The seleno-acetal route to 1α-hydroxy-vitamin D analogues: synthesis of 24-oxa-1α-hydroxy-vitamin D3, a useful vitamin D metabolism probe
作者:Martin J. Calverleya、Stephen Strugnell、Glenville Jones
DOI:10.1016/s0040-4020(01)86276-1
日期:1993.1
lithio-demethylseleno-derivative of seleno-acetal 11 with chloromethyl isopropyl ether [shown by NMR to give the (22S)-methylseleno-compound 13a as the major diastereoisomer] is the key reaction in the synthesis of the 24-oxa analogue (MC 1090, 8) of 1α-hydroxyvitamin D3 (4). The metabolism of 8 to calcitroic acid (7) is demonstrated in vitro in a hepatocyte cell (Hep 3B) model. This supports the hypothesis
乙缩醛11的硫代-脱甲基硒代衍生物与氯甲基异丙基醚的烷基化[由NMR显示,以得到(22 S)-甲基硒代化合物13a为主要的非对映异构体]是合成24-氧杂酸酯的关键反应类似物(MC 1090,8 1α羟基d的)3(4)。的代谢8至calcitroic酸(7)证明在体外在肝细胞病毒(Hep 3B)模型。这支持以下假设:8可经历酶促25羟基化类似于活化4,或类似的侧链羟基化反应,但随后以1α,25-二羟基维生素D 3到7缩短了靶细胞侧链的裂解途径。