HCID 70621019, compound → HCID 70621335, compound

Participants

Reaction Steps

A mixture of 7,10-dihydro-4,10-dioxo-2-methyl-7-propynyl-4H-furo[3', 2': 3,4]cyclohepta[1,2-b]pyridine-6-carboxylic acid ethyl ester (2.0 g, described in Example 24) and 19% hydrochloric acid (60 ml) is refluxed for 45 minutes and cooled to room temperature. The precipitate of the title compound is collected, washed with acetone and crystallized from pyridine to obtain crystals of the pyridine salt of the title compound, mp 292°-295° C.

Provenance & Evidence