The invention provides a process for preparing compounds, as a single enantiomer or mixture of enantiomers, represented by the formula: ##STR1## in which: X and Y are independently hydrogen, hydroxy, lower alkyl, lower alkoxy or halo, or X and Y taken together is methylenedioxy or ethylene-1,2-dioxy, and Z is --SO.sub.2 R or --C(O)NR.sup.3 R.sup.4, in which; R is lower alkyl, optionally substituted phenyl, --(CH.sub.2).sub.m OR.sup.1 or --NR.sup.1 R.sup.2 wherein m is an integer of 1 to 6 and R.sup.1 and R.sup.2 are independently hydrogen or lower alkyl; and R.sup.3 and R.sup.4 are independently hydrogen, alkyl, optionally substituted phenyl or phenyl lower alkyl; or R.sup.1 and R.sup.2 taken together with the nitrogen to which they are attached or R.sup.3 and R.sup.4 taken together with the nitrogen to which they are attached represent a heterocycle of the formula: ##STR2## wherein A is --CH.sub.2 --, --NR.sup.1 -- or oxygen; and novel intermediates.
本发明提供了一种制备化合物的方法,该化合物可以是单一对映体或对映体混合物,其
化学式为:##STR1##
其中:X和Y独立地为氢、羟基、较低的烷基、较低的烷氧基或卤素,或X和Y共同为亚甲二氧基或
乙烯-1,2-二氧基;Z为--SO.sub.2 R或--C(O)NR.sup.3 R.sup.4,其中;R为较低的烷基、可选的取代苯基、--(CH.sub.2).sub.m OR.sup.1或--NR.sup.1 R.sup.2,其中m为1至6的整数,R.sup.1和R.sup.2独立地为氢或较低的烷基;R.sup.3和R.sup.4独立地为氢、烷基、可选的取代苯基或苯基较低烷基;或者R.sup.1和R.sup.2与它们连接的氮或R.sup.3和R.sup.4与它们连接的氮共同表示为下列式的杂环:##STR2##
其中,A为--CH.sub.2 --、--NR.sup.1 --或氧;还提供了新的中间体。