Synthesis and biological evaluation of 1α,25-dihydroxyvitamin D3 analogues with aromatic side chains attached at C-17
作者:Chao Liu、Guo-Dong Zhao、Xinliang Mao、Tsutomu Suenaga、Toshie Fujishima、Cheng-Mei Zhang、Zhao-Peng Liu
DOI:10.1016/j.ejmech.2014.08.031
日期:2014.10
Two new analogues of the steroid hormone 1α,25-dihydroxyvitamin D3 with aromatic side chains attached at C-17 were designed to investigate their effects on VDR, HL-60 cell differentiation and tumor cell proliferation. These analogues were prepared by the classical photochemical ring opening approach. After the protection of both the 1α- and 3β-hydroxyl in 1α-hydroxydehydroepiandrosterone with TBS groups
甾族激素1α,25-二羟基维生素D 3的两个新类似物设计了在C-17处连接有芳香族侧链的化合物,以研究其对VDR,HL-60细胞分化和肿瘤细胞增殖的影响。这些类似物是通过经典的光化学开环方法制备的。用TBS基团保护1α-羟基脱氢表雄酮中的1α-和3β-羟基,然后用NBS溴化并在γ-可力丁存在下脱溴,得到二烯中间体。形成formation,然后碘氧化,得到乙烯基碘。在催化量的Pd(PPh 3)4存在下,通过将生成的中间体与原位生成的锌试剂与取代的芳基溴化物(CD侧链)进行Negishi偶联,在C-17处引入芳族侧链。。除去TBDMS和MOM保护基团后,进行紫外线照射和随后的热反应,然后在C-17上连接取代苯环的1α,25-(OH)2 -D 3类似物取代C-20和C-21准备好了。在VDR竞争结合测定中,化合物2和3几乎失去了结合能力,并且效力仅为1α,25-二羟基维生素D 3的0.01%和0