Novel polycyclic aromatic hydrocarbons by intramolecular diels-alder reaction: from lepidopterenes to benzenobenzopentaphenes via dianthrylethanes
作者:Hans-Dieter Becker、Kjell Andersson
DOI:10.1016/s0040-4020(01)87570-0
日期:1986.1
effect of the substituent (methyl, formyl, cyano, benzoyl) on the 4+2 cycloreversion has been studied. Benzoyllepidopterene was thermally converted into benzoyldianthrylethane whose photochemical isomerization involving the excited triplet state results in an intramolecular Diels-Alder reaction. The biacetyl-sensitized photochemical isomerization of the parent 1,2-di(9-anthryl)ethane, followed by dehydrogenation
已经合成了一系列的单取代的鳞翅目烯,并且研究了取代基(甲基,甲酰基,氰基,苯甲酰基)对4 + 2环还原的影响。苯并蝶蝶烯被热转化为苯甲酰基二蒽乙烷,其光化学异构化涉及激发的三重态导致分子内Diels-Alder反应。母体1,2-二(9-蒽基)乙烷的联乙酰敏化光化学异构化,然后用DDQ脱氢导致形成苯甲酰苯并五苯环体系。