Chromium(0)-Catalyzed Tandem Cyclization of α,β-Unsaturated Thioimidates Containing an Enyne Moiety
作者:Yusuke Karibe、Hiroyuki Kusama、Nobuharu Iwasawa
DOI:10.1002/anie.201201505
日期:2012.6.18
1‐azabicyclo[5.3.0]decane derivatives proceeds through 1,7‐electrocyclization of the zwitterionic intermediates that are formed in the cyclization of α,β‐unsaturated thioimidates containing an enyne moiety (see scheme). Furthermore 1,4‐addition of nucleophiles to α,β‐unsaturated carbene complex intermediates was also achieved.
双环:功能化的1-氮杂双环[5.3.0]癸烷衍生物的非对映选择性合成是通过两性离子中间体的1,7-电环化而进行的,该两性离子中间体是在环化包含烯炔部分的α,β-不饱和硫代亚氨酸酯时形成的(参见方案)。此外,还实现了亲核试剂向α,β-不饱和卡宾配合物中间体的1,4加成反应。