Exploring the role of bromine at C(10) of (+)-4-[2-[4-(8-chloro-3,10-dibromo- 6,11-dihydro-5H-benzo[5,6]cyclohepta[1,2-b]pyridin-11(R)-yl)-1-piperidinyl]-2- oxoethyl]-1-piperidinecarboxamide (Sch-66336): the discovery of indolocycloheptapyridine inhibitors of farnesyl protein transferase.
J Med Chem
; 45(18): 3854-64, 2002 Aug 29.
Article
en En
| MEDLINE
| ID: mdl-12190309
ABSTRACT
The 10-bromobenzocycloheptapyridyl farnesyl transferase inhibitor (FTI) Sch-66336 (1) is currently under clinical evaluation for the treatment of human cancers. During structure-activity relationship development leading to 1, 10-bromobenzocycloheptapyridyl FTIs were found to be more potent than analogous compounds lacking the 10-Br substituent. This potency enhancement was believed to be due, in part, to an increase in conformational rigidity as the 10-bromo substituent could restrict the conformation of the appended C(11) piperidyl substituent in an axial orientation. A novel and potent class of FTIs, represented by indolocycloheptapyridine Sch-207758 [(+)-10a], have been designed based on this principle. Although structural and thermodynamic results suggest that entropy plays a crucial role in the increased potency observed with (+)-10a through conformational constraints and solvation effects, the results also indicate that the indolocycloheptapyridine moiety in (+)-10a provides increased hydrophobic interactions with the protein through the addition of the indole group. This report details the X-ray structure and the thermodynamic and pharmacokinetic profiles of (+)-10a, as well as the synthesis of indolocycloheptapyridine FTIs and their potencies in biochemical and biological assays.
Buscar en Google
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Piperidinas
/
Piridinas
/
Bromo
/
Transferasas Alquil y Aril
/
Inhibidores Enzimáticos
/
Indoles
/
Antineoplásicos
Límite:
Animals
Idioma:
En
Revista:
J Med Chem
Asunto de la revista:
QUIMICA
Año:
2002
Tipo del documento:
Article
País de afiliación:
Estados Unidos