Intramolecular cycloadditions of methylenecyclopropanes: A novel chelation effect
作者:William B. Motherwell、Michael Shipman
DOI:10.1016/s0040-4039(00)74499-6
日期:1991.2
In contrast to the palladium catalysed reactions of methylenecyclopropane (1), cyclisation of methylenecyclopropane (7) yields trans fused bicyclo[3.3.0]octanes (8) and (9). Intramolecular chelation by an appended ether unit is proposed to account for the observed selectivities.