2-Methoxyethanol → HCID 57642342, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 1.0 g (0.0031 mole) of 5-(2-chlorophenyl)-1,3-dihydro-7,8-difluoro-2H-1,4-benzodiazepin-2-thione (IImm), 0.372 g of sodium hydride and 20 mL of 2-methoxyethanol was heated in a microwave vessel at 120° C. for 30 minutes, cooled and then diluted with ethyl acetate. The mixture was washed successively with water and brine, dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure. The residue was triturated with ethyl acetate to give 0.74 g of 5-(2-chlorophenyl)-1,3-dihydro-7-fluoro-8-methoxyethoxy-2H-1,4-benzodiazepin-2-thione (IIf) as a white solid, which was then used to prepare 5-(2-chlorophenyl)-1,2-dihydro-7-fluoro-8-methoxyethoxy-3-methyl-pyrazolo[3,4-b][1,4]benzodiazepine (IVf) in accordance with Example 58 without further purification.

Provenance & Evidence