Design and optimization of cyclized NK1 antagonists with controlled atropisomeric properties

Autor: John Evenden, William L. Rumsey, David Aharony, Brian B. Masek, Gerard M. Koether, William Potts, Cyrus John Ohnmacht, Bruce Dembofsky, Bernstein Peter Robert, Jeffrey S. Albert
Rok vydání: 2004
Předmět:
Zdroj: Tetrahedron. 60:4337-4347
ISSN: 0040-4020
DOI: 10.1016/j.tet.2004.03.054
Popis: We have previously described a series of antagonists that showed high potency and selectivity for the NK1 receptor. However, these compounds also had the undesirable property of existing as a mixture of four interconverting rotational isomers. Through biological and structural analysis of the atropisomers, a binding model was developed and used to guide the design of compounds, which were rigidified by installation of a cyclizing linkage. These compounds existed as a mixture of two atropisomers. Further elaboration of the ring system reinforced the desired conformation and eliminated atropisomeric properties. We found that the region distal to the 8-membered ring system could be modified while retaining NK1 potency, and optimization led to further improvements in the in vivo activity.
Databáze: OpenAIRE