Thionyl Chloride → 2-(1,2,3,4-tetrahydroquinolin-1-yl)-4H-pyrido[3,2-e]-1,3-thiazin-4-one monohydrate

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Reaction Steps

The reaction procedure of Example 57 was followed except that 1.339 g (8.5 mmol) of 2-chloronicotinic acid, 13 ml of thionyl chloride, two droplets of DMF, 680 mg of ammonium isothiocyanate, 13 ml of acetone, 2.473 g of 6,8-dibromo-1,2,3,4-tetrahydroquinoline and 8 ml of acetone were used. The product was then recrystallized from a mixture of ethanol and hexane to obtain 2.244 g of 2-(1,2,3,4-tetrahydroquinolin-1-yl)-4H-pyrido[3,2-e]-1,3-thiazin-4-one monohydrate.

Provenance & Evidence