Cyclization by Catalytic Ruthenium Carbene Insertion into C sp 3H Bonds
作者:Fermín Cambeiro、Susana López、Jesús A. Varela、Carlos Saá
DOI:10.1002/anie.201107344
日期:2012.1.16
A novel tandem Ru‐catalyzed carbene addition to terminal alkynes/insertion into CHbonds in alkynyl acetals, ethers, and amines has been accomplished under mild reaction conditions (see scheme; TMS=trimethylsilyl). This cascade provides an efficient approach to form complex spiro and fused bicyclic structures by 1,5‐ and 1,6‐hydride shift/cyclization sequences from vinylcarbene Ru intermediates.