本文中,我们报道了从β-甲酰基酰胺与炔烃的高收率反应中合成一类新型的取代的[17,16- b ]吡啶(吡啶类固醇)。优化的反应方案扩展到无环和环状β-甲酰胺,以提供非甾体吡啶。对前列腺癌PC-3细胞进行所有化合物的细胞存活测定,其中3-羟基-5-en-2′,3′-二甲乙氧基-雄酮[17,16- b ]吡啶显示出最高的细胞毒活性。相差显微镜和流式细胞术研究显示了在3-hydroxy-5-en-2',3'-dicarbethoxy-androst [17,16- b ]吡啶和阿比特龙处理的PC-3细胞中凋亡的显着形态学特征。3-hydroxy-5-en-2',3'-dicarbethoxy-androst [17,16-b ]吡啶诱导前列腺癌PC-3细胞中G 2 / M期细胞周期停滞。3-羟基-5-en-2',3'-二碳乙氧基-雄酮[17,16- b ]吡啶和阿比特龙通过激活caspases-
A facile synthesis of pyrazolo[1,5-a]pyrimidine and benzimidazo[1,2-a]pyrimidine annulated steroids is described from the novel reaction of β-formyl enamides with amino pyrazoles, indazoles and benzimidazoles. Several of the products exhibited fluorescence properties with high quantum yields.
从β-甲酰胺基与氨基吡唑,吲唑和苯并咪唑的新型反应中,可轻松合成吡唑并[1,5- a ]嘧啶和苯并咪唑并[1,2- a ]嘧啶环化的类固醇。几种产品显示出具有高量子产率的荧光性质。
A facile 1,5-rearrangement of β-formylenamides and cleavage of esters catalysed by Pseudomonas fluorescens
β-Formylenamides undergo a facile 1,5-rearrangement of their N-acetyl groups under the influence of the soil bacterium Pseudomonas fluorescens to afford β-acetoxyenones in good yields. Further, the soil microorganism efficiently cleaves steroidal and non-steroidal acetates to alcohols.
A Microwave-Assisted Facile One-Pot Synthesis of Annelated Pyridines from β-Formyl Enamides via Henry Reaction
作者:Romesh C. Boruah、Apurba Chetia、Moanochet Longchar、Kushal C. Lekhok
DOI:10.1055/s-2004-825595
日期:——
The base-catalysed solid phase condensation of β-formyl enamides with nitromethane under microwave irradiation afforded a novel one-pot synthesis of pyridines via Henry reaction.
A facile synthesis of annelated pyridines from β-formyl enamides under microwave irradiation
作者:Utpal Sharma、Shahadat Ahmed、Romesh C Boruah
DOI:10.1016/s0040-4039(00)00405-6
日期:2000.4
The condensation of beta-formyl enamides with cyanomethylenes under microwave irradiation is catalysed by basic alumina to afford fused pyridines in excellent yields. (C) 2000 Elsevier Science Ltd. All rights reserved.
A Convenient Preparation of <i>N</i>-Acyl-1-aza-1,3-diene from β-Formylenamide and Its Utility in Inverse Electron Demand Diels−Alder Reactions
作者:Romesh C. Boruah、Shahadat Ahmed、Utpal Sharma、Jagir S. Sandhu