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
Solvent-free reactions of salicylaldehyde with various boronicacids and amines were accomplished under ball-milling conditions to achieve the corresponding alkyl- and arylaminophenols in good to excellent yields. This simple protocol offers advantages such as high yields, shorter reaction times, simple workup procedure and eco-friendliness.
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
Water: A Suitable Medium for the Petasis Borono-Mannich Reaction
作者:Nuno R. Candeias、Luís F. Veiros、Carlos A. M. Afonso、Pedro M. P. Gois
DOI:10.1002/ejoc.200900056
日期:——
Water was used as the solvent in the Petasisborono-Mannichreaction. With the use of salicylaldehyde, secondary amines and boronic acids, several alkylaminophenols were obtained in considerably high yields in water. By using the same methodology, 2H-chromenes were prepared with the use of vinyl boronic acids. The reaction mechanism was studied by DFT calculations, and the results obtained corroborate
Solvent‐free Synthesis of Alkylaminophenols via Petasis Boronic Mannich Reaction in One Pot without Catalysts
作者:Ying Liu、Limin Wang、Yuanyuan Sui、Jianjun Yu
DOI:10.1002/cjoc.201090340
日期:2010.10
By using solvent‐free and heat conditions, the Petasis boronic Mannich reaction of salicylaldehydes with various boronic acids and secondary amines without catalyst is described. The alkylaminophenols were obtained in moderate to good yields in a shorter reaction time than the traditional methods.