Novel 2α-methyl-, 2α-(3-hydroxypropyl)- and 2α-(3-hydroxypropoxy)-substituted 25-dehydro-1α-hydroxyvitamin D3-26,23-lactone derivatives were efficiently synthesized via Reformatsky type allylation and palladium-catalyzed alkenylative cyclization processes, and their biological activities were evaluated. Introducing functional groups into the 2α-position of the vitamin D3-26,23-lactones resulted in remarkable enhancement of their antagonistic activity on vitamin D receptor (VDR).
新型2α-甲基、2Îα-(3-羟基丙基)和2Îα-(3-羟基丙氧基)取代的25-脱氢-1Îα-羟基
维生素D3-26,23-内酯衍
生物通过Reformatsky型烯丙基化和
钯催化的烯烃化环化过程被高效合成,并对其
生物活性进行了评估。向
维生素D3-26,23-内酯的2Îα位引入功能团显著提高了它们对
维生素D受体(VDR)的拮抗活性。