Design and synthesis of novel 1,25-dihydroxyvitamin D3 analogues having a spiro-oxetane fused at the C2 position in the A-ring
作者:Toshie Fujishima、Takato Nozaki、Tsutomu Suenaga
DOI:10.1016/j.bmc.2013.06.032
日期:2013.9
Four structurally novel stereoisomeric analogues of 1,25-dihydroxyvitamin D3 (3a–d) bearing a spiro-oxetane fused at the C2 position of the A-ring have been designed and synthesised in a convergent manner. The requisite A-ring enyne precursors (13a,b) for the vitamin D analogues (3a,b) and (3c,d), respectively, were synthesised from pentaerythritol according to an eleven-step procedure. Preliminary
设计并合成了四种结构新颖的1,25-二羟基维生素D 3(3a - d)的立体异构体,它们在A环的C2位置稠合了螺-氧杂环丁烷。维生素D类似物(3a,b)和(3c,d)的必需的A环烯炔前体(13a,b)分别根据十一步程序由季戊四醇合成。使用牛胸腺维生素D受体(VDR)对类似物进行的初步生物学评估表明,掺入螺-氧杂环丁烷部分而不是宝石在C 2位的-二甲基对VDR亲和力具有有益的作用。