A. E. Ismail, A. Hamed, M. T. Abdel-Aal
1992
Citations
0
Influential Citations
4
Citations
Journal
Journal Fur Praktische Chemie-chemiker-zeitung
Abstract
Isocyanates react as N-nucleophiles with α-chlorobenzylic cations (2) to give 1-oxoisoindolium salts (5). From the reaction of benzotrichlorides with SbCl5 and isocyanates the extremely reactive hexachloroantimonates 5 with R2 = Cl are isolated. Hydrolysis of these cyclic N-acyl iminium salts affords phthalimides 6. Reaction of 5 k with dimethylcyanamide gives the 2-azoniaallene salt 13. p-Tolyl isocyanate is Friedel-Crafts alkylated by p-chlorobenzotrichloride (1i) in the presence of SbCl5 to furnish the 1,3-oxadiazinium salt 7, which is hydrolyzed to give the benzophenone 9. With ethanol the acetals 10 and 11 are formed from 7.