Magnesium monoxide → HCID 22759130, compound

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Reaction Steps

To a solution of 5 gm. of di(tris-hydroxymethyl) methylammonium 10-chloro-1,4,6,9-tetrahydro-4,6-dioxopyrido[4,3-g]quinoline-2,8-dicarboxylate in 100 ml. of water is added 2.0 g. of 5% palladium-on-charcoal catalyst and 5.0 g. of magnesium oxide. The resulting mixture is hydrogenated at an initial pressure of 3 atmospheres of hydrogen until 1 mole of hydrogen has been absorbed. The mixture is filtered and the filtrate acidified by the addition of dilute hydrochloric acid. The resulting precipitate is removed by filtration. The 1,4,6,9-tetrahydro-4,6-dioxopyrido[3,2-g]quinoline-2,8-dicarboxylic acid obtained is converted to di(tris-hydroxymethyl)methylammonium 1,4,6,9-tetrahydro-4,6-dioxopyrido[3,2-g]quinoline-2,8-dicarboxylate by adding two equivalents of (tris-hydroxymethyl)methylamine in aqueous solution. The crystalline product is recovered after addition of methanol.

Provenance & Evidence