Sodium Hydroxide → HCID 21449869, compound

Participants

Reaction Steps

9 G. of 10-chloro-8-fluoro-10,11-dihydro-3-trifluoromethyldibenzo[b,f]thiepin are treated with 11 g. of N-methylpiperazine and stirred for 10 minutes at 105°-110°C. The cooled mixture is treated with 2N sodium hydroxide and extracted with ether. The ether solution is washed neutral with water and shaken with dilute methanesulfonic acid. The acidic solution is made alkaline with sodium hydroxide and extracted with ether. The organic phase is washed with water, dried over magnesium sulfate and evaporated in a vacuum, and there is obtained 1-{8-fluoro-10,11-dihydro-3-trifluoromethyl-dibenzo[b,f]thiepin-10-yl}-4-methylpiperazine as a yellow oil which is converted into the methanesulfonate having a melting point of 224°-226°C. by treatment with methanesulfonic acid.

Provenance & Evidence