Diastereoselective Petasis Mannich reactions accelerated by hexafluoroisopropanol: a pyrrolidine-derived arylglycine synthesis
作者:Kausik K. Nanda、B. Wesley Trotter
DOI:10.1016/j.tetlet.2005.01.151
日期:2005.3
A diastereoselective synthesis of pyrrolidine-derived arylglycines has been developed using the Petasis boronic acid Mannich reaction. High diastereoselectivities in the reactions of chiral amines, aryl boronic acids, and glyoxylic acid monohydrate have been demonstrated for the first time. Key to the implementation of this method is the discovery that hexafluoroisopropanol accelerates the Petasis process
使用Petasis硼酸曼尼希反应已经开发了非对映选择性合成吡咯烷衍生的芳基甘氨酸的方法。首次证明在手性胺,芳基硼酸和乙醛酸一水合物的反应中具有很高的非对映选择性。实施该方法的关键是发现六氟异丙醇可加快Petasis过程,将反应时间从数天缩短至不到24小时。