The acetone sensitized irradiation of the three spiro [5.5]undeca-1,3-dien-7-ones (1),(2), and (3) leads to two types of annelated bicyclo[3.1.0.]hexen-2-yl ketone products, the structures of which were assigned by n.m.r. spectroscopy and confirmed by X-ray crystallography; the results are interpreted in terms of a substitution-influenced 1,2-acyl shift, involving one or both double bonds, with an
三种螺环[5.5] undeca-1,3-dien-7-ones(1),(2)和(3)的
丙酮敏化辐照导致两种类型的双环退火[3.1.0。] hexen-2退火。 -n-基
酮产物,其结构通过核磁共振光谱确定,并通过X射线晶体学确认;结果以具有
氧杂-二-π-
甲烷类型机理的取代影响的涉及一个或两个双键的1,2-酰基转移来解释。