Hydrochloric Acid → HCID 69205088, compound

Participants

Reaction Steps

2.3 g of nitro derivative (14) prepared above and about 100 ml of methanol were introduced into a 200 ml autoclave (hydrogenator) equipped with a magnetic stirrer. The solution obtained was degassed with nitrogen. 0.4 g of palladium-on-charcoal (5% humidity, containing 50% water) was added thereto. The reaction mixture was stirred, while flushing once with hydrogen, and hydrogen was then introduced to a pressure of about 5 bar. After reaction for 4 hours, the reactor was flushed with nitrogen. The reaction mixture was filtered quickly through Celite under a gentle pressure of nitrogen. The filtrate was recovered into a precooled solution of methanol containing about 3 equivalents of hydrogen chloride gas. The filter cake was rinsed several times with methanol under a stream of nitrogen. The solution thus obtained was concentrated and then treated with ether. The product obtained, in the form of a pale pink paste, was stirred and then rinsed several times with acetonitrile and with ether under nitrogen. 2.1 g of expected product (15) were isolated in the form of a slightly pink-white powder.

Provenance & Evidence