Synthesis of 3,4,5-Trisubstituted Isoxazoles from Morita-Baylis-Hillman Acetates by an NaNO<sub>2</sub>/I<sub>2</sub>-Mediated Domino Reaction
作者:Shashikant U. Dighe、Sushobhan Mukhopadhyay、Shivalinga Kolle、Sanjeev Kanojiya、Sanjay Batra
DOI:10.1002/anie.201504529
日期:2015.9.7
3‐nitro‐5‐(aryl/alkyl)isoxazole‐4‐carboxylates is described. In a cascade event, initial Michael addition of NaNO2 to the MBH acetate furnishes the allylnitro intermediate which undergoes I2‐catalyzed oxidative α‐CH nitration of the nitromethyl subunit followed by [3+2] cycloaddition to afford the title compounds. Structural elaborations of these highly substituted isoxazoles by SNAr reactions and
本文描述了一种有效的NaNO 2 / I 2介导的Morita-Baylis-Hillman(MBH)乙酸盐单酯转化为3-硝基--5-(芳基/烷基)异恶唑-4-羧酸烷基酯的方法。在一个级联事件,初始迈克尔加成纳米2到MBH醋酸配料其经历我的allylnitro中间2催化的氧化α-C 的硝基甲基亚基h的硝化,接着[3 + 2]环加成,得到标题化合物。这些高度取代的异恶唑通过S N Ar反应和氢解进行结构精制可以得到有用的产品。
Antileishmanial assessment of isoxazole derivatives against <i>L. donovani</i>
作者:Sushobhan Mukhopadhyay、Dinesh S. Barak、R. Karthik、Sarvesh K. Verma、Rabi S. Bhatta、Neena Goyal、Sanjay Batra
DOI:10.1039/d0md00083c
日期:——
The antileishmanial activity of a variety of 3-nitro and 3-amino-isoxazoles against promastigote and amastigote stages of L. donovani is described.
描述了多种3-硝基和3-氨基异噁唑对唐氏利什曼原虫旋毛虫和无毛虫阶段的抗利什曼活性。
Efficient Transformation of Alkyl 3-nitro-5-(aryl/alkyl)isoxazole-4-carboxylates into 3-amino- and 3-hydrazinyl-5-aryl/alkyl-isoxazole-4-carboxylates in Aqueous Solution
作者:Sushobhan Mukhopadhyay、Dinesh S. Barak、Ilesha Avasthi、Sanjay Batra
DOI:10.1002/adsc.201700881
日期:2017.11.23
An efficient protocol for transforming alkyl 3‐nitro‐5‐(aryl/alkyl)isoxazole‐4‐carboxylates into 3‐amino‐ and 3‐hydrazinyl‐5‐aryl/alkyl‐isoxazole‐4‐carboxylates is described. The reaction that is carried out in aqueous acetonitrile solution generally afford the products without any chromatographic purification. Investigations with the substrate scope reveal that this protocol is compatible only when