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.
一种制备公式(I)化合物的基本纯对映体或其盐或前药的方法:其中X、Y和Z中的一个是N原子,其余为C原子;和R2是氢、卤素、-CN、-COOR6、-CONR6R7,或饱和或不饱和、取代或未取代的烃基,其中R6和R7独立选择自氢和C1-2烷基;所述方法包括将公式(19A)化合物的对映体或其盐环化:其中R2、X、Y和Z如公式(I)中定义;和R4是一种易离去基团。 可选地,所制备的化合物可以转化为其盐或前药。一种首选化合物是(R)-(-)-3-(6-氯吡嗪-2-基)-1-氮杂双环[2.2.2]辛烷或其盐。