Diastereoselective reduction of N-protected beta-amino ketones does not proceed effectively under the conditions used for chelation controlled reductions of N-alkyl beta-amino ketones. A thorough analysis of various conditions required for the stereoselective reduction of gamma-aryl-gamma-oxo-beta-amino alcohols is reported. The products of the syn-selective reduction are used for the preparation of a ceramide trafficking inhibitor HPA-12 and analogues. (C) 2015 Elsevier Ltd. All rights reserved.
Synthesis of γ-Oxo γ-Aryl and γ-Aryl α-Amino Acids from Aromatic Aldehydes and Serine
作者:Shibin Chacko、Ramesh Ramapanicker
DOI:10.1002/ejoc.201201128
日期:2012.12
γ-Oxo α-aminoacids and γ-aryl α-aminoacids are compounds with very interesting biological properties and are active components of many drug molecules. Oxo aminoacids are also used as synthetic precursors for a number of unnatural aminoacids and amino alcohols. We report a very efficient synthesis of such compounds through the coupling of aromatic dithianes, prepared from aromatic aldehydes and an