Some synthetic approaches to ropinirole (sk&f 101468-a): A potent dopamine receptor agonist
作者:J. D. Hayler、S. L. B. Howie、R. G. Giles、A. Negus、P. W. Oxley、T. C. Walsgrove、S. E. Walsh、R. E. Dagger、J. M. Fortunak、A. Mastrocola
DOI:10.1002/jhet.5570320334
日期:1995.5
Three new routes to ropinirole (SK&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.