Convergent Approaches and Biological Activity of C1 and/or C3 Mono or Diamino Derivatives of 1α,25‐Dihydroxy‐19‐
<i>nor</i>
‐vitamin D
<sub>3</sub>
. Key Enzymatic Desymmetrization of A‐Ring Synthon Precursor
novel 19-nor-1α,25-dihydroxyvitamin D3 derivatives modified at C1 and/or C3 with an amino group were synthesized to study the influence of the substitution of one or both hydroxyl groups of A-ring by amino groups on the affinity for vitaminD receptor (VDR) and vitaminD binding protein (hDBP), and also on the antiproliferative activity. The A-ring precursors were prepared from cis,cis-1,3,5-cyclohexanetriol
合成了三种在 C1 和/或 C3 处用氨基修饰的新型 19 - nor -1α,25-二羟基维生素 D 3衍生物,以研究氨基取代 A 环的一个或两个羟基对亲和力的影响用于维生素 D 受体 (VDR) 和维生素 D 结合蛋白 (hDBP),以及抗增殖活性。A 环前体由顺式制备,顺式-1,3,5-环己烷三醇应用洋葱假单胞菌脂肪酶催化的前手性 1,3-二醇的去对称化反应作为关键步骤。非对映异构体的结构解析通过 NMR 光谱明确指定。