Improvements in the Hetero Diels-Alder Reactions of 1-Dimethylamino-1-azadienes in the Presence of an Electrophilic Scavenger Resin
作者:Eva Pascual-Alfonso、Carmen Avendaño、J. Carlos Menéndez
DOI:10.1055/s-2000-6501
日期:2000.2
Reactions between 1-dimethylamino-1-azadienes and several quinones in the presence of a chloroformyl polystyrene resin proceeded with up to 2.5-fold increase in the isolated yields of the hetero Diels-Alder products, owing to efficient scavenging of dimethylamine liberated from the primary cycloadducts.
Silica gel-supported hetero Diels-Alder reactions of quinolinetriones
作者:JoséMaría Pérez、Pilar López-Alvarado、Miguel Ángel Alonso、Carmen Avendaño、J Carlos Menéndez
DOI:10.1016/0040-4039(96)01526-2
日期:1996.9
When 2,5,8(1H)-quinolinetriones were supported on silica gel and treated with 1-dimethylamino-1-azadienes in excess, followed by rapid chromatography, the corresponding 5,8-dihydro-1,8-diazaanthracene-2,9,10-triones or 1,8-diazaanthracene-2,9,10-triones were obtained, normally in excellent yields. This procedure minimizes or completely prevents the addition of dimethylamine to the starting quinone
Azaanthracene-triones of the formula:
(in which: R¹, R², R⁴ and R⁵ are the same or are different and each is a hydrogen atom or a lower alkyl group;
R³ is a hydrogen atom, a lower alkyl group, a phenyl group or an amino-substituted phenyl gro up; and
X is a -CH-, =N- or -NH-, whereby the ring containing the group X is a benzene, pyridine or dihydropyridene ring)
have antitumoral activity.
Synthesis and structure–activity relationships of 1,5-diazaanthraquinones as antitumour compounds
作者:Carmen Avendaño、José Marı́a Pérez、Ma̱ del Mar Blanco、Jesús Ángel de la Fuente、Sonia Manzanaro、Marı́a Jesús Vicent、Marı́a Jesús Martı́n、Nélida Salvador-Tormo、J.Carlos Menéndez
DOI:10.1016/j.bmcl.2004.05.055
日期:2004.8
1,5-Diazaanthraquinone derivatives were synthesized employing single and double hetero Diels-Alder strategies. Their in vitro antitumour activity was assayed using three cell lines. Some of these compounds, specially those bearing methyl or ethyl groups at the C-3,7 positions or chloro at C-4 and methyl at C-7, showed IC50 values in the 10(-8) M range for human lung carcinoma and human melanoma, which makes them attractive candidates for further development as anticancer agents. (C) 2004 Elsevier Ltd. All rights reserved.