A process is disclosed for the preparation of a compound of formula (I): ##STR1## where Ar is aryl or substituted aryl and R.sup.3 and R.sup.4 are the same or different and each is alkyl, which process comprises hydrognating a compound of formula (II): ##STR2## wherein Ar, R.sup.3 and R.sup.4 are as defined with respect to formula (I) and Hal is a halogen atom. Compounds of formula (I) are useful as chemical intermediates.
公开了一种制备式(I)化合物的过程:##STR1## 其中Ar是芳基或取代芳基,R.sup.3和R.sup.4相同或不同,且每个都是烷基,该过程包括加氢化式(II)的化合物:##STR2## 其中Ar,R.sup.3和R.sup.4与式(I)相对应定义,Hal是卤素原子。式(I)化合物可用作
化学中间体。