Ethyl 5-aminocarbonyl-4,6-diethoxy-2-(trifluoromethyl)-3-pyridinecarboxylate → Ethyl 5-cyano-4,6-diethoxy-2-(trifluoromethyl)-3-pyridinecarboxylate

Participants

Reaction Steps

A mixture of 6.17 g (0.018 mol) of product of Example 23 and 100 ml of POCl3 was held at reflux for 7 hours and concentrated in vacuo. The residue was poured into water and extracted with ether. The ether extract was washed with 15% K2CO3, dried (MgSO4) and concentrated to give 1.44 g (24.6%) of product as an oil; nD25 1.4677.

Provenance & Evidence