Design, synthesis, and biological evaluation of novel 4-substituted 1-methyl-1,2,3,6-tetrahydropyridine analogs of MPTP
摘要:
The exceptionally good MAO-B substrate properties of several 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) derivatives have prompted studies to evaluate the corresponding properties of tetrahydropyridines bearing heteroatom-linked groups at C-4. The 1-methyl-4-phenoxy-1,2,3,6-tetrahydropyridine analog proved to be an excellent MAO-B substrate. Unlike analogs bearing hydrocarbon substituents at C-4, the resulting dihydropyridinium metabolite did not undergo further oxidation to the pyridinium compound but rather underwent hydrolytic cleavage. This observation has led to studies designed to explore the possibility of developing novel, nontoxic derivatives of MPTP bearing potential pharmacologically active leaving groups at C-4. In this paper we report the results of synthetic and metabolic studies on a series of tetrahydropyridine analogs of MPTP with oxygen, sulfur, and carbamoyloxy derivatives on C-4 which serve as model compounds to evaluate the scope of this prodrug concept.
AZA-DIELS-ALDER REACTIONS OF 2-(PHENYLTHIO)-1,3-BUTADIENE WITH SIMPLE IMINIUM SALTS
作者:Shang-Shing P. Chou、Chia-Cheng Hung
DOI:10.1081/scc-100103543
日期:2001.1
The titled compound 2 was readily prepared by thermal desulfonylation of 3-(phenylthio)-3-sulfolene (1). The aza-Diels-Alder reactions of 2 with some simple iminium salts gave the cyclized products 3–7 in good yield with complete control of regiochemistry.
The exceptionally good MAO-B substrate properties of several 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) derivatives have prompted studies to evaluate the corresponding properties of tetrahydropyridines bearing heteroatom-linked groups at C-4. The 1-methyl-4-phenoxy-1,2,3,6-tetrahydropyridine analog proved to be an excellent MAO-B substrate. Unlike analogs bearing hydrocarbon substituents at C-4, the resulting dihydropyridinium metabolite did not undergo further oxidation to the pyridinium compound but rather underwent hydrolytic cleavage. This observation has led to studies designed to explore the possibility of developing novel, nontoxic derivatives of MPTP bearing potential pharmacologically active leaving groups at C-4. In this paper we report the results of synthetic and metabolic studies on a series of tetrahydropyridine analogs of MPTP with oxygen, sulfur, and carbamoyloxy derivatives on C-4 which serve as model compounds to evaluate the scope of this prodrug concept.
Chemical model studies on the monoamine oxidase-B catalyzed oxidation of 4-substituted 1-methyl-1,2,3,6-tetrahydropyridines
Fe+3 (1,10-phenanthroline)3 as the electron acceptor] and HAT pathway (using the tert-butoxyl radical as the hydrogen atom acceptor). The rates of oxidation and deuteriumisotopeeffects observed with these compounds were similar with the two model reactions. Consequently, unlike their utility in modeling the related cytochrome P450 catalyzed alpha-carbon oxidation of N,N-dimethylaniline derivatives