Highly efficient and facile synthesis of β-enaminones catalyzed by diphenylammonium triflate
作者:Ting-Ting Zhao、Jiang-Long Song、Feng-Qing Hong、Jian-Sheng Xia、Jian-Jun Li
DOI:10.1007/s11696-019-00838-2
日期:2019.11
The catalytic performance of diphenylammonium triflates as an organocatalyst in the synthesis of β-enaminones from various substituted β-diketones and amides (or amines) were evaluated. A wide range of β-enaminones were efficiently synthesized in good to excellent yields under mild reaction conditions. Applying diphenylammonium triflate (DPAT) as catalyst makes this protocol cost-effective, low corrosive and easy to handle.
A new protocol for the synthesis of various 1,2,3,4-tetrasubstituted 1,4-dihydropyridines from enamino or carbonylic derivatives promoted by Mg(ClO4)2 is presented.
Sublimable bis( β -iminoenolate)palladium(II) complexes and their application as catalysts in Suzuki-Miyaura reactions
作者:Mi Jin Kim、Myung Jin Jung、Yeong Joon Kim、Ha Kyoung Sung、Ju Young Lee、Sung Jin Ham、Chan Pil Park
DOI:10.1016/j.tetlet.2018.06.051
日期:2018.8
The Pd(II) complexes strongly chelated by two β-iminoenolate ligands were easily synthesized in only two steps, and purified based on their sublimable and highly stable property. The Pd(II) complexes anchored on a silica surface showed good catalytic activity in Suzuki-Miyaurareactions (up to 99% yield with 0.05 mol% catalyst). They tolerated a wide range of temperature (rt∼110 °C) and various solvents
Lewis acids catalyze the addition of β-enaminoacrylates or β-enaminones to α,β-unsaturated aldehydes leading to substituted dihydropyridines in high yields under mild reaction conditions.
Approach to Synthesis of β-Enamino Ketones and Pyrroles Catalyzed by Gallium(III) Triflate Under Solvent-Free Conditions
作者:Jiuxi Chen、Xiaoliang Yang、Miaochang Liu、Huayue Wu、Jinchang Ding、Weike Su
DOI:10.1080/00397910902898528
日期:2009.11.5
Abstract Metal triflates have been used to catalyzesynthesis of β-enamino ketones or pyrroles from amines and 1,3-dicarbonyl or 1,4-dicarbonyl compounds undersolvent-freeconditions, respectively. Among different metal triflates screened, 0.5 mol% Ga(OTf)3 efficiently promoted the reactions to give excellent yields. In addition, the catalyst could be recovered easily after the reactions and reused