US 7,538,130 B2
	Hindered amine light stabilizer, methods of making, and compositions
Donald H. Campbell, Hartland, Mich. (US); Donald L. St. Aubin, Commerce Township, Mich. (US); Walter H. Ohrbom, Hartland Township, Mich. (US); and John E. Boisseau, Bloomfield Hills, Mich. (US)
Assigned to BASF Corporation, Wyandotte, Mich. (US)
Filed on Sep. 26, 2005, as Appl. No. 11/234,898.
Prior Publication US 2007/0072964 A1, Mar. 29, 2007
Int. Cl. A61K 31/421 (2006.01); A61K 31/5375 (2006.01); C07D 263/04 (2006.01); C07D 265/04 (2006.01)

U.S. Cl. 514—374  [544/106; 544/158; 548/215; 548/216; 514/231.2]

10 Claims

1. A compound wherein n is 0, 1, 2, or 3; R1, R2, R7, and R8 are each independently alkyl, cycloalkyl, alkylaryl, or aryl, optionally with one or more heteroatoms, with the proviso that R1 and R2 can together form a cycloalkyl group and, independently, R7 and R8 can together form a cycloalkyl group; Y is a sulfur free radical, OR9 or SR9; R3, R4, R5, and R6 are each independently H, alkyl, cycloalkyl, aryl, or alkylaryl, optionally with one or more heteroatoms; and R9 is alkyl, cycloalkyl, aryl, or alkylaryl, with one or more heteroatoms, wherein the one or more heteroatoms comprise a nitrogen or sulfur atom.