Patent ID: 7906495
Filing Date: 2011-03-15
Classification: C07C

Abstract:
1. A compound of formula (I) wherein: X represents a halogen atom selected from chlorine, bromine and iodine and A is selected from any of the moieties corresponding to formulas (A2) and (A3) in which: Z and Z′ are independently selected from hydrogen, a hydroxyl group and an —OR protected hydroxyl group, where R is a hydroxyl protective group; and R1, R2 and R3 are independently selected from hydrogen, halogen, a hydroxyl group, C1-C6 alkyl or C1-C6 alkenyl, optionally substituted with halogen, hydroxyl, cyano or amino, or a dialkyl(C1-C5)ether or alkyl(C1-C5)amino group, and an —OR protected hydroxyl group wherein R is a hydroxyl protective group.