A Convenient Approach to the Synthesis of ω-Heterocyclic Amino Acids from Carboxy Lactams through Ring-Chain Transformation; Part 1: Synthesis of (2<i>S</i>)-/(2<i>R</i>)-2-Amino-4-(1-aryl-/1,5-diaryl-1<i>H</i>-pyrazol-3-yl)butyric Acid
作者:Sanjay Jain、Nitya Anand、Rakesh Singh、Neelima Sinha、Mohammad Salman、Fehmida Naqvi
DOI:10.1055/s-2005-872166
日期:——
A general method is reported for the synthesis of co-heterocyclic α-amino acids, which involves preparation of enaminone intermediates from thiolactams, followed by reaction with dinucleophiles, resulting in a single-stepcondensation and ring-chain transformation to the desired ω-heterocyclic α-amino acids after deprotection of amine and carboxylic group. The reaction steps preserve the chirality of
报道了一种合成共杂环α-氨基酸的通用方法,该方法涉及从硫内酰胺制备烯胺酮中间体,然后与双亲核试剂反应,导致一步缩合和环链转变为所需的ω-杂环α -氨基和羧基脱保护后的氨基酸。反应步骤保留了母体取代的内酰胺的手性。该方法通过 (2S)- 和 (2R)-2-amino-4-(1-aryl-/1,5-diaryl-1H-pyrazol-3-yl)butyric 酸的合成来说明。