2,3-Dichloro-5,6-dicyano-1,4-benzoquinone → 2,4-Dichloro-6-(3-chloro-thiophen-2-yl)-pyrimidine

Participants

Reaction Conditions

Reaction Steps

To a solution of 3-chlorothiophene (384 mg, 3.0 mmol) in THF (6 mL) at −78° C. was added n-BuLi (1.6 M, 2 mL) and the resulting mixture stirred for 45 minutes. The resulting product was added to a solution of 2,4-dichloropyrimidine (430 mg, 2.9 mmol) in ether (10 mL) at −30° C. and the resulting mixture stirred for 30 minutes, then warmed up to 0° C. and stirred for another 30 minutes. DDQ (700 mg, 3 mmol) was added and the resulting mixture was stirred overnight, then filtered through Celite®. The filtrate was concentrated and the residue was purified by silica gel column (EtOAc/hexanes, 1:5) to yield a white solid.

Provenance & Evidence