تفاعل #93055
ord-ba80817353b042f8ae39403d5f4c8a43
معادلة التفاعل
المتفاعلات
الكواشف
ظروف التفاعل
المعالجة
- 1درجة الحرارةat reflux for two hours
- 2أخرىseparation
- 3أخرىto give a three-layer system
الإجراء التجريبي
To a solution of 4.8 g of 2-[(dimethylamino)methyl]2,3-dihydro-4-methylpyrido[3,2-f][1,4]oxazepin-5(4H)-one in 50 ml of toluene was added 4.9 g of 2,4-bis(4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane-2,4-disulfide. The reaction mixture was kept at reflux for two hours. Concentrated potassium carbonate solution was added which caused separation to give a three-layer system: a toluene layer, an aqueous layer and a gummy layer. Only the toluene and aqueous layer contained the desired free base of the title compound. The layers were separated and the gummy layer was discarded. The aqueous layer was extracted three times with methylene chloride. The methylene chloride extracts after washing with saturated sodium chloride solution were combined with the toluene layer. This organic solution was dried over anhydrous sodium sulfate and evaporated to give 5.25 g of oil. The oil, the free base of the title compound, was dissolved in methanol to which solution was added 2.45 g of fumaric acid. The mixture was heated with stirring and isopropyl alcohol was added to the point of cloudiness and the mixture was stirred overnight. Yellow powder was obtained, 2.85 g, which was recrystallized from methanol, m.p. 178°-179° C.