Stereoselective Synthesis of β-Amino Acids by Aldol-Type Addition
摘要:
A synthesis of alpha-oxygenated beta-amino acid derivatives using an aldol-type addition is described. Depending on the enol equivalent different oxidation states of the oxygen substituent are accessible, while choosing a chiral imine allows to generate the aldol product in a stereoselective manner. This methodology has been applied to the synthesis of the biologically active compound Telaprevir, used in the traetment of hepatitis C.
A new method for the synthesis of N-t-butoxycarbonyl protected α-alkoxy amines from allylamines under neutral conditions
作者:Hisao Nemoto、Hermogenes N. Jimenez、Yoshinori Yamamoto
DOI:10.1039/c39900001304
日期:——
Treatment of the Boc protected allylamines (4) with rhodium catalysts in the presence of alcohols produces N-Boc substituted α-alkoxy amines (5) in high yields, which can be used as a synthetic equivalents of activated imines having an easily deprotectable Boc group.
The role of proton shuttling mechanisms in solvent-free and catalyst-free acetalization reactions of imines
作者:Victor J. Lillo、Javier Mansilla、José M. Saá
DOI:10.1039/c8ob01007b
日期:——
so in addition reactions of the type NuH + E → Nu–EH taking place undersolvent-free and catalyst-free conditions. Herein we show that the addition of alcohols or amines (the NuH component) to imine derivatives (the E component), in 1 : 1 ratio, undersolvent-free and catalyst-free conditions, are efficient methods to access N,O and N,N-acetal derivatives. In addition, computational studies reveal that
A synthesis of alpha-oxygenated beta-amino acid derivatives using an aldol-type addition is described. Depending on the enol equivalent different oxidation states of the oxygen substituent are accessible, while choosing a chiral imine allows to generate the aldol product in a stereoselective manner. This methodology has been applied to the synthesis of the biologically active compound Telaprevir, used in the traetment of hepatitis C.