Synthesis of iminomethano-dibenzo[a,e]cyclooctenes by transannular formation and cleavage of isoxazolidines
作者:Robert W Carling、Paul D Leeson
DOI:10.1016/s0040-4039(00)88495-6
日期:1988.1
Regioselective formation of the 7-azabicyclo[4,2,2]decanone (4) was accomplished by reaction of hydroxylamine with the enone (10) and subsequent reduction of the isoxazolidine adduct (11); intramolecular nitrone cycloaddition of (19) gave a 2:1 mixture of the regioisomers (17) and (18) which were reduced to give the bridgehead methylated, -hydroxylated, [3,3,2] and [4,2,2] iminomethano compounds (5) and
7-氮杂双环[4,2,2]癸烷(4)的区域选择性形成是通过使羟胺与烯酮(10)反应,然后还原异恶唑烷加合物(11)来完成的;(19)的分子内硝基环加成反应得到区域异构体(17)和(18)的2:1混合物,还原后得到桥头甲基化,-羟基化,[3,3,2]和[4,2,2]亚氨基甲基化合物(5)和(6)。