反应详情

1000 mg. (2.13 mmoles) of (+)-1α-ethyl-1β- carboxyethyl-6-carboxy-1,2,3,4,6,7-hexahydro-12H-indolo(2,3-a)-quinolizin-5-ium perchlorate in 15 ml. of decalin are heated at 160° to 170° C. for 25 minutes, with stirring. The substance melts accompanied by gas evolution. After cooling the reaction mixture is filtered, the solid obtained is washed decalin-free with three 5-ml. portions of ether and is dried. 880 mg. of the title compound are obtained. Yield: 97.2% [α]D25 =-19°.

1. temperatureAfter cooling the reaction mixture
2. filtrationis filtered
3. customthe solid obtained
4. washis washed decalin-free with three 5-ml
5. dry with materialportions of ether and is dried