结果表明,用五硫化二磷或Lawesson试剂处理α-氨基酸衍生的二酰胺可为制备5-氨基噻唑提供便利的方法。通过该方法,除了单环5-氨基噻唑19,新的双环5-氨基噻唑衍生物,如4,5,6,7-四氢噻唑并[5,4- b〕吡啶11,5,6,7,8-四氢-4- ħ -噻唑并[5,4- b ]吖庚因7,-4,5,6,7,8,9- hexahydrothiazolo并[5,4- b ]吖辛因16在中等制备到从简单的良好的产率和相关的化合物双酰胺,表明该方法具有广泛的通用性。
In vivo Biological Activity of Antioxidative Aminothiazole Derivatives.
作者:Osamu UCHIKAWA、Kohji FUKATSU、Masahiro SUNO、Tetsuya AONO、Takayuki DOI
DOI:10.1248/cpb.44.2070
日期:——
using simple methods. Condensed 4-aminothiazoles were prepared by the reaction of alpha-bromolactams with thioamides in ethanol and 5-aminothiazole derivatives were obtained by the treatment of 3-(acylamino)lactams with a thiating agent such as phosphorous pentasulfide and Lawesson's reagent in pyridine. In vitro assay of the condensed 5-aminothiazole derivatives showed them to be potent inhibitors
Twenty-four diosgenyl saponins bearing cinnamoyl, carbamido and thiosemicarbazone groups were synthesized concisely. The cytotoxicities of the synthetic compounds on six human caner cell lines were evaluated employing MTT method. Structure-activity relationship could be observed, and two of the synthesized compounds (5c and 5f) exhibited selective inhibition on HeLa and MCF-7 cells, while three of them (5d, 5f and 5h) showed strong inhibition against HT1080. (C) 2012 Elsevier Ltd. All rights reserved.
Natural product-based design, synthesis and biological evaluation of Albiziabioside A derivatives that selectively induce HCT116 cell death
A series of Albiziabioside A coupled substituents of cinnamoyl derivatives were designed and synthesized. The synthesized compounds were screened for anticancer activity against a panel of six human cancer cell lines using a MTT assay. Synthetic derivatives showed excellent selectivity, as they were toxic against only HCT116 cell line. Some compounds exhibited better anti-cancer activity against HCT116 compared to positive controls, such as 5-fluorouracil and Albiziabioside A. Compound 8n was the most active derivative. Importantly, it was also found that the anti-proliferative activity of 8n could be attributed to the induction of cell cycle arrest and apoptosis in HCT116 cells. (C) 2015 Elsevier Masson SAS. All rights reserved.