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
自行车中的Rholling:铑(I)催化的环异构化用于从直链烯炔合成含有环庚三烯环的双环化合物(参见方案;cod=1,5-环辛二烯),建议通过1,2-酰氧基迁移进行, 6 π 电环化、迁移插入和还原消除。整个过程可以被视为一种新颖的分子内[5+2]环加成反应,并伴有 1,2-酰氧基迁移。