The School of Pharmacy, University of Wisconsin, Madison, 53705-2222, USA.
Angew Chem Int Ed Engl. 2011 Aug 22;50(35):8153-6. doi: 10.1002/anie.201103136. Epub 2011 Jul 11.
Rholling in the bicycles: a 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 migration.
铑(I)催化的环异构化反应用于合成含有环庚三烯环的双环化合物,该反应由线性炔烃(见方案;cod=1,5-环辛二烯)引发,经过 1,2-酰氧基迁移、6π电环化、迁移插入和还原消除等步骤。整个过程可以看作是一种新型的分子内[5+2]环加成反应,同时伴有 1,2-酰氧基迁移。