反应详情

A mixture of 7-chloro-2,3-dihydro-10-hydroxypyridazino[4,5-b]quinoline-1,4-dione (0.60 g, 2.3 mM), as prepared in Example 2, and hydrocinnamoyl chloride (1.15 g, 6.84 mM) in pyridine (9 mL) was refluxed for 1 hr. Upon cooling to room temperature, the solution solidified. After 2 hr at room temperature, the mixture was diluted with water (60 mL) and the solids broken up with a glass rod to provide a free-flowing aqueous suspension which was stirred for 1 hr. The solids were collected, washed with water (10 mL), and resuspended in 50% aqueous methanol (60 mL). After stirring for 15 minutes, this suspension was filtered and the collected solids were washed with 50% aqueous methanol (10 mL) and then sucked dry under a stream of nitrogen to provide a tan solid. This material was dried for 2.5 days in vacuo (50 mTorr) at 100° C. and then was recrystallized from dimethylsulfoxide/methanol. The title compound was obtained (0.40 g, 44%), after drying 24 hr in vacuo (50 mTorr) at 100° C., as an off-white powder, mp>300° C.

1. temperaturewas refluxed for 1 hr
2. customto provide a free-flowing aqueous suspension which
3. customThe solids were collected
4. washwashed with water (10 mL)
5. stirringAfter stirring for 15 minutes
6. filtrationthis suspension was filtered
7. washthe collected solids were washed with 50% aqueous methanol (10 mL)
8. customsucked dry under a stream of nitrogen
9. customto provide a tan solid
10. customThis material was dried for 2.5 days in vacuo (50 mTorr) at 100° C.
11. customwas recrystallized from dimethylsulfoxide/methanol