Phosphorus oxychloride → HCID 12862373, compound

Participants

Reaction Steps

From 4.0 g (0.0133 mol) of 2-butyl-4-oxo-4H-pyrido[1,2-a]thieno[2,3-d]pyrimidine-7-carboxamide (Example 24), 100 ml of phosphorus oxychloride and 100 ml of chloroform and refluxing on a steam bath for four hours, following the procedure of Example 27, there is obtained 2.1 g of 2-butyl-4-oxo-4H-pyrido[1,2-a]thieno[2,3-d]pyrimidine-7-carbonitrile; mp 216°-217° C. after recrystallization from pyridine.

Provenance & Evidence