Wellcome Research Laboratories, Langley Court, Beckenham, Kent, BR3 3BS, UK
Abstract:
The cyclobutyl group is an effective replacement for the linking group required in hydroxyureas for good in vivo activity against 5-Lipoxygenase. The principle is illustrated in two 5-LO inhibitors: 858C, a more potent inhibitor than Zileuton and, 862C, a very poteng 5-LO inhibitor with good oral persistence.