Intramolecular photocycloaddition of 1,3-dienes with 2-pyridones
作者:Scott McN Sieburth、Fangning Zhang
DOI:10.1016/s0040-4039(99)00515-8
日期:1999.4
Intramolecular photocycloaddition of a 2-pyridone and an acyclic 1,3-diene leads to formation of an apparent [2 + 2] product. This is presumably formed by an initial [4 + 4] cycloaddition followed by Cope rearrangement of the highly strained product. The isolated 1,2-divinylcyclobutane undergoes a Cope rearrangement at 120 °C to give a polycyclic cyclooctadiene.