Pyridine → N-(5-chloro-pyridin-2-yl)-2-(4-cyano-benzoyl-amino)-5-methoxy-benzamide hydrochloride

Participants

Reaction Conditions

Reaction Steps

To a 780 L Hastelloy reactor, was charged 4-cyanobenzoyl chloride (E) (17.2 kg, 1.1 eq.) and THF (92 kg, 3.5 parts). Reactor contents were agitated at 22° C. (19-25° C.) until all of the solids had dissolved. The resulting solution was transferred to a lower receiver and the reactor was rinsed forward with THF (26 kg, 1 part). Compound D (26.4 kg, 1 eq.), THF (396 kg, 15 parts) and pyridine (2.90 kg, 0.4 eq.) were charged to a clean reactor. The pump and lines were rinsed forward with THF (34 kg, 1.3 parts). Via a metering pump, the 4-cyanobenzoyl chloride/THF solution was charged to the reactor, keeping the temperature at <30° C. and rinsing forward with THF (ca. 10 kg). The resulting yellow-colored slurry was agitated at 22° C. (19-25° C.) for ca 2 hrs. In-process HPLC taken after 2 hrs showed a compound of Formula D content of 0%, indicating completion of the reaction. The slurry was filtered onto a pressure nutsche fitted with a filter cloth. The reactor, pump, lines and wet cake were rinsed with three portions of ethanol (ca. 15 kg each). The wet filter cake was discharged (65.4 kg) and transferred back to the reactor for slurry wash in ethanol (317 kg, 12 parts) at 22° C. (19-25° C.) for ca. 1 hr. The slurry was filtered onto the pressure nutsche and the reactor, pump, lines, and wet filter cake were rinsed with two portions of ethanol (ca. 15 kg each) and two portions of THF (ca. 15 kg each). The wet filter cake was dried under vacuum with a maximum temperature of warm glycol bath (to heat the dryer jacket) of 40° C. After 14.5 hrs of drying, LOD was 0.75%. The dried material was milled (screen 0.125″) to give 31.8 kg of product, which was dried under vacuum for another 10.5 hrs. LOD after drying was 1.8%, and the product was discharged (31.5 kg) in 74.8% yield (expected 60-90%). HPLC showed 100% purity.

Provenance & Evidence