作者:John E. Ezcurra、Harold W. Moore
DOI:10.1016/s0040-4039(00)73703-8
日期:1993.9
Selected 3-alkylidene(and benzylidene)-4-allenylcyclobutenes were shown to undergo an unusual thermal ring expansion to o-quinodimethanes and thus to benzocyclobutenes upon electrocyclic ring closure. The mechanism of this rearrangement is envisaged to involve ring opening of the starting cyclobutenes to the corresponding octa-1,2,4,6,7-pentaenes which lead to the quinodimethanes upon ring closure
所选的3-亚烷基(和亚苄基)-4-烯基环丁烯显示出不寻常的热环扩环,生成邻喹啉甲烷,从而在电环闭环后膨胀成苯并环丁烯。设想这种重排的机理涉及将起始环丁烯开环成相应的八-1,2,4,6,7-戊烯的开环,所述八-1,2,4,6,7-戊烯在闭环时产生喹啉二甲烷。