为了研究维生素 D 前维生素形式的生物学特征,我们合成了在 A 环上带有 2-羟基亚乙基部分的 19-nor-1α,25-二羟基前维生素 D3 的新类似物。使用 A 环烯炔合成子和 CD 环/侧链乙烯基三氟甲磺酸酯之间的 Sonogashira 偶联,通过会聚合成制备目标化合物。我们已经证明了莽草酸作为合成 A 环前体的起始材料的多功能性。评估了对维生素 D 受体 (VDR) 和人类维生素 D 结合蛋白 (hDBP) 的结合亲和力,以及 MCF-7 细胞的抗增殖活性。
Synthesis and biological activity of previtamin D3 analogues with A-ring modifications
摘要:
Synthesis of two novel 6-s-cis analogues of 1 alpha,25-dihydroxyvitamin D-3 are described using shikimic acid and its 4-epi isomer as versatile chiral starting materials. These derivatives contain a 2b-(3'-hydroxypropoxy) moiety or a 2 beta,3 beta-epoxy group into 1 alpha,25-(OH)2-19-nor-pre-D-3. The synthesized analogues were found to be not suitable for binding to the vitamin D receptor and showed weak binding affinity toward the vitamin D-binding protein. The new derivatives failed to inhibit cell proliferation. (C) 2008 Elsevier Ltd. All rights reserved.