Oxalyl chloride → 2-Butoxy-6-chloro-1-oxo-4-phenyl-1,2-dihydroisoquinoline-3-carbonyl chloride

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Reaction Steps

2-Butoxy-6-chloro-1-oxo-4-phenyl-1,2-dihydroisoquinoline-3-carboxylic acid (370 mg) was dissolved in THF(6.0 ml), and oxalyl chloride (170 μl) and DMF (1 drop) were added at 0° C. with stirring. The mixture was stirred at room temperature for 2 hrs. and concentrated under reduced pressure. Toluene was added to the residue and they were boiled together several times to give 2-butoxy-6-chloro-1-oxo-4-phenyl-1,2-dihydroisoquinoline-3-carbonyl chloride.

Provenance & Evidence