A process for preparing enantiomers of compounds having muscarinic activity
申请人:MERCK SHARP & DOHME LTD.
公开号:EP0470668A1
公开(公告)日:1992-02-12
A process for preparing a substantially pure enantiomer of a compound of formula (I) or a salt or prodrug thereof:
wherein one of X, Y and Z is an N atom and the remainder are C atoms; and
R2 is hydrogen, halo, -CN, -COOR6, -CONR6R7, or a saturated or unsaturated, substituted or unsubstituted hydrocarbon group, wherein R6 and R7 are independently selected from hydrogen and C1 -2 alkyl;
which process comprises cyclisation of an enantiomer of a compound of formula (19A) or salt thereof:
wherein R2, X, Y and Z are as defined in formula (I); and R4 is a labile leaving group is disclosed. Optionally, the compound so prepared may be converted to a salt or prodrug thereof. A preferred compound is (R)-(-)-3-(6-chloropyrazin-2-yl)-1-azabicyclo[2.2.2]octane or a salt thereof.
Novel substituted pyrazine, formulations thereof and use in medicine
申请人:Merck Sharp & Dohme Limited
公开号:US05073557A1
公开(公告)日:1991-12-17
The compound (R)-3-[2-(6-chloropyrazin)yl]-1-azabicyclo[2.2.2]octane and its salts behave as M.sub.1, M.sub.3 muscarinic agonists and are useful in the treatment of neurological and mental disorders, preferably in a pharmaceutical formulation comprising the active compound in association with a pharmaceutically acceptable carrier. The compound can be prepared by via methods analogous to those known in the art and a chiral acid resolution.
A novel substituted pyrazine, formulations thereof and use in medicine
申请人:MERCK SHARP & DOHME LTD.
公开号:EP0416754A2
公开(公告)日:1991-03-13
The compound (R)-3-[2-(6-chloropyrazin)yl]-1-azabicyclo[2.2.2]octane and its salts behave as M₁, M₃ muscarinic agonists and are useful in the treatment of neurological and mental disorders, preferably in a pharmaceutical formulation comprising the active compound in association with a pharmaceutically acceptable carrier. The compound can be prepared by via methods analogous to those known in the art and a chiral acid resolution.