Sulfuric acid magnesium salt (1:1) → HCID 23446882, compound

Participants

Reaction Conditions

Reaction Steps

3.1 g (18.61 mmol) of the compound from Example A4 were added to 2.9 g (17.7 mmol) of 6-methylpyridine-2,3-dicarboxylic anhydride and, after heating to 170° C., stirred as a melt for a total of 8 h. After cooling, the residue was taken up in methylene chloride, and activated carbon and magnesium sulfate were added. The mixture was filtered off with suction and chromatographed on silica gel giving, after concentration, 1.3 g (24.4% of theory) of the title compound as beige crystals of m.p. 173-176° C.

Provenance & Evidence