Phosphorus oxychloride → HCID 13787234, compound

Participants

Reaction Steps

A mixture of 1.0 g of 3-(N-p-chlorophenylcarbamoyl)-4-hydroxy-5,6,7,8-tetrahydroquinoline (Example 17a) and 25 mL of phosphorous oxychloride is heated at 80° for 3 hours to obtain a clear solution, and evaporated to dryness. The residue is treated with 400 mL of a 1:1 mixture of ice cold 2N aqueous sodium hydroxide and dichloromethane. The organic phase is separated, dried and evaporated to yield the 4-chloro-3-(N-p-chlorophenylcarbamoyl)-5,6,7,8-tetrahydroquinoline. The mixture of 0.6 g thereof, 1.0 g of O-methylhydroxylamine hydrochloride and 1.65 g of diisopropylethylamine is heated to 100° in a small pressure vessel for 18 hours. The cooled mixture is then triturated with water, dissolved in tetrahydrofuran, dried and evaporated to yield the 4-(O-methylhydroxylamino)-3-(N-p-chlorophenylcarbamoyl)-5,6,7,8-tetrahydroquinoline.

Provenance & Evidence