Catalysts for selective epoxidation of olefin with air

摘要

Catalysts for the selective oxidation of olefins in the presence of air or oxygen, contain compounds of formula MoxOy(L)z (1), where x = 1, 2 or 3; y = 1 to 2x+1; z = 1 to 2x; 2y+z = 5 or 6; L = ligand of formula (2)-(5); n = 0 or 1 (in formula 3), or 1 or 2 (in 4); m = 1-6; X = nitrogen, oxygen or sulphur; Y = H, 1-8C alkyl or alkoxy, F, Cl, Br, I, COOCH3, 6-14C aryl or 3-8C cycloalkyl; R<3>, R<4> = a 4-8C ring onto which 1 or 2 aromatic rings may be condensed; R<1>, R<2> = H, or linear or branched 1-2C alkyl or haloalkyl substituents on rings formed as above; and R = H, 1-8C alkyl or alkoxy, COOCH3, carbonyl oxygen, 6-14C aryl or 3-8C cycloalkyl.