Patent ID: 7319155

Claim:
A 7,7-disubstituted (5H,9H)-6,8-dioxabenzocycloheptene compound having the structural formula (I): in which: A is a radical —CH 2 —Y or a carboxaldehyde group —C(═O)H; Y is a halogen atom, a hydroxyl radical, a radical —OSO 2 R 2 , or a radical P(O)(OR 3 ) 2 ; R and R 1 , which may be identical or different, are each a hydrogen atom, an alkyl radical, an alkoxy radical, an aryl radical optionally substituted with one, two, three, four or five substituents selected from the group consisting of a halogen atom, the halogen being a chlorine, bromine, iodine or fluorine atom, an alkyl radical, an alkoxy radical, a cyano group and a nitro group; with the proviso that R and R 1 may together form, with the carbon atom from which they depend, a ring member of 5 or 6 carbon atoms; R 2 is an alkyl radical or an aryl radical; and R 3 is an alkyl radical; with the further proviso that R and R 1 cannot simultaneously be a methyl radical when A is the radical —CH 2 OH; and the optical isomers thereof.