Ammonia → 7-Amino-6-nitrothieno[3,2-b]pyridine

Participants

Reaction Steps

To a suspension of 2.55 g of 7-chloro-6-nitrothieno[3,2-b]pyridine 15 in 130 ml of 2-propanol is introduced excess anhydrous ammonia at 45° C. (bath temperature) during 4 hours and the mixture is evaporated in vacuo. The residue is suspended in water, collected by filtration, and then washed with water and ether to give 2.30 g (99%) of Compound 16. An analytical sample is recrystallized from chloroform methanol, affording yellow crystals melting at 266°-268.5° C.

Provenance & Evidence