Highly potent cell differentiation-inducing analogues of 1α,25-dihydroxyvitamin D3: synthesis and biological activity of 2-methyl-1,25-dihydroxyvitamin D3 with side-chain modifications
作者:Toshie Fujishima、Liu Zhaopeng、Katsuhiro Konno、Kimie Nakagawa、Toshio Okano、Kentaro Yamaguchi、Hiroaki Takayama
DOI:10.1016/s0968-0896(00)00267-4
日期:2001.2
25-dihydroxyvitamin D3 (6: KH-1060) were convergently synthesized. Preparation of the CD-ring portions with modified side chains of 5 and 6, followed by palladium-catalyzed cross-coupling with the A-ring enyne synthons (20a-d), (3S,4S,5R)-, (3S,4R,5R)-, (3S,4S,5S)- and (3R,4R,5S)-3,5-bis[(tert-butyldimethylsilyl)oxy]-4-methyloct-1-en-7-yne, afforded two sets of four A-ring stereoisomers of 20-epi-2,22-dimethyl-1
20-epi-22R-甲基-1α,25-二羟基维生素D3(5)和20-epi-24,26,27-trihomo-22-oxa-1alpha,25-二羟基维生素D3的八个2-甲基取代的类似物(6: KH-1060)聚合合成。制备具有5和6修饰侧链的CD环部分,然后与A环烯炔合子(20a-d),(3S,4S,5R)-,(3S,4R)进行钯催化的交叉偶联,5R)-,(3S,4S,5S)-和(3R,4R,5S)-3,5-双[(叔丁基二甲基甲硅烷基)氧基] -4-甲基辛-1-烯-7-炔基组的四个20-epi-2,22-二甲基-1,25-二羟基维生素D3(7a-d)和20-epi-24,26,27-trihomo-2-methyl-22-oxa-的A环立体异构体1,25-二羟基维生素D3(8a-d)。根据与天然激素相比对维生素D受体(VDR)的亲和力和HL-60细胞分化诱导活性的活性,评估了杂交类似物的生物学特性。