Formal [6+4] cycloaddition of a dicobalt acetylene complex with furan derivatives
作者:Koichiro Dota、Tadashi Shimizu、Shoji Hasegawa、Masaaki Miyashita、Keiji Tanino
DOI:10.1016/j.tetlet.2010.12.063
日期:2011.2
complex possessing a benzoyloxy group and an allylsilane moiety reacted with furan to give a 11-oxabicyclo[6.2.1]undec-9-ene derivative. On treatment with iodine, the cycloadduct underwent decomplexation followed by rearrangement of the oxygen bridge to afford a 11-oxabicyclo[5.3.1]undeca-1,5-diene derivative.
在正式的[6 + 4]环加成反应的基础上,已经开发出一种有效的用氧桥构建十元碳环的方法。在EtAlCl 2的影响下,具有苯甲酰氧基和烯丙基硅烷部分的二钴二羰基六羰基乙炔配合物与呋喃反应,生成11-氧杂双环[6.2.1]十一烷基-9-烯衍生物。用碘处理时,使环加合物分解并随后重新排列氧桥,得到11-氧杂双环[5.3.1] undeca-1,5-二烯衍生物。