Patent number: 6258820
Abstract: Compounds of the formula:
wherein:
Ra is iodo, (C1-C4)hydroxyalkyl, benzyloxy, OCF3, SCF3, SO3H, SO2F, SO2NR2R3 where R2 is hydrogen or (C1-C4)alkyl and R3 is hydrogen, (C1-C4)alkyl, or phenyl, NR2R4 where R2 is hydrogen or (C1-C4)alkyl and R4 is phenyl; or a group of the formula
wherein R5 and R6 are each independently, hydrogen, (C1-C4)alkyl, or (C1-C4) perfluoroalkyl, and R7 is hydrogen, halo, hydroxy, (C1-C4)alkyl, (C1-C4)alkoxy, (C1-C4)hydroxyalkyl, or N(R2)2, where R2 is hydrogen or (C1-C4)alkyl;
n is an integer of 1-4;
Rb is each, independently, hydrogen, halo, hydroxy, mercapto, (C1-C4)alkyl, (C1-C4)alkoxy, (C1-C4)thioalkyl, (C1-C4)hydroxyalkyl, nitro, cyano, methylenedioxy, ethylenedioxy, COCH3, CF3, OCF3, SCF3, COOH, SO3H, SO2F, phenyl, or phenyl substituted by a group selected from halo, hydroxy, mercapto, (C1-C4)alkyl, (C1-C4) alkoxy, (C1-C4)thioalkyl, (C1-C4)hydroxyalkyl, amino, nitro, cyano, CF3, COOH, SO3H, SO2NR2R3, SO2F where R2 is H or (C1-C4)alkyl and
Type:
Grant
Filed:
July 20, 1999
Date of Patent:
July 10, 2001
Assignee:
Parker Hughes Institute
Inventors:
Faith M. Uckun, Xing-Ping Liu, Rama Krishna Narla