Activated sterically strained C=N bond in N-substituted p-quinone mono- and diimines: XIV. Reaction of some 3,5-dimethyl-1,4-benzoquinone monoimines with alcohols
摘要:
Steric strain in the C=N-C fragment in 3,5-disubstituted N-acyl-1,4-benzoquinone monoimines, unlike their N-arylsulfonyl analogs, leads to increase of the C=N-C angle above 130A degrees or twisting of the double C=N bond and loss of planarity of the quinoid ring. This structural transformation enhances the reactivity of the C=N bond so that 1,2-addition of alcohols becomes possible with formation of sterically unstrained cyclohexadienone structure with sp (3)-hybridized C-4 carbon atom. DOI: 10.1134/S1070428013010107
Synthesis and structure of N-aryl(phenoxy, benzylidene)acetyl-1,4-benzoquinone monoimines
摘要:
New N-aryl(phenoxy, benzylidene)acetyl-1,4-benzoquinone monoimines were synthesized by reaction of aminophenols with arylacetyl, phenoxyacetyl, and cinnamoyl chlorides in dimethylformamide-acetic acid (1: 3) in the presence of anhydrous sodium acetate. Structural parameters of the products and their probable biological activity were determined.
Reaction of N-[aryl(benzylidene, phenoxy)acetyl]-1,4-benzoquinone imines with sodium 4-methylbenzenesulfinate
作者:S. A. Konovalova、A. P. Avdeenko、V. M. Vasil’eva、A. L. Yusina
DOI:10.1134/s1070428014100054
日期:2014.10
The reaction of N-[aryl(phenoxy, benzylidene)acetyl]-1,4-benzoquinone imines with sodium 4-methylbenzenesulfinates takes different addition patterns, depending on the LUMO energy and charge distribution over the quinoid ring of the initial quinone imine.
Synthesis and structure of N-aryl(phenoxy, benzylidene)acetyl-1,4-benzoquinone monoimines
作者:A. P. Avdeenko、S. A. Konovalova、V. M. Vasil’eva、O. V. Shishkin、G. V. Palamarchuk、V. N. Baumer
DOI:10.1134/s1070428012100089
日期:2012.10
New N-aryl(phenoxy, benzylidene)acetyl-1,4-benzoquinone monoimines were synthesized by reaction of aminophenols with arylacetyl, phenoxyacetyl, and cinnamoyl chlorides in dimethylformamide-acetic acid (1: 3) in the presence of anhydrous sodium acetate. Structural parameters of the products and their probable biological activity were determined.
Activated sterically strained C=N bond in N-substituted p-quinone mono- and diimines: XIV. Reaction of some 3,5-dimethyl-1,4-benzoquinone monoimines with alcohols
作者:A. P. Avdeenko、S. A. Konovalova、V. M. Vasil’eva、G. V. Palamarchuk、V. N. Baumer、O. V. Shishkin
DOI:10.1134/s1070428013010107
日期:2013.1
Steric strain in the C=N-C fragment in 3,5-disubstituted N-acyl-1,4-benzoquinone monoimines, unlike their N-arylsulfonyl analogs, leads to increase of the C=N-C angle above 130A degrees or twisting of the double C=N bond and loss of planarity of the quinoid ring. This structural transformation enhances the reactivity of the C=N bond so that 1,2-addition of alcohols becomes possible with formation of sterically unstrained cyclohexadienone structure with sp (3)-hybridized C-4 carbon atom. DOI: 10.1134/S1070428013010107