Water → HCID 12701049, compound

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Reaction Steps

The starting material is prepared as follows: The mixture of 500 g of succinic acid anhydride, 471 g of 4-aminopyridine and 5,200 ml of xylene is heated to reflux while stirring and separating the water formed. After 30 minutes 15 ml of methane sulfonic acid are added and refluxing is continued until 5 moles of water are collected, requiring about 4 days. The mixture is cooled to room temperature, the supernatant is decanted off and the suspension combined with 1000 ml of isopropanol. It is stirred for 5 minutes, filtered, the residue washed with 250 ml of isopropanol and dried for 3 days under reduced pressure at room temperature and shortly at 50°, to yield the 1-(4-pyridyl)-pyrrolidin-2,5-dione melting at 232°-235°.

Provenance & Evidence