Formation Mechanism of Triketo Cage Compounds from Reaction of Phencyclone with Benzoquinones: Cascade Reaction of Intermolecular [4+2]π and Intramolecular [2+2]π Cycloadditions
作者:Koki Yamaguchi、Masashi Eto、Kazunobu Harano
DOI:10.1248/cpb.c13-00240
日期:——
The [4+2]π cycloadduct (3aa) of phencyclone (1a) and benzoquinone (2a) readily transformed into the corresponding [2+2]π cycloadduct (4aa) during purification. The structure of the triketo cage compound was determined by single crystal X-ray analysis. The structure-reactivity relationships are discussed based on the PM6-calculated energy profiles for the whole photocycloaddition of the [4+2]π cycloadducts