combination with 20S- and 20R-isomers were prepared and tested for their in vitro biological activities. All of the synthesized analogs showed 0.5-140% of the activity of the natural hormone in binding to the vitamin D receptor (VDR). When compared with the transcriptional activity of C-2 or C-20 isomeric pairs of the 22-thia analogs, the 20S-isomers 2-11a were more potent than the 20R-isomers 2, 3, 8-11b,
最近,我们发现16-ene-22-thia-26,27-dimethyl-19-norvitamin D(3)类似物1a(n = 2,3)的活性是天然激素1alpha,25-dihydroxyvitamin的20倍D(3)在转录活性方面。为了进一步研究1a,b的A环修饰对
生物活性的影响,结合使用在C-2处带有羟基乙氧基,羟基亚乙基或甲基的新型22-thia-19-norvitamin D类似物2-11制备了具有20S-和20R-异构体的SNP,并测试了它们的体外
生物学活性。所有合成的类似物都表现出0.5-140%的天然激素与
维生素D受体(VDR)结合的活性。与22-thia类似物的C-2或C-20异构体对的转录活性相比,20S异构体2-11a比20R异构体2、3、8-11b更有效,和2β-羟基乙氧基,2E-羟基亚乙基和2α-甲基-2β-羟基-22-
硫杂异构体显示出比其对应的对等异构体更高的