Photochemical Reactions. 129th Communication. Photochemistry of a conjugated diepoxydiene: Product formationvia carbonyl ylide and carbene intermediates with participation of neighbouring epoxy functions
作者:Norbert Bischofberger、Bruno Frei、Oskar Jeger
DOI:10.1002/hlca.19830660603
日期:1983.9.21
propyne. The carbene X, showing behaviour typical of vinyl carbenes, undergoes addition to the adjacent double bond furnishing the cyclopropene 11. The carbene XI, however, undergoes an insertion reaction into the neighbouring oxirane C,C-bond leading to the oxetene (E)-21 which can be isolated at −78°, but at room temperature is rapidly transformed to the aldehyde 10. On triplet excitation (acetone