Activated sterically strained C=N bond in N-substituted p-quinone mono- and diimines: XIII. Reactions of N-alkyl(aryl, trifluoromethyl)sulfonyl-, N-arylsulfinyl- and N-arylsulfanyl-1,4-benzoquinone monoimines with alcohols
作者:A. P. Avdeenko、S. A. Konovalova、O. N. Mikhailichenko、A. A. Santalova、G. V. Palamarchuk、O. V. Shishkin
DOI:10.1134/s107042801205003x
日期:2012.5
Steric strains arising between the substituent atoms at nitrogen (S, SO, or SO2) and the methyl group located in positions 3 or 5 of the quinoid ring of 3,5-dimethyl-substituted quinone monoimines lead to the increased angle C=N-S. As a result in these quinone monoimines the reactions of 1,2-addition become thermodynamically possible since the formation of quinolide structures with the sp(3)-hybridized carbon atom removes the steric strain.