Acetic Acid → HCID 178480811, compound

Participants

Reaction Steps

A mixture of 4-morpholin-4-yl-2-[3-(1,1,2,2-tetramethyl-propylsilanyloxy)-phenyl]-thieno[3,2-d]pyrimidine-6-carbaldehyde (6.67 g, 14.66 mmol), N-methylpiperazine (2.11 mL, 1.3 equivalents) and acetic acid (838 μL, 1.0 eq.) was stirred in 1,2-dichloroethane (70 mL) at room temperature. To this was added sodium triacetoxyborohydride (3.42 g, 1.1 equivalents) and the reaction mixture was stirred for 3 days. The reaction mixture was then quenched with aqueous sodium bicarbonate solution, extracted exhaustively with chloroform, dried (MgSO4), and the solvent removed in vacuo to yield a yellow oil. This was purified using flash chromatography (silica, ethyl acetate to ethyl acetate/methanol) to yield 6-(4-methyl-piperazin-1-ylmethyl)-4-morpholin-4-yl-2-[3-(1,1,2,2-tetramethyl-propylsilanyloxy)-phenyl]-thieno[3,2-d]pyrimidine (6.95 g, 88%).

Provenance & Evidence