| prov:value
| - Engl., 1998, 37, 2046].Intermediates of formula (7) may be prepared by reaction of a compound of formula (8) with an alkylating agent of formula Cy1(Alk1)nZ, where Z is a leaving group such as a halogen atom, e.g. a chlorine, bromine or iodine atom, or a suiphonyloxy group such as an alkylsulphonyloxy, e.g. trifluoromethylsulphonyloxy, or arylsuiphonyloxy, e.g. phenylsuiphonyloxy, group.The reacti
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