oxazolidinones with a combination of cuprates and BF3 results in smooth formation of 4-alkyl- and 4-aryl derivatives in high yield.By this method, the titled compounds of biological interest are readily synthesiz

A NOVEL SHORT AND EFFICIENT ASYMMETRIC SYNTHESIS OF STATINE ANALOGUES

The statine analogues 1a-c have been obtained in high optical purity via addition of chiral acetate enolate 4 to the α-aminoaldehydes 5a-c, followed by transesterification.