反应详情

Anthracene-9-carbonyl chloride (62.2 mmol) was suspended in anhydrous dichloromethane (30 mL) and added slowly by pipette to a solution of [1,4′]bipiperidinyl-3-Carboxylic acid ethyl ester bishydrochloride (62.2 mmol) and triethylamine (4 eq., 35 mL) in anhydrous dichloromethane (50 mL) at such a rate that a gentle reflux was maintained. The resulting suspension was stirred overnight at ambient temperature then shaken with ice-cold water containing sodium hydroxide (0.19 mol, 7.6 g). The dichloromethane layer was separated and the aqueous layer was extracted with dichloromethane. The combined dichloromethane solution was washed with water, dried with anhydrous sodium sulfate, diluted with a little xylene and evaporated to dryness to give the title compound (containing a small amount of the corresponding isopropyl ester) as a pale yellow gummy foam (30.8 g).

1. temperaturea gentle reflux
2. temperaturewas maintained
3. stirringthen shaken with ice-cold water
4. customThe dichloromethane layer was separated
5. extractionthe aqueous layer was extracted with dichloromethane
6. washThe combined dichloromethane solution was washed with water
7. dry with materialdried with anhydrous sodium sulfate
8. additiondiluted with a little xylene
9. customevaporated to dryness