文摘
Photochemical oxa-di-蟺-methane rearrangement of bicyclo[3.2.1]octanoid scaffolds affords multifunctional, donor鈥揳cceptor cyclopropanes. A related photochemical reaction of an iminium ether substrate uncovered an unprecedented aza-di-蟺-methane rearrangement of a 尾,纬-unsaturated iminium. Donor鈥揳cceptor cyclopropanes have been evaluated as substrates for reactions generating several new chemotypes.