Hydroxyl-substituted-2-chloro-.alpha.-(Tert-butylaminomethyl)-benzylalcohol s of the formula: ##STR1## and process for their production are disclosed. These compounds are useful as bronchodilators.
The kinetics of racemization of meluadrine tartrate in aqueoussolution was investigated by HPLC, over the pH range of 1.2 to 12 at 40, 60 and 80 degrees C. The racemization was followed by measuring both the residual (R)-enantiomer and formed (S)-enantiomer of meluadrine. The pH-racemization rate profile of meluadrine showed a minimum racemization rate constant between pH 4 and 6, and the rate constant