2(1H)-Pyrimidinone, tetrahydro-1,3-dimethyl- → 6-Bromo-8-chloro-4-isopropyl-7-methoxy-2,2-dimethyl-2H-chromene

Participants

Reaction Steps

Following General Procedure C, isopropylmagnesium chloride (2.0 M in THF, 3.15 mL, 6.29 mmol), 6-bromo-8-chloro-7-methoxy-2,2-dimethyl-chroman-4-one (Compound 9, 400 mg, 1.26 mmol) and 1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidinone (DMPU, 2 mL) in THF was reacted then quenched with 10% HCl, and stored at room temperature for 12 h. Purification by flash chromatography (silica gel, 95:5 hexane/ethyl acetate) afforded the title compound as a yellow oil.

Provenance & Evidence