Evaluation of synthetic naphthalene derivatives as novel chemical chaperones that mimic 4-phenylbutyric acid
摘要:
The chemical chaperone 4-phenylbutyric acid (4-PBA) has potential as an agent for the treatment of neurodegenerative diseases. However, the requirement of high concentrations warrants chemical optimization for clinical use. In this study, novel naphthalene derivatives with a greater chemical chaperone activity than 4-PBA were synthesized with analogy to the benzene ring. All novel compounds showed chemical chaperone activity, and 2 and 5 possessed high activity. In subsequent experiments, the protective effects of the compounds were examined in Parkinson's disease model cells, and low toxicity of 9 and 11 was related to amphiphilic substitution with naphthalene. (C) 2015 Elsevier Ltd. All rights reserved.
4-Methoxy-1H-phenalen-1-one (4-methoxyperinaphthenone, 1), a subunit found in some Musa phytoalexins; and related natural products from the Haemodoraceae, was synthesized starting from 2-methoxynaphthalene in five steps and an overall yield of 36%. A Heck-Fujiwara coupling between ethyl acrylate and 1-bromonaphthalene afforded the corresponding (E)-naphthylpropanoic acid which, after hydrogenolysis, was subjected to a one-pot Friedel-Crafts acylation-DDQ dehydrogenation procedure to furnish 1. (c) 2008 Elsevier Ltd. All rights reserved.