Rearrangement of a Mesylate Tropane Intermediate in Nucleophilic Substitution Reactions. Synthesis of Aza-Bicyclo[3.2.1]octane and Aza-Bicyclo[3.2.2]nonane Ethers, Imides, and Amines
作者:Lionel Ogier、Frédéric Turpin、Ronald M. Baldwin、Françoise Riché、Ho Law、Robert B. Innis、Gilles Tamagnan
DOI:10.1021/jo010973x
日期:2002.5.1
Nucleophilic substitution of 2beta-mesyloxymethyl-N-methyl-3beta-p-tolyl-tropane intermediate with alkoxides, metal imides, or amines was found to lead not only to the expected bicyclo[3.2.1]octane (tropane) ether, imide, and amine derivatives but also to unexpected bicyclo[3.2.2]nonane derivatives. When alkoxides were used as nucleophile, only the rearranged bicyclo[3.2.2]nonane structure was obtained
发现2β-甲氧基氧基甲基-N-甲基-3β-对甲苯基-托烷中间体被醇盐,金属酰亚胺或胺类亲核取代不仅导致预期的双环[3.2.1]辛烷(托烷)醚,酰亚胺,胺衍生物,但也有意想不到的双环[3.2.2]壬烷衍生物。当将醇盐用作亲核试剂时,仅获得重排的双环[3.2.2]壬烷结构,而使用胺或酰亚胺作为亲核试剂则提供了两种结构的混合物。通过NMR分析确定双环[3.2.2]壬烷结构。