Asymmetric Brønsted Acid Catalyzed Cycloadditions-Efficient Enantioselective Synthesis of Pyrazolidines, Pyrazolines, and 1,3-Diamines from<i>N</i>-Acyl Hyrazones and Alkenes
作者:Magnus Rueping、Modhu Sudan Maji、Hatice Başpınar Küçük、Iuliana Atodiresei
DOI:10.1002/anie.201205813
日期:2012.12.14
A general, metal‐free, highly enantioselective Brønsted acid catalyzed [3+2] cycloaddition between hydrazones and alkenes has been developed that affords pyrazolidine derivatives (see scheme). The resulting optically active pyrazolidines can undergo many chemical transformations which allow, for example, the enantioselective synthesis of valuable pyrazolines and 1,3‐diamines.
已经开发了一种在metal和烯烃之间催化的,无金属,高对映选择性的布朗斯台德酸催化的[3 + 2]环加成反应,该反应可提供吡唑烷衍生物(参见方案)。所产生的旋光吡唑烷可能经历许多化学转化,例如,可以对映选择性合成有价值的吡唑啉和1,3-二胺。