CD-45 tyrosine phosphatase [E.C. 3.1.3.48] is an important player in t
he regulation of cell activation and proliferation in hematopoetic cel
ls. As part of a program in immune response modulation, we prepared th
e first series of small organic molecule inhibitors of CD-45. The prep
aration and in vitro screening of these hydroxyphosphonates is describ
ed herein. (C) 1997 Elsevier Science Ltd.