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-dihydroxyvitaminD3 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
This invention relates to novel bridged a hafnium transition metal metallocene catalyst compounds having two indenyl ligands substituted at the 4 positions with a C
1
to C
10
alkyl, where the 3 positions are hydrogen (assuming the bridge position is counted as the one position) and the bridging atom is carbon or silicon which is incorporated into a cyclic group comprising 3, 4, 5, or 6 silicon and/or carbon atoms that make up the cyclic ring.