Design, Synthesis, and Evaluation of a New Generation of Modular Nucleophilic Glycine Equivalents for the Efficient Synthesis of Sterically Constrained α-Amino Acids
作者:Trevor K. Ellis、Hisanori Ueki、Takeshi Yamada、Yasufumi Ohfune、Vadim A. Soloshonok
DOI:10.1021/jo0616198
日期:2006.10.1
A new generation of modular achiral glycine equivalents have been evaluated with respect to their synthetic utility for the production of tailor-made, sterically constrained α-amino acids, which proved to be the most efficient approach developed to date for the synthesis of symmetrical α,α-disubstituted-α-amino acids. Among the new series of achiral glycine equivalents, one was found to be a superior
已评估了新一代模块化的非手性甘氨酸等效物在合成中的应用,以生产量身定制的,空间受限的α-氨基酸,这被证明是迄今为止开发出的最有效的合成对称α的方法, α-二取代-α-氨基酸。在新的非手性甘氨酸等效物系列中,发现其中一个是对于具有各种(R)-或(S)-N-(E-烯酰基)-4-苯基-1,3-恶唑烷-2-酮代表空间受限的β-取代焦谷氨酸的一般和实用合成。特别地,这些络合物的应用允许制备几种β-取代的焦谷氨酸,其在结构中包括释放电子和空间上要求的取代基,从而提高了合成效率并扩展了这些迈克尔加成反应的通用性。