Tandem Cyclization of Enynes Containing a Thioether or Ether Linkage via Ruthenium Allenylidene and Vinylidene Complexes
作者:Yi-Jhen Feng、Ji-Xian Lo、Ying-Chih Lin、Shou-Ling Huang、Yu Wang、Yi-Hung Liu
DOI:10.1021/om400742x
日期:2013.11.11
of 1a,c, the presence of the methyl group promotes cyclization reactions and their tandem cyclizations are further induced by MeOH. The reaction of 1a in CH2Cl2 gives the three products 2a–4a. Complex 2a, with a seven-membered thio ring bonded at Cβ of the vinylidene ligand, is formed via a C–Cbondformationbetween two unsaturated groups in moderate yield. Complex 3a is formed via migration of PPh3