Nickel(0) Catalyzed [2+2] Cross-addition of Bicyclo[2.2.1]heptene Derivatives with Electron-deficient Olefins
作者:Hidemasa Takaya、Masashi Yamakawa、Ryoji Noyori
DOI:10.1246/bcsj.55.852
日期:1982.3
cycloaddition with dimethyl maleate proceeds with retention of configuration. Benzonorbornadiene also enters into the 2+2 reaction, while endo-tricyclo[3.2.1.02,4]oct-6-ene, bicyclo[2.2.1]heptene, and 5-methylenebicyclo[2.2.1]heptene are unreactive. Origins of the observed selectivities in the catalyzed reaction are discussed.
在双(丙烯腈)镍(0)或双(1,5-环辛二烯)镍(0)存在下,外三环[3.2.1.02,4]oct-6-烯环加成到丙烯腈和丙烯酸甲酯中,得到抗-和syn-3-cyano-exo,exo-四环[4.3.1.02,5.07,9]癸烷或相应的甲氧基羰基衍生物。与马来酸二甲酯的环加成保持构型。苯并降冰片二烯也进入2+2反应,而内三环[3.2.1.02,4]oct-6-烯、双环[2.2.1]庚烯和5-亚甲基双环[2.2.1]庚烯不反应。讨论了催化反应中观察到的选择性的起源。