The synthesis of 17-alkoxycarbonyl- and 17-carboxamido-13α-estra-1,3,5(10),16-tetraene derivatives via palladium-catalyzed carbonylation reactions
作者:Péter Ács、Attila Takács、Antal Szilágyi、János Wölfling、Gyula Schneider、László Kollár
DOI:10.1016/j.steroids.2008.02.002
日期:2008.7
17-Alkoxycarbonyl- and 17-carboxamido-13alpha-estra-1,3,5(10),16-tetraenes were synthesized from the 17-iodo-13alpha-estra-1,3,5(10),16-tetraene derivative in palladium-catalyzed alkoxycarbonylation and aminocarbonylation reactions, respectively. The synthesis of the 17-iodo-16-ene derivative, used as substrate, is based on the transformation of the 17-keto derivative (epiestrone methyl ether) to hydrazone
从 17-iodo-13alpha-estra-1,3,5(10),16-tetraene 衍生物合成了 17-Alkoxycarbonyl-和 17-carboxamido-13alpha-estra-1,3,5(10),16-tetraenes分别在钯催化的烷氧基羰基化和氨基羰基化反应中。用作底物的 17-iodo-16-ene 衍生物的合成基于将 17-酮衍生物(表雌酮甲基醚)转化为腙,在碱存在下用碘处理腙 (1, 1,3,3-四甲基胍)。不仅使用简单的烷基/芳基胺,而且使用氨基酸甲酯作为 N-亲核试剂,都以良好的收率(高达 88%)获得了 17-甲酰胺。在烷氧基羰基化中使用醇作为 O-亲核试剂产生相应的 17-酯;然而,只有使用甲醇才能获得合成收益。