Water → HCID 19881130, compound

Participants

Reaction Steps

To a solution of 3.0 g of 4-(4-chlorobutyl)-2,3-dihydro-7-methylthieno[3,2-f][1,4]thiazepin-5(4H)-one in 30 ml of dimethylformamide was added 2.3 g of potassium phthalimide and stirred at 70°-80° C. for 6 hours. After cooling, the mixture was poured into water and extracted with ethyl acetate. The extract was washed with water, dried and concentrated in vacuo. The resulting crude crystals were recrystallized from methanol to give 4.6 g of 4-(4-phthalimidobutyl)-2,3-dihydro-7-methylthieno[3,2-f][1,4]thiazepin-5(4H)-one hydrate as white crystals, melting at 120°-121° C.

Provenance & Evidence