Methylenecyclopentane annulation via formal [3 + 2] cycloaddition reaction
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.