Structure-affinity relationships of 12-sulfonyl derivatives of 5,8,8a,9,10,11,12,12a,13,13a-decahydro-6H-isoquino[2,1-g][1,6]naphthyridines at .alpha.-adrenoceptors
作者:Robin D. Clark、David B. Repke、Jacob Berger、Janis T. Nelson、Andrew T. Kilpatrick、Christine M. Brown、Alison C. MacKinnon、Ruth U. Clague、Michael Spedding
DOI:10.1021/jm00106a036
日期:1991.2
dependent on the stereochemistry of the tetracyclic system. The 8a beta,12a alpha,13a alpha diastereomer of 1 (56) had moderate affinity for alpha 2-adrenoceptors while the 8a beta,12a beta,13a alpha diastereomer (55) had very low affinity. The affinity and selectivity of these agents for alpha 2-adrenoceptors was found to correspond to that observed for several isomeric yohimbine analogues which have
Decahydro-8H-isoquino[2,1-g][1,6]naphthyridine and decahydrobenzo[a]pyrrolo[2,3-e]quinolizine derivatives
申请人:SYNTEX (U.S.A.) INC.
公开号:EP0524004A1
公开(公告)日:1993-01-20
Compounds of the formula
wherein:
X and Y are independently hydrogen; hydroxy; lower alkyl of 1-6 carbon atoms; lower alkoxy of 1-6 carbon atoms; or halo; or X and Y when adjacent and taken together are methylenedioxy or ethylene-1,2-dioxy;
R is lower alkyl of 1-6 carbon atoms; cycloalkyl of 3-8 carbon atoms; phenyl or phenyl lower alkyl in which any phenyl group may be optionally substituted by one or two substituents chosen from the group consisting of halo, lower alkyl of 1-4 carbon atoms and lower alkoxy of 1-4 carbon atoms; or -ANHSO₂R¹; wherein A is lower alkylene of 1-6 carbon atoms; and R¹ is lower alkyl of 1-6 carbon atoms or -NR²R³; wherein
R² and R³ are independently hydrogen or lower alkyl of 1-6 carbon atoms, or R² and R³ taken together are cycloalkyl of 3-8 carbon atoms; and
n is 1 or 2;
and the pharmaceutically acceptable salts thereof, are useful as α₂-adrenoceptor antagonists, in particular as peripherally selective α₂ -adrenoceptor antagonists.
Process for the preparation of (8aS,12aS,13aS)-decahydroisoquino[2,1-g][1,6]-naphthyridin-8-one derivatives
申请人:SYNTEX (U.S.A.) INC.
公开号:EP0505183A2
公开(公告)日:1992-09-23
The invention provides a process for preparing single enantiomers of compounds represented by the formula :
and chiral acid addition salts thereof ;
wherein :
X and Y are independently hydrogen ; lower alkyl ; lower alkoxy; or halo; or X and Y taken together is methylenedioxy or ethylene-1,2-dioxy;
which includes reduction of a compound represented by the formula :
to give a mixture of stereoisomers represented by the formula :
wherein each wavy line independently represents a bond in either the α or β position ;
followed by dissolving the mixture of stereoisomers and a chiral resolving acid in a suitable solvent and allowing the solution to crystallize, giving a salt of the desired enantiomer.