作者:M. Regitz、H. Eckes
DOI:10.1016/s0040-4020(01)97682-3
日期:1981.1
The photolysis of 1 produces the carbene 2, which is transformed into the short lived phosphene 4 by phenyl migration. With the α, β-unsaturated ketones 6a–d in a [2+2] cycloaddition 4 yields the 1,2λ5-oxaphos-phetanes 7a–d The heterocycles partially undergo a photofragmentation, which produces the olefines 9a–d and the heterocumulene 8. If 4 is generated from 1 under thermal conditions in the presence
1的光解产生卡宾2,卡宾2通过苯基迁移转化为短寿命的膦4。与α,β不饱和酮图6a-d中一个的[2 + 2]环加成4个产率1,2λ 5 -oxaphos-phetanes 7A-D的杂环部分经过光碎片化,其产生的烯烃图9a-d和杂累8。如果在存在6a–c的热条件下从1生成4,也观察到四元环的形成和断裂;另外4与杂1,3-二烯6a-c进行[4 + 2]环加成,生成15a-c。该行为对应于具有6a的羰基类似物二苯基-乙烯酮(经由β-内酯16例如17形成CO 2和9a)。