Réaction #53336

Équation de réaction

carbothioyl chloride

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

hydrazine hydrate

water

→

crude product

Rendement 90.2%

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

Rendement 90.2%

Solvants

tetrahydrofuran

Conditions de réaction

Traitement

1. 1
   Filtrationthe precipitated product was filtered off

Mode opératoire

1.0 g (2.47 mmol) of carbothioyl chloride XI was added to a stirred solution of 0.37 g (7.42 mmol) of hydrazine hydrate in 15 ml of tetrahydrofuran at 5-10° C. over a period of about 0.5 h, then after 1 h stirring, the mixture was poured into water and the precipitated product was filtered off to yield 0.89 g (90%) of the crude product. After drying, it was used in the further reaction steps. The melting point of the product after recrystallization from ethanol was 196° C.

Source