反应详情

A mixture of 4,7-dihydro-4,7-dioxo-2-ethoxycarbonyl-6-hydroxy-1H-cyclohepta[b]pyridine-1-acetic acid ethyl ester (1.7 g, described in Example 15) and 1N potassium hydroxide (12 ml) is stirred at room temperature for 2.5 hr. Hydrochloric acid (19%) is added until the mixture is acidic. The precipitate is collected and washed with water, acetone and ether to obtain the title compound, mp > 270° C.

1. customThe precipitate is collected
2. washwashed with water, acetone and ether