Zobrazeno 1 - 10
of 49
pro vyhledávání: '"Josefa Anaya"'
An unexpected bicyclic pyrrolidinedione by rearrangement of the β-lactam ring under basic conditions
Publikováno v:
ARKIVOC, Vol 2010, Iss 3, Pp 228-236 (2009)
Externí odkaz:
https://doaj.org/article/4ec357b434aa4e97bbf50e2a11861d7f
Publikováno v:
Tetrahedron. 74:5415-5426
A Staudinger reaction between methoxyketene and two different imines formed from citral afforded, after chemical transformation, the (E/Z)-4-alkenylepoxy-2-azetidinones 2, 3 and 4. These compounds, by reaction with Cp2TiCl, did not cyclize to afford
Autor:
César Raposo, Pascual Torres, Antonio J. Pujadas Salvà, Josefa Anaya, Enrique Triano Muñoz, Pilar Hernández, Manuel Grande
Publikováno v:
Acta Botanica Malacitana. 40:71-88
Se describe Foeniculum sanguineum Triano & A. Pujadas, sp. nov., del suroeste de la Región Mediterránea (España y Marruecos). Para su caracterización se ha realizado el análisis morfológico, citológico, fitoquímico y molecular. Se ha llevado
Autor:
Josefa Anaya, Ramón M. Sánchez
Publikováno v:
Progress in Heterocyclic Chemistry ISBN: 9780323898126
Progress in Heterocyclic Chemistry ISBN: 9780323984102
Progress in Heterocyclic Chemistry ISBN: 9780443189395
Progress in Heterocyclic Chemistry ISBN: 9780323984102
Progress in Heterocyclic Chemistry ISBN: 9780443189395
The review covers work published in the calendar year 2015. The synthesis and reactivity of four-membered heteroatom-containing cycles are reviewed. New developments in the chemistry of these strained heterocycles, especially β-lactams, are covered.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a1de5ad0f07426342a987f8ec036b980
https://doi.org/10.1016/b978-0-08-102788-2.00004-0
https://doi.org/10.1016/b978-0-08-102788-2.00004-0
Publikováno v:
Tetrahedron. 68:10794-10805
Radical cyclisation induced by Cp2TiCl of several 1,5- and 1,6-epoxynitriles derived from β-lactams gave 3-oxo-4-methyl-4-hydroxymethylcarbapenams or 4-oxo-5-methylbenzocarbacephems. Apart from these polycyclic β-lactams, the generated alkyl tertia
Publikováno v:
Synlett. 2010:1227-1230
In order to synthesize new tricyclic β-lactams we have studied the reactivity of 4-alkenylepoxy-N-(1-cyano-1-dimethylethyl)-2-azetidinones with Cp 2 TiCl. The desired trilactams were not formed at all but an unsaturated nitrile and an aldehyde were
An unexpected bicyclic pyrrolidinedione by rearrangement of the β-lactam ring under basic conditions
Publikováno v:
ARKIVOC, Vol 2010, Iss 3, Pp 228-236 (2009)
During synthetic studies on anti-elastase polycyclic β-lactams from conveniently substituted monolactams, we attempted to obtain an N-(1 -methoxycarbonyalkylidene)-β-lactam by αselenoxide elimination. Although the desired alkenes 5 were obtained,
Approach to Substituted Methylcarbapenems and Benzocarbacephems by Radical Cyclization Using Cp2TiCl
Publikováno v:
Synlett. 2007:1243-1246
The reductive radical cyclization of 4-(1-methyl-2--phenyloxiranyl)-β-lactams has been achieved using titanocene monochloride. The reaction was regioselective and diastereoselective to afford carbapenems and benzocarbacephems. A rearrangement of β-
Publikováno v:
Tetrahedron. 63:3017-3025
The reductive radical cyclisation of δ- and ɛ-epoxynitrile-2-azetidinones has been achieved using titanocene monochloride. The reaction was regioselective and afforded bicyclic β-lactams and tricyclic β-lactams containing an aryl group fused to a
Publikováno v:
Colloids and Surfaces A: Physicochemical and Engineering Aspects. 280:17-22
In order to study the effect of charge on the adsorption of surfactants at the air–water interface, two carboxybetaines have been synthesized with different number of separation methylenes between their charged groups. After purification and struct