作者:Yoshinori Takahashi、Keiji Tanino、Isao Kuwajima
DOI:10.1016/0040-4039(96)01283-x
日期:1996.8
A new method for methylenecyclopentane annulation via formal [3+2] cycloaddition reaction was developed. Under the influence of Lewis acids, enol ethers and vinylsulfides were treated with I-(alkylthio)-2-(trimethylsilylmethyl)allyl esters 1a or 1b to afford methylenecyclopentanes in good yields. The reaction proceeds with almost complete regioselectivity as well as high stereoselectivity.
开发了一种通过正式的[3 + 2]环加成反应环化亚甲基环戊烷的新方法。在路易斯酸的影响下,用1-(烷硫基)-2-(三甲基甲硅烷基甲基)烯丙基酯1a或1b处理烯醇醚和乙烯基硫化物,以高收率得到亚甲基环戊烷。反应以几乎完全的区域选择性以及高的立体选择性进行。