Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Radell Echemendía"'
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
A novel visible-light-promoted coupling of diazoketones with sulfoxonium ylides, employing a violet light-emitting diode, is described under both batch and continuous flow conditions. This transformation permits the direct synthesis of synthetically
Publikováno v:
Chemical Science
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
The first examples of a highly efficient and enantioselective carbene-mediated insertion reaction, from a sulfur ylide, are described. By way of a catalytic asymmetric insertion reaction into N–H bonds from carbonyl sulfoxonium ylides and anilines,
Autor:
Meire Y. Kawamura, Radell Echemendía, Daniel G. Rivera, Vitor A. Fernandes, Yoisel B. Broterson, Márcio W. Paixão, Alexander F. de la Torre, Marco A. B. Ferreira, Rafaely N. Lima
Publikováno v:
Chemical Science
An efficient strategy combining the stereocontrol of organocatalysis with the diversity-generating character of multicomponent reactions is described to produce structurally unique, tetrasubstituted cyclopentenyl frameworks. An asymmetric Michael add
Autor:
Patricia B. Momo, Eduardo F. Mizobuchi, Radell Echemendía, Isabel Baddeley, Matthew N. Grayson, Antonio C. B. Burtoloso
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Momo, P B, Mizobuchi, E F, Echemendía, R, Baddeley, I, Grayson, M N & Burtoloso, A C B 2022, ' Organocatalytic Enantioselective Sulfa-Michael Additions to α,β-Unsaturated Diazoketones ', Journal of Organic Chemistry, vol. 87, no. 5, pp. 3482-3490 . https://doi.org/10.1021/acs.joc.1c03045
Universidade de São Paulo (USP)
instacron:USP
Momo, P B, Mizobuchi, E F, Echemendía, R, Baddeley, I, Grayson, M N & Burtoloso, A C B 2022, ' Organocatalytic Enantioselective Sulfa-Michael Additions to α,β-Unsaturated Diazoketones ', Journal of Organic Chemistry, vol. 87, no. 5, pp. 3482-3490 . https://doi.org/10.1021/acs.joc.1c03045
Enantioselective sulfa-Michael additions to α,β unsaturated diazocarbonyl compounds have been developed. Quinine-derived squaramide was found to be the best catalyst to promote C-S bond formation in a highly stereoselective fashion for alkyl and ar
Autor:
Radell Echemendía, Arlene G. Corrêa, Juliana A. Dantas, Marco A. B. Ferreira, Marilia S. Santos, Márcio W. Paixão
Publikováno v:
The Journal of Organic Chemistry. 85:11663-11678
A transition metal- and oxidant-free visible light-photoinduced protocol for direct functionalization of 2-methylquinolines has been developed. This protocol enabled the C-H functionalization of substituted 2-methylquinolines with diacetyl or ethyl p
Autor:
Radell Echemendía, Matheus P. De Jesus, Lucas G. Furniel, David Philip Day, Antonio C. B. Burtoloso
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f9942c327833d662334528a16a7d8029
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
The first example of organocatalytic enantioselective C-H insertion reactions of indoles and sulfoxonium ylides is reported. Under the influence of phosphoric acid catalysis, levels of enantiocontrol in the range of 20-93% ee and moderate yields (up
Autor:
Radell Echemendía, Waléria F. Rabêlo
Publikováno v:
Synthetic Communications. 49:515-521
In an attempt to further exploit multicomponent reactions in the field of 1,4 naphthoquinone-based compounds, we describe an Ugi-type multicomponent approach for the synthesis of novel 3-substituted 1,4 naphthoquinone molecules. The process relies on
Autor:
Márcio W. Paixão, Waléria F. Rabêlo, Julieta Coro, Margarita Suárez, Radell Echemendía, Ernesto R. López, Daniel G. Rivera
Publikováno v:
Tetrahedron Letters. 59:4050-4053
In an attempt to further exploit multicomponent reactions in the field of hybrid heterocyclic molecules, we describe a bidirectional approach for the synthesis of novel 1,3,5-thiadiazine-peptides molecules. The process relies on the execution of two