Trans-2,6-,3,6-and 4,6-diaza-5,6,6a,7,8,12b-hexahydrobenzo[c]phenanthrene compounds as dopamine agonists
AssigneeAbbott Laboratories
InventorsKazumi Shiosaki, Yu Gui Gu, Michael Michaelides
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Abstract
A tetracyclic compound of the formula: ##STR1## wherein A and the atoms to which it is attached comprise a pyridine ring selected from: ##STR2## wherein R.sup.1, R.sup.2, and R.sup.3 are specifically defined, which compounds are useful in the treatment of dopamine-related neurological, psychological and cardiovascular disorders as well as in the treatment of substance abuse and other addictive behavior disorders, cognitive impairment and attention deficit disorder, and methods for the preparation thereof.
Claims24
The compound having the formula:
- ##STR27## or a pharmaceutically-acceptable salt, ester, carbamate or prodrug thereof,
- wherein:
- R.sup.1 is hydrogen or a readily-cleavable group;
- A and the atoms to which it is attached comprise a pyridine ring selected from the
- group consisting of:
- ##STR28## (a) and ##STR29## wherein one of X and Y is N and the other is CR.sup.2, and
- R.sup.2 and R.sup.3 are independently selected from the group consisting of
- hydrogen, Cl, Br, F, C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 -alkoxy or C.sub.1 -C.sub.6 -haloalkyl;
- or additionally, one of R.sup.2 and R.sup.3 may be C.sub.3 -C.sub.7 -cycloalkyl;
- or when on adjacent carbon atoms R.sup.2 and R.sup.3 may be taken together with the atoms to which they are attached to form a C.sub.5 -C.sub.7 -cycloalkene ring.
A process for the preparation of a compound having the formula ##STR35## wherein Q is a protecting group and one of X and Y is N and the other is CR.sup.2, wherein R.sup.2 and R.sup.3 are independently selected from the group consisting of hydrogen, Cl, Br, F, C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 -alkoxy or C.sub.1 -C.sub.6 -haloalkyl;
- the method comprising
- reacting a compound having the formula ##STR36## wherein Q, X, Y, R.sup.2 and R.sup.3 are as above with an excess of zinc dust and aqueous HCl, and isolating the product compound.
A process for the preparation of trans-diaza-5,6,6a,7,8,12b-hexahydro-benzo[c]phenanthrene 10,11-diols having the Formula ##STR42## wherein R.sup.1 is hydrogen or a readily-cleavable group, wherein X.dbd.N and Y.dbd.CR.sup.2 or Y.dbd.N and X.dbd.CR.sup.2, and R.sup.2 and R.sup.3 are independently selected from the group consisting of hydrogen, Cl, Br, F, C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 -alkoxy or C.sub.1 -C.sub.6 -haloalkyl;
- the method comprising:
- (a) treating a compound having the formula ##STR43## wherein X.dbd.N and Y.dbd.CR.sup.2 or Y.dbd.N and X.dbd.CR.sup.2, R.sup.2 and R.sup.3 are as defined above, and R.sup.4 is a protecting group with a strong base alkyllithium reagent at -78.degree. C. for 30 minutes, followed by reaction with a compound having the formula ##STR44## wherein Q is a protecting group selected from the group consisting of an ether moiety, an alkoxyalkyl ether moiety, an alkylthioalkyl ether moiety, tetrahydropyranyl, arylalkyl, a trialkylsilyl ether moiety, a cyclic acetal moiety and a cyclic ketal moiety, followed by treatment with a weak base in a solvent selected from methanol, ethanol or acetonitrile, and isolating the product compound having the formula ##STR45## wherein Q, X, Y, R.sup.2, R.sup.3 and R.sup.4 are as above;
- (b) removing the R.sup.4 grouping from the compound of step (a) by treatment with a reagent selected from HCl when R.sup.4 is THP, and MOM or hydrogenolysis with Pd/C when R.sup.4 is benzyl, followed by reducing the nitro group with zinc dust and a strong acid, protecting the newly formed amine by reaction with di-t-butyl-dicarbonate and isolating the product compound having the formula ##STR46## wherein Q, X, Y, R.sup.2 and R.sup.3 are as above;
- (c) treating the compound of step (b) with methanesulfonyl chloride in TEA to convert the hydroxyl group to a methanesulfonyl group, reacting the methanesulfonyl group with LiCl in DMF to replace the methanesulfonyl group with a chlorine atom, then deprotecting the protected-amino group of this compound by treatment with HCl, and cyclizing the deprotected compound by treatment with K.sub.2 CO.sub.3 in t-butanol at reflux to give the compound ##STR47## (d) deprotecting the compound of step (c) by treatment with BBr.sub.3 in a chlorinated solvent at -78.degree. C. to room temperature and isolating the product compound wherein R.sup.1 is hydrogen and X, Y, R.sup.2 and R.sup.3 are as above.
Dependencies are inferred from the claim text.