A simple and convenient method for synthesis of new aminonaphthoquinones derived from lawsone by catalytic multicomponent Mannich reaction

Molecules with the quinone structure containing nitrogen constitute one of the most interesting classes of compounds in organic chemistry because of their biological properties and their potential as intermediates in the synthesis of heterocycles. This work describes a clean, efficient and facile on...

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Veröffentlicht in:Tetrahedron letters 2014-07, Vol.55 (31), p.4373-4377
Hauptverfasser: Fiorot, Rodolfo G., Allochio Filho, João F., Pereira, Thieres M.C., Lacerda, Valdemar, dos Santos, Reginaldo B., Romão, Wanderson, Greco, Sandro J.
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container_end_page 4377
container_issue 31
container_start_page 4373
container_title Tetrahedron letters
container_volume 55
creator Fiorot, Rodolfo G.
Allochio Filho, João F.
Pereira, Thieres M.C.
Lacerda, Valdemar
dos Santos, Reginaldo B.
Romão, Wanderson
Greco, Sandro J.
description Molecules with the quinone structure containing nitrogen constitute one of the most interesting classes of compounds in organic chemistry because of their biological properties and their potential as intermediates in the synthesis of heterocycles. This work describes a clean, efficient and facile one-pot protocol for the synthesis of a series of new aminonaphthoquinones derived from 2-hydroxy-1,4-naphthoquinone (lawsone) by three-component Mannich reaction using catalytic amount of p-TsOH at room temperature. At the present work, we improved the yield and significantly reduced the reaction time for several Mannich reactions with different amine and aromatic aldehydes using a non-expensive, mild catalyst and suitable solvent. A clean, efficient and facile one-pot protocol was developed for the synthesis of a series of new aminonaphthoquinones derived from 2-hydroxy-1,4-naphthoquinone (lawsone) by three-component Mannich reaction using catalytic amount of p-TsOH in CH3CN, at room temperature. At the present work, we improved the yield and significantly reduced the reaction time for several Mannich reactions with different amine and aromatic aldehydes using a non-expensive, mild catalyst and suitable solvent.
doi_str_mv 10.1016/j.tetlet.2014.06.031
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source Elsevier ScienceDirect Journals Complete
subjects Amines
Catalysis
Catalysts
Catalytic Mannich reaction
Cleaning
Lawsone
Multicomponent reaction
Reaction time
Solvents
Synthesis (chemistry)
Tetrahedrons
title A simple and convenient method for synthesis of new aminonaphthoquinones derived from lawsone by catalytic multicomponent Mannich reaction
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