作者:A. P. Avdeenko、I. L. Marchenko、S. A. Konovalova
DOI:10.1023/a:1012377401470
日期:——
The direction of hydrohalogenation of N-substituted p-quinonimines was predicted on the basis of orbital coefficients of the C-2 and C-3 atoms in the lowest unoccupied molecular orbital, calculated by the PM3 method. It was assumed that the reaction is orbital-controlled and that the initial act of hydrohalogenation is nucleophilic attack by halide ion. The proposed approach was verified by experimental hydrochlorination and hydrobromination of N-(N-arylsulfonylbenzimidoyl)-1,4-benzoquinonimines which take up HHlg molecule following the 1,4-addition scheme, i.e., the halogen atom adds to C-2 of the quinoid ring.