Réaction #53342

Équation de réaction

starting material I

(±)-8-Methyl-5-(4-nitrophenyl)-7-thiocarbamoyl-8,9-dihydro-7H-1,3-dioxolo[4,5-h][2,3]benzodiazepine

chloroacetone

dimethylformamide

→

title compound

Rendement 82.5%

(±)-8-Methyl-7-(4-methyl-thiazol-2-yl)-5-(4-nitrophenyl)-8,9-dihydro-7H-1,3-dioxolo[4,5-h][2,3]benzodiazepine

Rendement 82.5%

Solvants

water

Conditions de réaction

Traitement

1. 1
   Filtrationthe precipitated crystals were filtered off
2. 2
   Autredried
3. 3
   Autrepurified
4. 4
   Températureby refluxing in ethanol

Mode opératoire

A mixture of 0.76 g (1.98 mmol) of the starting material I, 1.10 g (11.88 mmol) of chloroacetone and 15 ml of dimethylformamide was stirred at 80-90° C. for 40 min. Then the reaction mixture was diluted with water, the precipitated crystals were filtered off, dried and purified by refluxing in ethanol to yield 0.69 g (82%) of the title compound; Mp.: 188-189° C.

Source