Leonardo Soares Francisco de Almeida
Federal Fluminense University
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Química Nova | 2008
Carlos Magno R. Ribeiro; Pablo P. de Souza; Letícia L. D. M. Ferreira; Lia A. Pinto; Leonardo Soares Francisco de Almeida; Janaina G. de Jesus
This work describes the cyclization of lapachol (1) induced by thallium triacetate (TTA) and thallium trinitrate (TTN) in several solvents using magnetic stirring and under microwave irradiation. a-Xyloidone (2) - dehydro-a-lapachone - was obtained as the main product in these reactions in 20 75% yield. However, rhinacanthin-A (4) was isolated as main product in a 40% yield, using TTA and acetic anhydride:water (1:1) as solvent, and dehydro-iso-a-lapachone (3) in 21% yield, using TTA and dichloromethane as solvent. The reaction time decreased drastically under microwave conditions, but the yields of these reactions were not the expected.
RAGC | 2017
Leonardo Soares Francisco de Almeida; Julio Vieira Neto; José Geraldo Abunahman; Francisco Marcelo Garritano Barone Nascimento
REVISTA DE TRABALHOS ACADÊMICOS UNIVERSO – SÃO GONÇALO | 2016
Simpson Mendonça da Cruz; Leonardo Soares Francisco de Almeida; Yohans de Oliveira Esteves; Mariana Marinho da Costa Lima Peixoto
REVISTA DE TRABALHOS ACADÊMICOS UNIVERSO – SÃO GONÇALO | 2016
Yohans de Oliveira Esteves; Tairine Pereira da Costa; Leonardo Soares Francisco de Almeida; Marcelo Lourenço da Silva Travassos
REVISTA DE TRABALHOS ACADÊMICOS UNIVERSO – SÃO GONÇALO | 2016
Yohans de Oliveira Esteves; Leonardo Soares Francisco de Almeida; Thamyris Alves Ferreira; Mariana Marinho da Costa Lima Peixoto
REVISTA DE TRABALHOS ACADÊMICOS UNIVERSO – SÃO GONÇALO | 2016
Yohans de Oliveira Esteves; Gizele Izidoro Alves da Rosa; Leonardo Soares Francisco de Almeida; Mariana Marinho da Costa Lima Peixoto
REVISTA DE TRABALHOS ACADÊMICOS UNIVERSO – SÃO GONÇALO | 2016
Yohans de Oliveira Esteves; Leonardo Soares Francisco de Almeida; Mariana Marinho da Costa Lima Peixoto; Keila Márcia Ferreira de Souza
REVISTA DE TRABALHOS ACADÊMICOS UNIVERSO – SÃO GONÇALO | 2016
Yohans de Oliveira Esteves; Adalton Ferre Martins; Leonardo Soares Francisco de Almeida; Marcelo Lourenço da Silva Travassos
Gestão & Produção | 2016
Leonardo Soares Francisco de Almeida; Julio Vieira Neto; Mara Telles Salles; Carlos Alberto Pereira Soares; Yohans de Oliveira Esteves
Sustainable Business International Journal | 2015
Leonardo Soares Francisco de Almeida
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