domino reaction involving Lewis acid-mediated nucleophilic-substitution/intramolecular-cyclization/reverse Claisen condensation of 2-(aryl(piperidin-1-yl)methyl)phenols and 1,3-diketones has been developed for the synthesis of 2-(3-oxo-1-phenylbutyl)phenyl acetates in good to excellent yields (77%–95%). The construction of the products has been accomplished via the domino generation of two new σ-bonds
FeCl<sub>3</sub>-Mediated One-Pot Domino Reactions for the Synthesis of 9-Aryl/9-Arylethynyl-2,3,4,9-tetrahydro-1<i>H</i>-xanthen-1-ones from Propargylic Amines/Diaryl Amines and 1,3-Cyclohexanediones
An efficient, environmentally friendly and one-pot route to new 9-aryl/9-arylethynyl-2,3,4,9-tetrahydro-1H-xanthen-1-one derivatives from inexpensive starting materials has been developed. This method proceeded by a domino nucleophilic-substitution/intramolecular cyclization/dehydration sequence of propargylic amines/diaryl amines and 1,3-cyclohexanediones under the promotion of FeCl3, which involved
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
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
Selective synthesis of 2‐(5‐oxo‐1‐arylhex‐1‐yn‐3‐yl)phenyl benzoates via FeCl
<sub>3</sub>
‐mediated cascade reactions of propargylamines with
<i>β</i>
‐enamino ketones
A mild and efficient FeCl3‐mediated cascade reaction of ortho‐hydroxyl propargylamines with β‐enamino ketones has been developed. This protocol provided a practical and selective method to synthesize 2‐(5‐oxo‐1‐arylhex‐1‐yn‐3‐yl)phenyl benzoates via in situ generated alkynyl o‐quinone methides following a cascade intermolecular 1,4‐conjugate addition/intramolecular nucleophilic addition/reverse Claisen