Cyclin-dependent kinases (CDKs) belong to a class of enzymes that control t
he ability of a cell to enter into and proceed through the cell division cy
cle. Using purine as a scaffold, we have synthesized a number of nanomolar
inhibitors of CDK-2/cyclin E. In this report, the synthesis of a series of
piperidine-substituted purine analogs will be presented, as well as some of
their in vitro and in vivo biological effects.