Norbornadiene and 1,2-bismethoxycarbonylcyclobutadiene furnish a novel heptacyclic system 3(whose X-ray crystal structure has been determined)and an annulated pterodactylane derivative 4 in a single step.
降
冰片二烯和1,2-双甲氧基羰基
环丁二烯可在一个步骤中提供一个新颖的七环系统3(已确定其X射线晶体结构)和一个环翼手龙衍
生物4。