Benzo[d]imidazole and Aliphatic α-Amino Acid Derived Primary Amines in Asymmetric Aldol Reactions
作者:Filip Bureš、Pravinkumar Mohite、Pavel Drabina
DOI:10.1055/s-0033-1340598
日期:——
ted primary amines were synthesized. The reaction sequence involves activation of the Boc-amino acid carboxylic acid, reaction with o -phenylenediamine, and subsequent cyclization to benzo[ d ]imidazole. N-Methylation and final Boc group removal afforded four new primary amines. The synthesized amines were preliminarily applied as organocatalysts in an asymmetric version of the aldol reaction between
从必需的α-氨基酸开始,合成了四种新的苯并[d]咪唑和烷基链取代的伯胺。反应顺序包括Boc-氨基酸羧酸的活化、与邻苯二胺的反应以及随后环化为苯并[d]咪唑。N-甲基化和最终的 Boc 基团去除提供了四种新的伯胺。合成的胺初步用作 4-硝基苯甲醛和丙酮/环己酮之间的不对称羟醛反应的有机催化剂,化学产率达到 40-64%,ee 和 de 值分别高达 65% 和 96%。