The synthesis of some cyclopentane-bridged indolocarbazoles, representing c
arbocyclic analogues of the natural product K-252a, has been achieved by a
concise, convergent route, and the ring expansion of one compound to a Stau
rosporine-type derivative demonstrated. The products are potent inhibitors
of protein kinase C (PKC). (C) 1999 Elsevier Science Ltd. All rights reserv
ed.