作者:Stephen K. Jackson、Avedis Karadeolian、Alex B. Driega、Michael A. Kerr
DOI:10.1021/ja710289k
日期:2008.3.1
serve as precursors to the ubiquitous pyrrolidine motif. A simple reversal of addition order of catalyst and substrate results in formation of two discrete diastereomers in a highly selective and predictable manner. The adducts are prepared in excellent yields from either enantiomer of an alkoxyamino-tethered cyclopropanediester, allowing efficient access to highly substituted homochiral pyrrolidines
肟醚和环丙烷二酯的分子内反应导致取代的吡咯并异恶唑烷的非对映选择性形成,作为无处不在的吡咯烷基序的前体。催化剂和底物添加顺序的简单颠倒导致以高度选择性和可预测的方式形成两种离散的非对映异构体。加合物由烷氧基氨基系环丙二酯的任一对映异构体以优异的产率制备,允许有效地获得高度取代的同手性吡咯烷。