Irradiation of o-vinylbenzaldehyde 1a affords the oxygen-bridged dimer 7a, presumably, through an initial [π2a+π4s] rearrangement; intermediacy of spiro triene 6 is supported by deuterium labelling experiments which also reveal the reversible nature of the concurrently occurring 1,5-hydrogen shift (1 ⇄ 2).
辐照邻
乙烯基苯甲醛 1a 可以得到氧桥二聚体 7a,这可能是通过最初的[π2a+π4s]重排实现的;螺
三烯 6 的中间产物得到了
氘标记实验的支持,
氘标记实验还揭示了同时发生的 1,5 氢转移(1 ⇄ 2)的可逆性。