W(CO)<sub>5</sub>(L)-Catalyzed Tandem Intramolecular Cyclopropanation/Cope Rearrangement for the Stereoselective Construction of Bicyclo[5.3.0]decane Framework
作者:Hiroyuki Kusama、Yuji Onizawa、Nobuharu Iwasawa
DOI:10.1021/ja0671924
日期:2006.12.1
Utilizing the biscarbene character of electrophilically activated alkynes, a novel tandem intramolecular cyclopropanation/Cope rearrangement of 3-siloxy-1,3,9-trien-7-ynes catalyzed by W(CO)5(L) for the stereoselective construction of bicyclo[5.3.0]decane framework is achieved. When 3-siloxy-1,3,9-trien-7-ynes were treated with a catalytic amount of W(CO)6 under photoirradiation, bicyclo[5.3.0]decanes
利用亲电活化炔烃的双碳烯特性,W(CO)5(L)催化的3-siloxy-1,3,9-trien-7-ynes的新型串联分子内环丙烷化/Cope重排用于双环[ 5.3.0]癸烷框架实现。当 3-siloxy-1,3,9-trien-7-ynes 在光照射下用催化量的 W(CO)6 处理时,双环 [5.3.0] 癸烷以良好的立体选择性收率获得。在该反应中,二乙烯基环丙烷中间体的 Cope 重排,由 3-siloxy-1,3,9-trien-7-ynes 的分子内环丙烷化生成,基于 W(CO)5(L)-催化炔烃的亲电活化,发生立体选择性地产生合成有用的官能化双环[5.3.0]癸烷衍生物。