5(4<i>H</i>)-Oxazolones as Novel Antitubercular Agents: Synthesis, Characterisation and Structure Activity Study
作者:K. P. Suhasini、Praveen K. Chintakindi、K. Chaguruswamy、Y. L. N. Murthy
DOI:10.1002/jccs.201500111
日期:2015.10
In search of novel anti tubercular agents, a series of twelve 4‐(substituted benzylidene)‐2‐p‐tolyloxazol‐5(4H)‐ones (5a–5l) has been synthesized, characterised and subjected to evaluate their antitubercularactivity for the first time against Mycobacterium tuberculosis H37Rv (ATCC 27294). The out‐put of these studies disclosed that all the synthesized target molecules of the series displayed good
Catalytic aza-Wittig Reaction of Acid Anhydride for the Synthesis of 4<i>H</i>-Benzo[<i>d</i>][1,3]oxazin-4-ones and 4-Benzylidene-2-aryloxazol-5(4<i>H</i>)-ones
copper-catalyzed reduction of phosphine oxide was used and found effective for this transformation. Additionally, the one-pot catalyticaza-Wittig reaction of carboxylic acids was achieved. Furthermore, NMR experiments and Hammett plot recorded the process of catalyticaza-Wittig reaction of anhydride, which provides direct proof that the copper-catalyzed reduction of waste phosphine oxide is the key step
与醛,酮,酰胺和酯的aza-Wittig反应相比,酸酐的aza-Wittig反应总是被忽略,这应该是Wittig反应的重要组成部分。在这里,酸酐的aza-Wittig反应和酸酐的aza-Wittig催化反应均以高收率开发,这为合成4 H-苯并[ d ] [1,3]恶嗪-4-酮和4-亚苄基-2-芳基恶唑-5(4 H)-那些。使用了铜催化的氧化膦还原的策略,发现该策略对这种转化有效。另外,实现了羧酸的一锅催化的氮杂-维蒂希反应。此外,NMR实验和Hammett曲线记录了酸酐的催化氮杂-维蒂希反应过程,这直接证明了铜催化的废氧化膦的还原是该转化过程中的关键步骤。
A facile synthesis of 2-alkyl-3-α-carboxy-α-styryl/heterylvinyl quinazolin-4(3H)-ones and 3-arylidene/heterylmethylidene-4-aroyl-1H-[1,4]benzodiazepine-2,5(3H,4H)-diones and their transformation into novel heterocyclyl and heterocyclo analogues
作者:Poonam Gupta、Archana Sharma、R. L. Sharma
DOI:10.1002/jhet.756
日期:2012.1
formation of two entirely different heterocyclic systems, differently substituted quinazoline compounds, 2‐methyl‐/2‐ethyl‐3‐α‐carboxy‐α‐styryl‐/β‐heteryl‐α‐carboxyvinyl‐quinazolin‐4(3H)‐ones 3a–3e and 3′a–3′e and differently substituted 1,4‐benzodiazepine compounds, 3‐arylidene‐/heteryl methylidene‐4‐aroyl‐1H‐[1,4]benzodiazepine‐2,5(3H,4H)‐diones 7a–7e and 7′a–7′e. Compounds 3a–3e and 3′a–3′e have been converted