Patent ID: 7619116

Claim:
A compound of formula (II) wherein Q represents an oxygen or sulfur atom, R 3 represents a halogen atom or an —NR 5 R 2 group, R 4 represents a hydrogen atom, a (C 1 -C 7 )alkyl, aryl, (C 1 -C 7 )acyloyl or aryloyl group, or QR 4 represents an isothiocyanate, or thioamidine group when Q is a sulfur or QR 4 represents a (C 1 -C 7 )alkylisourea, tri(C 1 -C 7 )alkylsilyloxy, tosyloxy, nosyloxy, trifluoroacetyloxy, trifluoromethanesulfonyloxy or mesyloxy group when Q is an oxygen, R 5 and R 2 represent, simultaneously or independently of one another, a hydrogen atom or a (C 1 -C 7 )alkyl, aryl, (C 1 -C 7 )alkylaryl, (C 1 -C 7 )acyloyl, aryloyl, (C 1 —C 7 )alkyloxycarbonyl or aryloxycarbonyl group, —NR 5 R 2 can also represent an —NHR 2 group where R 2 is a protective group, means that there does not exist a bond so as to form a ring, Y represents means that there exists a single bond.