Cyclization-activated prodrugs. Basic esters of 5-bromo-2'-deoxyuridine
摘要:
Some 3'- and 5'-[[(alkylamino)ethyl]glycyl] esters of 5-bromo-2'-deoxyuridine were prepared and evaluated in vitro as progenitors of the parent alcohol. The esters proved to be relatively stable at low pH but released 5-bromo-2'-deoxyuridine cleanly at rates which were pH and structure dependent. These basic esters are examples of cyclization-activated prodrugs in which generation of active drug is not linked to enzymatic cleavage but rather results from an intramolecular cyclization-elimination reaction.
[EN] CGRP RECEPTOR ANTAGONISTS<br/>[FR] ANTAGONISTES DE RÉCEPTEURS DE CGRP
申请人:MERCK SHARP & DOHME
公开号:WO2010107605A1
公开(公告)日:2010-09-23
Compounds of Formula (I) (wherein variables A1, A2, A3, ring-B, m, n, J, E1, E2, E3, R5, RPG and Y are as described herein), which are useful as antagonists of CGRP receptors, and useful in the treatment or prevention of diseases in which CGRP receptors are involved, such as headache, and in particular migraine and cluster headache. The invention is also directed to pharmaceutical compositions comprising the compounds of formula (I) and the use of these compounds and compositions in the prevention or treatment of diseases in which CGRP receptors are involved.
Compounds of Formula (I) (wherein variables A
1
, A
2
, A
3
, ring-B, m, n, J, E
1
, E
2
, E
3
, R
5
, RPG and Y are as described herein), which are useful as antagonists of CGRP receptors, and useful in the treatment or prevention of diseases in which CGRP receptors are involved, such as headache, and in particular migraine and cluster headache. The invention is also directed to pharmaceutical compositions comprising the compounds of formula (I) and the use of these compounds and compositions in the prevention or treatment of diseases in which CGRP receptors are involved.