3-Chlorophenylacetic acid → 2-(3-chlorophenyl)acetyl Chloride

A suspension of 3-chlorophenylacetic acid (2 mmole) in thionyl chloride (10 ml) was refluxed for 1 hour. The excess thionyl chloride was removed under reduced pressure to yield crude 3-chlorophenyl acetic acid chloride. This crude residue was redissolved in dichloromethane (10 ml) and this solution was added to a solution of 4-(piperazin-1-yl)-6-chloro-pyrido[3,2-d]pyrimidine (2 mmole) in dichloromethane (10 ml). The resulting mixture was stirred at room temperature for 1 hour. The solvents were removed by evaporation in vacuo. The crude residue was purified by silica gel column chromatography, the mobile phase being a MeOH/dichloromethane mixture in a ratio of 1:40, affording the pure title compound (yield 60%) as a yellowish solid which was characterized by its mass spectrum as follows: MS (m/z): 403.1 ([M+H]+, 100).

1. temperaturewas refluxed for 1 hour
2. customThe excess thionyl chloride was removed under reduced pressure

ORD record

ord-2aa324f1f365433eae18a93303dfd35f

Source dataset

uspto-grants-2012_07

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08232278B2