加巴喷丁-内酰胺和柠檬酸形成玻璃状疏水性低共熔混合物。两种组分的某些非共晶摩尔比也是低熔点混合物,并且在它们的微分量热曲线中可以看出细微的差异。然而,它们对丙二腈、芳醛和双甲酮的反应施加不同的选择性促进。有趣的是,反应混合物选择性地产生四氢苯并[ b ]吡喃-2H-酮或1,8-二氧代-八氢呫吨,取决于在加巴喷丁-内酰胺/柠檬酸的熔化的2/1或1/2摩尔混合物中进行。对于1/1摩尔比的加巴喷丁-内酰胺和柠檬酸混合物的熔化也观察到优异的促进活性。该熔体被证明是通过芳基醛、苯胺衍生物、水和乙炔酯的多米诺反应合成4-羟基-2,5-二氢吡咯-5-酮的有效促进剂。不需要额外的有机溶剂来进行反应,并且生物相容性熔体在与产品轻松分离后可以重复使用多次。即使在环境温度下长期储存,共晶和非共晶熔体仍保持其粘性液态。
Molecular Diversity of Three-Component Reactions of Aromatic Aldehydes, Arylamines, and Acetylenedicarboxylates
作者:Jing Sun、Qun Wu、Er-Yan Xia、Chao-Guo Yan
DOI:10.1002/ejoc.201100008
日期:2011.6
The three-componentreactions of aromaticaldehydes, arylamines, and acetylenedicarboxylates show very interesting moleculardiversity. In an aqueous ethanol solution the three-componentreaction gave polysubstituted 2-hydroxyhydropyridines. In absolute ethanol 1,4-dihydropyridines were produced in satisfactory yields. Finally, under acid catalysis, this three-componentreaction afforded polysubstituted
Admicellar catalysis in multicomponent synthesis of polysubstituted pyrrolidinones
作者:Rajib Sarkar、Chhanda Mukhopadhyay
DOI:10.1016/j.tetlet.2013.05.017
日期:2013.7
A multicomponent green methodology was developed to synthesize 3-hydroxy-2-pyrrolidinones under admicellar catalysis by TiO2 nano-particles at room temperature (30 degrees C). TiO2 nano-particles in aqueous CTAB solution promote the formation of admicelles and the reaction occurs in admicellar environment. The methodology was successfully applied to synthesize a variety of 3-hydroxy-2-pyrrolidinones and 3'-hydroxyspiro-2'-pyrrolidinone derivatives. (C) 2013 Elsevier Ltd. All rights reserved.