Two- and three-component Hantzsch-type cyclocondensation reactions were carried out under thermal conditions using C-glycosylated reagents, namely sugar aldehydes, ketoesters, and enamines. Two different series of 1,4-dihydropyridines bearing C-glycosyl moieties at C4 and C6 were obtained in good to excellent overall yields (61-90%). The asymmetric induction due to carbohydrate residues was also investigated.
在热条件下,使用C-糖苷化试剂(即糖醛、
酮酯和
亚胺)进行了二组分和三组分的汉茨施型环缩合反应。成功获得了两种不同系列的1,4-
二氢吡啶,这些化合物在C4和C6位置上带有C-糖苷基,整体产率良好到优秀(61-90%)。同时也研究了
糖类残基引起的非对称诱导效应。