Design, Synthesis, and Biological Activity of Novel Polycyclic Aza-Amide FKBP12 Ligands
摘要:
Since the discovery that FK-506 promotes neurite outgrowth, considerable attention has been focused on the development of potent nonimmunosuppressive ligands for FK-506 binding proteins (FKBPs). Such neuroimmunophilin agents have been reported to show neuroregenerative activity in a variety of cell and animal models including neurite outgrowth, age-related cognitive decline, Parkinson's disease, peripheral nerve injury, optic nerve degeneration, and diabetic neuropathy. We have designed and synthesized a unique series of tetracyclic aza-amides that have been shown to be potent FKBP12 rotamase inhibitors. The structure-activity relationships established in this study have demonstrated diverse structural modifications that result in potent rotamase inhibitory activity.
Tetracyclic spiro-hydantoin aldose reductase inhibitors and compositions
申请人:Pfizer Inc.
公开号:US04656169A1
公开(公告)日:1987-04-07
Novel biologically-active tetracyclic spiro-hydantoin derivatives which are potent inhibitors of aldose reductase and useful in treating diabetic complications are disclosed. Pharmaceutical compositions containing the novel compounds and a method of treating chronic diabetic complications are also disclosed. A preferred compound is 9'-chloro-5',6'-dihydro-2'-phenyl-spiro[imidazolidine-5,7'-7'H-pyrido(1,2, 3-de)quinoxaline]2,3',4-trione.
Copper(II) efficiently catalyzes the aerobic oxidation of aryl thioacetamides into the corresponding α-keto aryl thioamides in moderate to high yields in the presence of K2CO3 under O2 atmosphere. This protocol is simple, clean, and generates water as the only byproduct. A mechanism is proposed for the reaction course.