Preparation and Crystal Structure of Two Bicyclo[1.1.0]butan-2-ones:A Hybrid Oxyallyl-Cyclopropanone Motif

摘要

Oxyallyls 1 are proposed intermediates in a number of organic reactions.However,only one report on the direct observation of an oxyallyl has appeared,involving low-temperature matrix photolysis generation and UV-visible detection.However,we show in this communication that bicyclobutanones have a hybrid structure with some oxyallyl "character",and in particular,that some bicyclobutanones can now be isolated as crystalline solids suitable for single-crystal X-ray diffraction study.