April 15, 2013

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The following patent record is from the CAplusSM database.

CAPLUS COPYRIGHT 2013 ACS

Patent Number: US 8362006
Title: Processes for preparation of zilpaterol via chlorination of 4-(2-oxo-2,3-dihydrobenzimidazol-1-yl)butyric acid or nitrosation of 8,9-dihydro-2H,7H-2,9a-diazabenzo[cd]azulene-1,6-dione.
Inventor(s): Dubuis, Stephane; Krebs, Oliver
Patent Assignee(s): Intervet International B.V., Neth.
Source: PCT Int. Appl., 54pp. CODEN: PIXXD
Language: English

Abstract:
Processes for preparation of zilpaterol include chlorination of 4-(2-oxo-2,3-dihydrobenzimidazol-1-yl)butyric acid with oxalyl chloride, phosgene, or triphosgene to give the acid chloride and reaction of 8,9-dihydro-2H,7H-2,9a-diazabenzo[cd]azulene-1,6-dione with an inorg. nitrite to give 4,5-dihydroimidazo[4,5,1-jk][1]benzazepin-2,6,7[1H]-trione-6-oxime.

Please note:  Abstracts and Titles for patent records in CAplus are routinely enhanced to better describe the claimed invention. The title of the U.S. granted patent is Processes for making zilpaterol and salts thereof.

 View the full-text here.

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