The Methyl Group as a Source of Structural Diversity in Heterocyclic Chemistry: Side Chain Functionalization of Picolines and Related Heterocycles
作者:Victor Mamane、Emmanuel Aubert、Yves Fort
DOI:10.1021/jo071209z
日期:2007.9.1
The reaction of 2-picoline at the methyl group with NDA and KDA followed by dimethyldisulfide trapping furnished, respectively, dithioacetals and trithioortho esters with high selectivity. The method was successfully applied to other methyl-substituted pyridines, quinolines, and pyrazines. Dithioketals were prepared by a one-pot procedure involving the reaction of metalated 2-picoline with 2 equiv
甲基上的2-甲基吡啶与NDA和KDA的反应,然后进行二甲基二硫键合捕集,分别提供了高选择性的二硫缩醛和三硫原酸酯。该方法已成功应用于其他甲基取代的吡啶,喹啉和吡嗪。通过一锅法制备二硫代缩酮,该一锅法包括使金属化的2-甲基吡啶与2当量的二甲基二硫化物反应,然后用第二亲电试剂原位捕获。在汞盐的存在下或在氧化条件下,所有产生的硫代取代的化合物均有效地转化为其他官能团,包括醛,酮,缩酮,硫醇酯,原酸酯和酯。