Patent ID: 6521753
Filing Date: 2003-02-18
Classification: C07D

Abstract:
A compound comprising the formula: wherein R1 is C1-C18 alkyl, allyl, phenyl, mono- or disubstituted phenyl, phen(C1-C4)alkyl, or (C1-C4)alkoxycarbonyl (C1-C4)alkyl, R2 and R3 are each independently C1-C4 alkyl, phenyl, mono- or di-substituted phenyl, benzyl, or combined to form a cyclic ring that is a cyclohexyl, norbornyl or adamantyl ring, R4 is hydrogen, hydroxy, trichloromethyl, trifluoromethyl, formyl, C1-C4 alkyl, halogen, C1-C4 alkoxy, nitro, cyano, C1-C4 monohaloalkyl, C1-C4 alkoxycarbonyl, or an aromatic sharing the two adjacent carbon atoms with the benzene portion of the pyran ring to form a condensed aromatic ring, and x equals 1, 2, or 3.