Low melting mixture glycerol:proline as an innovative designer solvent for the synthesis of novel chromeno fused thiazolopyrimidinone derivatives: An excellent correlation with green chemistry metrics
作者:Priyanka P. Mohire、Dattatray R. Chandam、Reshma B. Patil、Ajinkya A. Patravale、Jai S. Ghosh、Madhukar B. Deshmukh
DOI:10.1016/j.molliq.2019.03.058
日期:2019.6
expansion of proficient and environmentallybenign synthetic protocols has engrossed increasing attention in recent organic syntheses in view of the mounting concern over the environment. As part of this green concept, our group designed novel LTTM by using Glycerol and proline (1:1) at reflux condition, and effectiveness of novel DES or LTTM has been studied for the synthesis of 7-(aryl)-10-methyl-6H
鉴于对环境的日益关注,熟练和对环境无害的合成规程的扩展引起了近来有机合成中越来越多的关注。作为这个绿色概念的一部分,我们小组在回流条件下使用甘油和脯氨酸(1:1)设计了新型LTTM,并且研究了新型DES或LTTM合成7-(芳基)-10-甲基- 6 H,7 H -chromeno [4,3- d ] thiazolo [3,2- a ] pyrimidin-6-one衍生物通过多组分反应。使用新型LTTM作为绿色溶剂,廉价且可生物降解的合成方法,由于其操作简便性和绿色化学指标计算的最大绿色合成效率,具有双重作用(可循环使用的催化剂和溶剂),将对学术和工业研究产生吸引力。合成的衍生物已被评估蚊虫幼虫的生物测定使用两种蚊虫物种,即埃及伊蚊和昆蚊(Culex quinquefasciatus)。
A Convenient K2CO3 Catalysed Regioselective Synthesis for Benzopyrano[4,3-c]pyrazoles in Aqueous Medium
heterocondensation reaction between in situ generated 3-arylidene-2,4-chromanediones and N-substituted hydrazine moiety avoiding the use of organic solvents at any stage. Water as solvent is taken for the synthesis of selective benzopyranopyrazole derivatives under microwaves (MWs). Hydroxy coumarin moiety is employed for this ecofriendly strategy.
Betaine mediated synthesis of annulated dihydrofurans from oxobis(methylthio)ketene acetals and N-butyl-N′-methyl ethane-1,2-diamine as precursors via NHC elimination
First in-situ generation of betaine intermediate has been developed using two new precursors oxobis(methylthio)ketene acetals and N-butyl-N'-methyl ethane-1,2-diamine for the synthesis of annulated dihydrofurans. This protocol adds a new dimension...
to organic synthesis of substituted benzopyranocoumarin, which is important because it is a probable HIV protease inhibitor. The reaction of α,β-unsaturated derivatives of coumarins with catechol or 1,4-hydroquinones was catalyzed using laccase in an aqueous medium. Quinones, generated in situ by the oxidation of the corresponding catechol or 1,4-hydroquinones, underwent a dominoreaction with chalcones
摘要 本研究为取代苯并吡喃香豆素的有机合成提供了一种简单方便的途径,这很重要,因为它可能是一种 HIV 蛋白酶抑制剂。香豆素的α,β-不饱和衍生物与儿茶酚或1,4-氢醌的反应在水性介质中使用漆酶催化。醌由相应的儿茶酚或 1,4-氢醌氧化原位生成,与查耳酮发生多米诺反应生成苯并吡喃香豆素。
Reaction of Coumarin Derivatives with Nucleophiles in Aqueous Medium
作者:Mazaahir Kidwai、Priya、Shweta Rastogi
DOI:10.1515/znb-2008-0110
日期:2008.1.1
A series of heterocycles was synthesized by the reaction of α,β -unsaturated ketones of benzopyrans or coumarins with various nucleophiles in aqueousmedium bearing two points of diversity. Compared to an identical library generated by conventional parallel synthesis, a microwaveassisted procedure dramatically decreased reaction times from hours to minutes, and yields of products and intermediates