A series of novel fusidic acid (FA) derivatives were synthesized and screened for their in vitro cytotoxicity against the Hela, U87, KBV and MKN45 cancer cell lines. Selected FA derivatives with anti-tumor activity were firstly identified including compound 4, which exhibited good anti-proliferative activity with IC50 values in the range of 1.26–3.57 μM. Further research revealed that compound 4 induced
合成了一系列新颖的夫西地酸(FA)衍生物,并筛选了它们对Hela,U87,KBV和MKN45癌细胞系的体外细胞毒性。具有抗肿瘤活性的选择FA衍生物首先鉴定包括化合物4,其显示出良好的抗增殖活性带IC 50倍中的1.26-3.57的范围内的值 μ M.进一步的研究表明,化合物4诱导的Hela细胞通过增加经历细胞凋亡在细胞分G的比率0 / G 1个通过在从1以剂量依赖的方式降低新合成的蛋白质至10相 μ M.化合物4还显示出对Hela细胞的异种移植肿瘤良好的体内抗肿瘤活性,并且没有明显的毒性。这项研究突出了在FA的3-OH位置引入中等长度的氨基末端基团以增强其抗肿瘤活性的优势,并表明化合物4为将来设计更有效的衍生物提供了一个起点。
SUBSTITUTED TARAXASTANES USEFUL FOR TREATING VIRAL INFECTIONS
申请人:BRADBURY Barton James
公开号:US20070197646A1
公开(公告)日:2007-08-23
Substituted taraxastanes useful for treating viral infections, are provided herein. Thus, in a first aspect, the invention provides compounds of Formula I
and the pharmaceutically acceptable salts thereof, wherein the variables R
1
, R
2
, and X are defined herein. The compounds described herein are thought to act by inhibiting retroviral maturation, including maturation of encapsulated retroviruses viruses, such as the HIV viruses, HIV-1 and HIV-2. Pharmaceutical compositions comprising such compounds of Formula I are included herein. Methods of using such compounds to treat human patients infected with an HIV virus and reducing the mortality of AIDS are also provided herein.
Phosphine-Catalyzed Doubly Stereoconvergent γ-Additions of Racemic Heterocycles to Racemic Allenoates: The Catalytic Enantioselective Synthesis of Protected α,α-Disubstituted α-Amino Acid Derivatives
作者:Marcin Kalek、Gregory C. Fu
DOI:10.1021/jacs.5b05528
日期:2015.7.29
specifically, that a chiral phosphepine can catalyze the stereoconvergent γ-addition of a racemic nucleophile to a racemic electrophile; through the choice of an appropriate heterocycle as the nucleophilic partner, this new method enables the synthesis of protected α,α-disubstituted α-amino acidderivatives in good yield, diastereoselectivity, and enantioselectivity.