Patent number: 5118678
Abstract: A compound of the structure ##STR1## wherein R.sup.1 and R.sup.2 are each, independently, hydrogen or --CONH(CR.sup.3 R.sup.4).sub.n --X;R.sup.3 and R.sup.4 are each, independently, hydrogen, alkyl, aralkyl, cycloalkyl, halogen, or trifluoromethyl;X ix hydrogen, lower alkyl, cycloalkyl, trifluoromethyl, nitro, alkoxy, carboalkoxy, aralkyl, halo, dialkylamino, thioalkyl, or Y;Y is a phenyl group which may be optionally mono-, di-, or tri- substituted with a group selected from alkyl, aralkyl, alkoxy, cyano, halo, nitro, carbalkoxy, trifluoromethyl, dialkylamino, or alkylthio;n=0-5;with the proviso that R.sup.1 and R.sup.2 are not both hydrogen and when n=0, X is lower alkyl, cycloalkyl, aralkyl, or Y;or a pharmaceutically acceptable salt thereof when X is dialkylamino, which by virtue of its immunosuppressive activity is useful in treating transplantation rejection, host vs.
Type:
Grant
Filed:
April 17, 1991
Date of Patent:
June 2, 1992
Assignee:
American Home Products Corporation
Inventors:
Wenling Kao, Robert L. Vogel, John H. Musser