Formaldehyde → HCID 118021888, compound

Participants

Reaction Conditions

Reaction Steps

A solution of tert-butyl 4-(5-(1-(4-fluorophenyl)-2-methoxy-2-oxoethyl)pyrimidin-2-yl)piperazine-1-carboxylate (650 mg, 1.5 mmol) in THF (20 mL, dry) was cooled to −78° C. and protected with N2. Another solution of n-BuLi (1.5 M, 3 mL, ˜4.5 mmol) in THF was added to the above cooled solution during 5 min. The reaction mixture was stirred at −78° C. for 1 h, followed by the addition of paraformaldehyde (405 mg, 15.0 mmol) in one portion under −78° C. This solution was stirred at RT overnight. The reaction was quenched by saturated aqueous NH4Cl (50 mL) and water (50 mL), and extracted with EtOAc (50 mL*4). The combined organic layer were washed with brine, dried over Na2SO4, filtered and concentrated under reduced pressure. The residue was purified by silica gel column eluting with PE:EA (4:1) to obtain the title compound as a yellow thicky oil (300 mg, 44% yield). MS (ES+) C23H29FN4O5 requires: 460. found 461 [M+H]+; purity: 93% (UV214).

Provenance & Evidence