Total synthesis of 3,4-dihydroxyprolines, d-threo-l-norvaline and (2S,3R,4R)-2-amino-3,4-dihydroxytetrahydrofuran-2-carboxylic acid methyl ester
摘要:
The Henry reaction between D-glyceraldehyde and ethyl nitroacetate allowed the practical development of a diastereoselective synthesis of 3,4,5-trihydroxy-2-nitropentanoic acid esters, which were reduced to polyoxamic acids, which were used in a new diastereoselective synthesis of 3,4-dihydroxyprolines and new enantioselective syntheses Of D-threo-L-norvaline and (2S,3R,4R)-2-amino-3,4-dihydroxytetrahydrofuran-2-carboxylic acid methyl ester. (C) 2003 Elsevier Ltd. All rights reserved.
Total synthesis of 3,4-dihydroxyprolines, d-threo-l-norvaline and (2S,3R,4R)-2-amino-3,4-dihydroxytetrahydrofuran-2-carboxylic acid methyl ester
摘要:
The Henry reaction between D-glyceraldehyde and ethyl nitroacetate allowed the practical development of a diastereoselective synthesis of 3,4,5-trihydroxy-2-nitropentanoic acid esters, which were reduced to polyoxamic acids, which were used in a new diastereoselective synthesis of 3,4-dihydroxyprolines and new enantioselective syntheses Of D-threo-L-norvaline and (2S,3R,4R)-2-amino-3,4-dihydroxytetrahydrofuran-2-carboxylic acid methyl ester. (C) 2003 Elsevier Ltd. All rights reserved.
Crude<i>D</i>‐(+)‐Glyceraldehyde Obtained from<i>D</i>‐Mannitol‐Diacetonide by Oxidative Cleavage with Sodium Periodate: Its Reactions with Nucleophilic Species
作者:Jorge L. de O. Domingos、Guilherme V. M. de A. Vilela、Paulo R. R. Costa、Ayres G. Dias
DOI:10.1081/scc-120027706
日期:2004.12.31
The oxidative cleavage of D-(+)-mannitol-diacetonide with sodium periodate lead to a mixture of D-(+)-glyceraldehyde, its hydrate and oligomeric derivatives. In spite of the low concentration of free glyceraldehyde (estimated in similar to20%, by NMR), good yields were obtained in nucleophilic additions involving this mixture and a variety of nucleophiles (amines, phosphonates, phosphoranes, nitronates, organometallic compounds).