作者:Deng Jingen、Jiang Yaozhong、Liu Guilan、Wu Lanjun、Mi Aiqiao
DOI:10.1055/s-1991-26617
日期:——
The esters 3a and 3b are conveniently prepared from (+)-ketopinic acid (7,7-dimethyl-2-oxobicyclo[2.2.1]heptane-1-car-boxylate, 1) and are subsequently reduced to afford exo- and endo-2,10-camphanediols [1-(hydroxymethyl)-7,7-dimethylbicyclo [2.2.1]heptan-2-ols, 4a and 4b, respectively] in good overall yield. The alkylation of ester 3a with buyllithium gives only exo-10,10-dibutyl-2,10-camphanediol [exo-1-(1-butyl-1-hydroxypentyl)-7, 7-dimethylbicyclo[2.2.1]heptan-2-ol, 5] in good yield.
酯3a和3b可方便地由(+)-酮品酸(7,7-二甲基-2-氧双环[2.2.1]庚烷-1-羧酸酯,1)制备,随后还原得到外-和内-2,10-冰片二醇[1-(羟甲基)-7,7-二甲基双环[2.2.1]庚烷-2-醇,分别为4a和4b],总收率良好。酯3a与丁基锂的烷基化反应仅以良好收率得到外-10,10-二丁基-2,10-冰片二醇[外-1-(1-丁基-1-羟基戊基)-7,7-二甲基双环[2.2.1]庚烷-2-醇,5]。