Benzyl Bromide → HCID 59395754, compound

Participants

Reaction Steps

A solution of 3-butyl-8-chloro-1-[4-(1H-imidazol-4-yl)butyl]-7-(2-propen-1-yl)-3,7-dihydro-1H-purine-2,6-dione (300 mg, 0.77 mmol) in anhydrous THF (5 ml) was treated with benzyl bromide (144 mg, 0.84 mmol) and DIPEA (147 μl, 0.84 mmol). The mixture was left to stir at rt under nitrogen for 4 days. The mixture was partitioned between EtOAc and 2M HCl (aq). The organic layer was separated, washed with brine, dried (MgSO4) and concentrated. The crude was purified by a silica SPE column using a 0.5-5% MeOH/DCM gradient. The product fractions were combined and concentrated under high vacuum. The product was dissolved in THF (5 ml) then Pd(PPh3)4 (88 mg, 0.077 mmol) and morpholine (670 μl, 7.67 mmol) were added and the mixture left to stir at rt under nitrogen for 3 h. 88 mg of Pd(PPh3)4 (0.077 mmol) was added and the mixture was left to stir at rt under nitrogen for 16 h. The mixture was partitioned between EtOAc and H2O. The organic layer was separated and the aqueous layer was extracted with EtOAc (×2). The organic layers were combined, washed with brine, dried (MgSO4) and concentrated. The crude product was purified by MDAP to give the title compound as a white solid (9 mg, 2%).

Provenance & Evidence