The first solid-phase synthesis of zatebradine I and its analogues is repor
ted. This has resulted in the preparation of compounds with increased abili
ty to reduce the spontaneous beating of isolated guinea-pig atria in a conc
entration-dependent manner. One example, 8g, showed a maximum reduction of
beating of 80% at 3 muM compared to a reduction of 40% at 3 muM with zatebr
adine 1. (C) 2001 Elsevier Science Ltd. All rights reserved.