
Journal of Heterocyclic Chemistry p. 875 - 882 (1995)
Update date:2022-08-03
Topics:
Hayler
Howie
Giles
Negus
Oxley
Walsgrove
Walsh
Dagger
Fortunak
Mastrocola
Three new routes to ropinirole (SK and F 101468-A, 1) are described each involving the preparation of 3-chlorooxindole intermediates of type 3 from β-nitrostyrenes as the pivotal step. The superiority of sulphonate esters 17a-c as direct precursors to 1 over the bromide 11 is also described.
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