反应详情

A suspension of platinum oxide (20 mg.) in 2 ml. of absolute alcohol is pre-reduced by shaking with hydrogen in a Hershberg apparatus. A solution of 5-(3-aminopropyl)-5H-dibenzo[a,d]cycloheptene (0.75 g., 0.003 mole) and acetone (0.5 ml.) in 5 ml. of absolute alcohol is added and the mixture shaken with hydrogen in a Hershberg apparatus until the hydrogen uptake is complete. Catalyst is filtered through a mat of diatomaceous earth and washed with absolute alcohol. The combined filtrate and washings are evaporated to dryness on the steam-bath under reduced pressure. The residual oily base is dissolved in absolute alcohol and treated with a solution of dry hydrogen chloride in absolute alcohol. The white crystalline 5-(3-isopropylaminopropyl)-5H-dibenzo[a,d]cycloheptene hydrochloride is precipitated by addition of absolute ether in a yield of 0.80 g. (92%), m.p. 234°-236°C. The melting point was unchanged by a further recrystallization from a mixture of isopropyl alcohol and absolute ether.

1. filtrationCatalyst is filtered through a mat of diatomaceous earth
2. washwashed with absolute alcohol
3. customThe combined filtrate and washings are evaporated to dryness on the steam-bath under reduced pressure
4. dissolutionThe residual oily base is dissolved in absolute alcohol
5. additiontreated with a solution of dry hydrogen chloride in absolute alcohol
6. customThe white crystalline 5-(3-isopropylaminopropyl)-5H-dibenzo[a,d]cycloheptene hydrochloride is precipitated by addition of absolute ether in a yield of 0.80 g
7. customThe melting point was unchanged by a further recrystallization from a mixture of isopropyl alcohol and absolute ether