Chiral, Non-racemic, Distally-bridged Resorcin[4]arenes as Models for Use in Asymmetric Processes
作者:Gareth Arnott、Philip C. Bulman Page、Harry Heaney、Roger Hunter、Edward P. Sampler
DOI:10.1055/s-2001-11400
日期:——
The synthesis of enantiomerically pure, distally-bridged resorcinarenes 3 with various R groups (CH3, C5H11, C11H23) is reported. The key step makes use of the Mannich reaction for attachment of a chiral diamine-line 2 across the cavity. Yields for this step are good to excellent. One of the bridged compounds exhibits modest activity (27% ee) as an enantioselective catalyst in the addition of diethylzinc to benzaldehyde.
报告了具有不同 R 基团(CH3、C5H11、C11H23)的对映体纯、远端桥接的间苯二酚 3 的合成。关键步骤是利用曼尼希反应将手性二胺线 2 跨空腔连接起来。该步骤的收率从良好到极佳。在二乙基锌与苯甲醛的加成反应中,其中一种桥接化合物作为对映体选择性催化剂表现出适度的活性(27% ee)。