Enantioselective Cycloisomerization of 1,6-Enynes to Bicyclo[3.1.0]hexanes Catalyzed by Rhodium and Benzoic Acid
作者:Koji Masutomi、Keiichi Noguchi、Ken Tanaka
DOI:10.1021/ja504048u
日期:2014.5.28
(S)-DTBM-Segphos complex and benzoic acid catalyze the enantioselectivecycloisomerization of 1,6-enynes, possessing carbonyl groups at the enyne linkage, to 2-alkylidenebicyclo[3.1.0]hexanes. The present cycloisomerization may involve site selective γ-hydrogen elimination. The one-pot enantioselectivecycloisomerization and lactonization of 1,6-enynes, leading to bicyclic lactones, has also been accomplished