opposite sides (b) of the ring skeleton. On heating, the mixtures of diastereomeric norbornene derivatives 8 and 9 underwent retrodiene decomposition: cyclopentadiene split off to yield the pyrimido[2,1-a]phthalazine 14 containing a cis-fused cycloalkane ring. The reaction of 4 with the aroylbenzoic acid 15 furnished the benzologue 19 directly, while, after isolation from the reaction mixture of 1 and
的反应中的顺式-2- p -toluoylcyclohexanecarboxylic酸1与内,内切-或外,外切-3-
氨基二环[2.2.1]
庚烷和-庚-5-烯-2-碳酰
肼2,4和3,5产生部分饱和亚甲基桥接
酞嗪[1,2- b ]
喹唑啉酮非对映异构体6a–6b,7a–7b,8a–8b和9a–9b,以及含有反式缩合的
酞菁[1,2- b ]
喹唑啉二酮10-13
环己烷环。分离产物后,通过以下方法建立结构:核磁共振方法。非对映异构体6–9的环状碳的构型不同:与它们连接的氢位于环骨架的同一侧(a)或成对相对的侧(b)。加热时,非对映
降冰片烯衍
生物8和9的混合物经历逆二烯分解:
环戊二烯分离得到含顺式稠合的
嘧啶并[2,1- a ]邻苯二甲酰胺14环烷环。的反应4与aroylbenzoic酸15提供的benzologue 19直接,同时,从该反应混合物中分离后1和5,并在加热的同时,20导致21含有饱和反