Pyridine → HCID 19002334, compound

Participants

Reaction Conditions

Reaction Steps

The acid prepared in Example 610 (2.6 g) is heated with 75% strength thionyl chloride (50 ml) for 8 hours. The mixture is taken up in dichloromethane and concentrated. The oil obtained (1.4 g) is dissolved in methylene chloride (30 ml) and cooled to about 3° C. A solution of N-methyl-N-ethylamine (0.54 g) and pyridine (0.3 g) in methylene chloride (30 ml) is added, keeping the temperature lower than 5° C. The mixture is stirred for 6 hours 20 minutes at ambient temperature. It is poured into water and extracted with methylene chloride. The mixture is dried over sodium sulphate and concentrated. An orange precipitate (1.2 g; yield=82.2%) is obtained, m.p. 110° C. (compound no. 611).

Provenance & Evidence