Synthesis of 2,3-Disubstituted Pyrrolidines and Piperidines via One-Pot Oxidative Decarboxylation−β-Iodination of Amino Acids
作者:Alicia Boto、Rosendo Hernández、Yolanda de León、Ernesto Suárez
DOI:10.1021/jo015877a
日期:2001.11.1
of the solvent and the ring size of the starting amino acid are studied, as well as the nature of the protecting group on the nitrogen. The stereoselectivity of the reaction was also studied using chiral methyl (2S,4S)-4-acetyloxyproline-1-carboxylate (8). The products obtained can be manipulated to give bicyclic systems present in many natural products. By using the tandem decarboxylation-iodination-alkylation
描述了2,3-二取代的吡咯烷和哌啶的新合成。这种温和的程序是基于α-氨基酸氨基甲酸酯或酰胺的一锅氧化脱羧-β-碘化。在先前未官能化的3-位引入碘。可以在C-2处引入不同的取代基,例如羟基,烷氧基,烯丙基,烷基等。仅获得C-2和C-3取代基之间的反式关系。研究了溶剂和起始氨基酸的环大小的影响,以及保护基团在氮上的性质。还使用手性(2S,4S)-4-乙酰氧基脯氨酸-1-羧酸甲酯(8)研究了反应的立体选择性。可以对获得的产物进行处理,以产生许多天然产物中存在的双环系统。