反应详情

2 ml of cyclohexanecarboxylic acid and 2 ml of cyclohexanecarbonyl chloride were added to 1 g of 8-toluyloxy-5-(1-hydroxy-2-isopropylaminobutyl)carbostyril and the mixture was allowed to react for 1 hour at a temperature of 80° C. After completion of the reaction, 2 to 3 drops of concentrated hydrochloric acid and 10 ml of methanol were added to the reaction mixture while cooling with ice-water followed by addition of diethyl ether to crystallize the product. The crystals thus obtained were separated by filtration, washed with diethyl ether and recrystallized from a mixture of methanol and diethyl ether to obtain 1.3 g of 8-toluyloxy-5-(1-cyclohexylcarbonyloxy-2-isopropylaminobutyl)carbostyril hydrochloride having a melting point of 231°-232.5° C.

1. customto react for 1 hour at a temperature of 80° C
2. additionwere added to the reaction mixture
3. customto crystallize the product
4. customThe crystals thus obtained
5. customwere separated by filtration
6. washwashed with diethyl ether
7. customrecrystallized from a mixture of methanol and diethyl ether