Stereoselective Metal-Free Synthesis of β-Amino Thioesters with Tertiary and Quaternary Stereogenic Centers
作者:Annette Bahlinger、Sven P. Fritz、Helma Wennemers
DOI:10.1002/anie.201310532
日期:2014.8.11
β‐Amino thioesters are important natural building blocks for the synthesis of numerous bioactive molecules. An organocatalyzed Mannich reaction was developed which provides direct and highly stereoselective access to acyclic β2‐ and β2,3,3‐amino thioesters with adjacent tertiary and quaternary stereocenters. Mechanistic studies showed that the stereochemical course of the reaction can be controlled
β-氨基硫酯是许多生物活性分子合成的重要天然组成部分。一个organocatalyzed曼尼希反应被开发,其提供到无环β直接和高立体选择性访问2 -和β 2,3,3 -氨基硫酯与相邻的三级和四级立体。机理研究表明,可以通过选择底物来控制反应的立体化学过程。的β氨基硫酯被进一步官能化,例如,立体选择性脱羧访问β 2,3 -frameworks。另外,β-氨基硫酯的值在无偶联试剂的肽合成中得到显示。