Interception of a Rautenstrauch Intermediate by Alkynes for [5+2] Cycloaddition: Rhodium-Catalyzed Cycloisomerization of 3-Acyloxy-4-ene-1,9-diynes to Bicyclo[5.3.0]decatrienes
作者:Xing-zhong Shu、Suyu Huang、Dongxu Shu、Ilia A. Guzei、Weiping Tang
DOI:10.1002/anie.201103136
日期:2011.8.22
rhodium(I)‐catalyzed cycloisomerization for the synthesis of bicyclic compounds containing a cycloheptatriene ring from linear alkenynes (see scheme; cod=1,5‐cyclooctadiene) is proposed to proceed through 1,2‐acyloxy migration, 6 π electrocyclization, migratory insertion, and reductive elimination. The overall process can be viewed as a novel intramolecular [5+2] cycloaddition with concomitant 1,2‐acyloxy