Dimethyl Sulfoxide → 2-Benzyl-6-bromo-1-oxo-4-phenyl-1,2-dihydroisoquinoline-3-carbaldehyde

Under a nitrogen stream, to a solution of oxalyl chloride (0.54 ml) in THF (28 ml) was added dropwise a solution of DMSO (0.58 ml) in THF (5 ml) at −70° C. or below and the mixture was stirred for 10 min. A solution of 2-benzyl-6-bromo-3-hydroxymethyl-4-phenyl-2H-isoquinolin-1-one (1.30 g) in THF (7 ml) was added dropwise at −70° C. or below and the mixture was stirred at −60° C. to −50° C. for 1 hr. To the reaction mixture was added dropwise triethylamine (3.1 ml) at 50° C. or below and the mixture was allowed to warm to room temperature and stirred for 30 min. To the reaction mixture was added water and the mixture was extracted with ethyl acetate. The organic layer was washed with water and saturated brine, and dried over anhydrous sodium sulfate. The solvent was evaporated under reduced pressure and the obtained residue was crystallized from ethyl acetate-hexane to give the title compound (810 mg).

1. stirringthe mixture was stirred at −60° C. to −50° C. for 1 hr
2. stirringstirred for 30 min
3. extractionthe mixture was extracted with ethyl acetate
4. washThe organic layer was washed with water and saturated brine
5. dry with materialdried over anhydrous sodium sulfate
6. customThe solvent was evaporated under reduced pressure
7. customthe obtained residue was crystallized from ethyl acetate-hexane

ORD record

ord-db44c299562f4bea80090e95d41dd899

Source dataset

uspto-grants-2008_07

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07402595B2