1-Butanol → 6-(4-Chlorobenzyl)-1-(2,4-dichlorobenzenesulfonyl)-8-isopropyl-3-pyrrolidin-1-yl-hexahydropyrazino[1,2-a]pyrimidine-4,7-dione

Participants

Reaction Conditions

Reaction Steps

32 mg of 6-(4-chlorobenzyl)-1-(2,4-dichlorobenzenesulfonyl)-3-amino-8-isopropylhexahydropyrazino[1,2-a]pyrimidine-4,7-dione hydrobromide (Example 2) were suspended in 1 ml of water, and 2 ml of 1-butanol were added. 1 mmol of potassium carbonate and 200 μl of 1,4-dibromobutane were added to this mixture. The reaction mixture was stirred at 90° C. for 16 hours and evaporated. The residue was suspended in 5% Et3N/ethyl acetate, filtered and evaporated. The pure title compound was removed after purification by HPLC. The system and process described under “general processes” was used for this. MW=612.11 (calculated, monoisotopic); measured value (M+H)+: 613.4.

Provenance & Evidence