409343-66-4Relevant academic research and scientific papers
Thermolysis of 1-(methylideneamino)-1H-pyrrole-2,3-diones. Synthesis of pyrazolooxazines by [4 + 2]-cycloaddition of azomethine imines to alkenes
Zhulanov,Dmitriev,Maslivets
, (2017)
Thermolysis of methyl 3-acyl-1-[(diphenylmethylidene)amino]-4,5-dioxo-4,5-dihydro-1H-pyrrole-2-carboxylates generates 4-acyl-1-(diphenylmethylidene)-3-(methoxycarbonyl)-1H-pyrazol-1-ium-5-olates which react with alkenes to give methyl 3-acyl-7,7-diphenyl-
Synthesis and crystal and molecular structure of 3,5-dihydroxy-1-diphenylmethyleneamino-5-methoxycarbonyl-4-p-toluoyl-2,5- dihydro-2-pyrrolone
Aliev,Krasnykh,Konyukhova,Maslivets,Atovmyan
, p. 848 - 853 (2001)
The reaction between methyl 2-diphenylmethylenehydrazino-4-oxo-4-p-tolyl-2-butenic ether and oxalyl chloride gave 1-diphenylmethyleneamino-5-methoxycarbonyl-4-p-toluoyl-2,3-dihydro-2,3- pyrroledione, which adds water to yield substituted 3,5-dihydroxy-2,5
Stabilization of (N-methyleneamino)imidoylketenes: Synthesis of dipyrazolo[1,2-a;1′,2′-d][1,2,4,5]tetrazines
Lisowskaya, Natalia A.,Maslivets, Andrei N.,Aliev, Zainutdin G.
, p. 5319 - 5323 (2004)
Thermolysis of substituted methyl 1-methyleneamino-4,5-dioxo-4,5-dihydro- 1H-pyrrole-2-carboxylates 2a,b led to substituted dimethyl 3,9-dioxo-1,5,7,11- tetrahydro-1H,7H-dipyrazolo[1,2-a;1′,2′-d][1,2,4,5]tetrazine-1, 7-dicarboxylates 4a,b and methyl 2,5-d
Thermolysis of 1-(methylideneamino)-1H-pyrrole-2,3-diones. Formation of pyrazolodioxazines at [4+2]-cycloaddition of azomethinimines to arylcarbaldehydes
Zhulanov,Dmitriev,Maslivets
, (2017)
4-Acyl-1-[(diphenylmethylidene)amino]-5-methoxycarbonyl-1Н-pyrrole-2,3-diones generate at the thermolysis 4-acyl-3-(methoxycarbonyl)-1-(diphenylmethylidene)-1H-pyrazol-1-ium-5-olates that react with aromatic aldehydes to form methyl 2-aryl-8-acyl-4,4-diph
Dipyrazolodioxadiazocines as shelf-stable ready-to-use precursors for an: In situ generation of enolate-iminium 1,4-dipoles: A straightforward atom-economical approach to pyrazolo[5,1- d] [1,3,5]dioxazines
Dmitriev, Maksim V.,Maslivets, Andrey N.,Rubin, Michael,Silaichev, Pavel S.,Vigovskaya, Valeria A.,Zhulanov, Vladimir E.
, p. 3382 - 3391 (2020/09/15)
An original, facile and highly efficient method for the in situ generation of cyclic enolate-iminium 1,4-dipoles via unique thermal decomposition of easily available dipyrazolodioxadiazocines has been developed. Various substituted pyrazolo[5,1-d][1,3,5]dioxazines have been prepared in high yields via unusual cycloconversion of dipyrazolodioxadiazocines in the presence of ketones. Furthermore, the developed method is 100% atom economical and proceeds under metal-, catalyst- and solvent-free conditions.
New method for: In situ generation of enolate-iminium 1,4-dipoles for [4 + 2] and [4 + 1] dipolar heterocycloaddition reactions
Zhulanov, Vladimir E.,Dmitriev, Maksim V.,Maslivets, Andrey N.,Rubin, Michael
, p. 90239 - 90247 (2016/10/07)
Generation of hydrazoylketenes by thermal decomposition of N-(diphenylenamino)pyrrolediones is accompanied by 5-exo-trig ring closure to furnish a zwitterionic dihydropyrazolone species. In contrast to Lisowskaya's earlier report, we established that in most cycloaddition reactions such dihydropyrazolones react as 1,4-dipoles. This reactivity pattern was demonstrated in several [4 + 4]-homodimerizations and in a series of [4 + 2] and [4 + 1] cycloaddition reactions with various dipolarophiles.
