nafion® 117, PEG-OSO3H, tween® 80, poly styrene –SO3H and chitosan for the preparation of alkylaminophenols through Petasisborono–Mannichreaction by one-pot three component condensation of o-hydroxy aldehydes, secondary amines, and various boronic acids. It was observed that the reaction was completed in a short period of time and the yield was optimum by virtue of chitosan heterogeneous catalyst. Furthermore
Glycerol as an Efficient Medium for the Petasis Borono-Mannich Reaction
作者:Tomi Rosholm、Pedro M. P. Gois、Robert Franzen、Nuno R. Candeias
DOI:10.1002/open.201402066
日期:2015.2
provided the reaction product in higher yield. Crude glycerol, as generated by the biodiesel industry, was evaluated and found to be a suitable solvent for the PBM reaction, successfully expanding the potential use of this industry by‐product. Based on density functional theory (DFT) calculations and the obtained experimental results, the involvement of glycerol‐derived boronic esters in the reaction mechanism
We have used a design of experiments (DOE) approach to optimise rapidly a set of microwave assisted conditions for the Petasis reaction. The optimal conditions involved the microwave heating of the reaction components in dichloromethane (1 M concentration) at 120 degreesC for 10 min in a focussed microwave (CEM Explorer). These conditions were successfully applied to a range of Petasis reactions employing either glyoxylic acid or salicylaldehyde as the carbonyl component along with a number of aryl/heteroaryl boronic acids and amine components. (C) 2003 Elsevier Ltd. All rights reserved.
Multicomponent Petasis-borono Mannich Preparation of Alkylaminophenols and Antimicrobial Activity Studies
作者:Íris Neto、Joana Andrade、A. S. Fernandes、Catarina Pinto Reis、Jagadish K. Salunke、Arri Priimagi、Nuno R. Candeias、Patrícia Rijo
DOI:10.1002/cmdc.201600244
日期:2016.9.20
starting from salicylaldehyde and its derivatives. The obtained compounds were tested against a large panel of microorganisms, Gram-positive and Gram-negative bacteria, and a yeast. Among the several tertiary amine derivativestested, indoline-derived aminophenols containing a nitro group at the para-phenol position showed considerable activity against bacteria tested with minimal inhibitory concentrations