Thionyl Chloride → HCID 18798244, compound

Participants

Reaction Steps

The 1,3,5-trimethyl-6-(3-chloropropylamino)-2,4(1H,3H)-pyrimidinedione prepared from 6.8 g (30 mmol) of 1,3,5-trimethyl-6-(3-hydroxypropylamino)-2,4(1H,3H)pyrimidinedione with thionyl chloride is refluxed for 15 h with 4.5 g (25 mmol) of 1-(2-hydroxyphenyl)piperazine in 140 ml of xylene and 20 ml of tripropylamine. The dark oil obtained after customary work-up is purified by column chromatography on silica gel using dichloromethane/methanol (1-10%). From the product fractions, the fumarate is precipitated from ethyl acetate/ethanol using fumaric acid, yield 5.9 g (47%), m.p. 203-205° C.

Provenance & Evidence