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CAPLUS COPYRIGHT 2013 ACS
||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.
||Dubuis, Stephane; Krebs, Oliver
||Intervet International B.V., Neth.
||PCT Int. Appl., 54pp. CODEN: PIXXD
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]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.
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