Mannich-type reactions in a colloidal solution formed by sodium tetrakis(3,5-trifluoromethylphenyl)borate as a catalyst in water
摘要:
Sodium tetrakis(3,5-trifluoromethylphenyl) borate [NaBAr4F] efficiently catalyzed the one-pot, three-component Mannich reaction of ketones with aromatic aldehydes and different anilines in water at an ambient temperature and afforded the corresponding beta-amino carbonyl compounds in good to excellent yields. (c) 2006 Elsevier Ltd. All rights reserved.
<i>β</i>-Amino Carbonyl Compounds from Iodine-Catalyzed Three Component Mannich Reactions and Evaluation of Their Antioxidant Activity
作者:Hasniye Yaşa、Belma Hasdemir、Özge Erken
DOI:10.1080/00304948.2019.1677443
日期:2019.11.2
preparation of b-amino carbonylcompounds, using molecular iodine as a catalyst at room temperature, from ketones, aromatic aldehydes, and aromatic amines (Scheme 1). The synthesized b-amino carbonylcompounds (4a-o) were purified by crystallization or column chromatography and were characterized by elemental analysis, IR, H NMR, C NMR, and GC-MS methods. A number of these compounds (4f-i, 4k-n) are novel
An efficient and mild bismuth triflate-catalysed three-component Mannich-type reaction
作者:Thierry Ollevier、Etienne Nadeau
DOI:10.1039/b710794c
日期:——
In the presence of a catalytic amount of Bi(OTf)(3).4H(2)O, aldehydes together with amines react with silylenolates to afford the corresponding Mannich-type adducts smoothly. A wide variety of silylenolates derived from ketones, as well as esters and thioesters, react rapidly to afford the beta-amino ketones or the beta-amino esters in high yields (up to 94%).
Solvent-free Imino-Aldol Three-component Couplings on a Conveniently-prepared and Reusable Phosphoric Acid-Silica Gel Support
作者:Sandra Lock、Norikazu Miyoshi、Makoto Wada
DOI:10.1246/cl.2004.1308
日期:2004.10
solvent-free procedure for the synthesis of β-amino carbonyl compounds in generally moderate to excellent yields has been developed. Three-component Mannich-type couplings between aldehydes (aromatic, aliphatic, alicyclic, and heterocyclic), aromatic amines and silyl enol equivalents proceeded smoothly on a conveniently prepared and reusable phosphoric acid-silica gel solid support.
Chemoselective Activation of Aldimine in Preference to Aldehyde by the Combination of BF<sub>3</sub>•OEt<sub>2</sub>and Water: Novel Catalyst for the Mannich-type Reaction
作者:Takahiko Akiyama、Jun Takaya、Hirotaka Kagoshima
DOI:10.1246/cl.1999.947
日期:1999.9
Reported herein are that catalytic amount of conventional Lewis acids activated aldimines in preference to aldehydes, and addition of water to BF3•OEt2 accelerated the Mannich-type reaction significantly to afford β-amino carbonyl compounds in high yields.
This manuscript describes the first example of silver ion complex of a dendritic tetranitrile ligand catalyzed one-pot three component Mannich reaction and 1,5-benzodiazepine synthesis. The catalyst can be separated from the products by a change in the solvent. The catalyst is reusable.