Syntheses of two anacardicacids [6-pentadecyl- and 6-(10-pentadecenyl) salicylic acid], inhibitors of prostaglandin synthetase and of the growth of certain insects, and ginkgoic acid via directive metallation is reported.
Synthetic studies of thiazoline and thiazolidine-containing natural products — 1. Phosphorus pentachloride-mediated thiazoline construction reaction
作者:Akira Ino、Akira Murabayashi
DOI:10.1016/s0040-4020(99)00582-7
日期:1999.8
Phosphorus pentachloride effectively mediates the cyclization of N-acylcysteamine derivatives giving rise to thiazoline rings. Using this method, sterically hindered thiazoline analogs could be constructed and thus segment A (the left half) of micacocidin, a unique antimycoplasma antibiotic, was synthesized efficiently.
Total synthesis of the antimycoplasma antibiotic micacocidin
作者:Akira Ino、Yasushi Hasegawa、Akira Murabayashi
DOI:10.1016/s0040-4039(98)00518-8
日期:1998.5
A total synthesis of the antimycoplasma antibiotic micacocidin (1) is described. Construction of sterically hindered thiazoline 12 was achieved by a phosphorus pentachloride-mediated cyclization reaction of S-protected aryloylcysteine 11, and compound 1 with desired chirality at C-10 was favorably obtained from diastereomeric mixture 30 through formation of the Zn complex 31. (C) 1998 Elsevier Science Ltd. All rights reserved.
Anacardic acid derivatives as inhibitors of glyceraldehyde-3-phosphate dehydrogenase from Trypanosoma cruzi
作者:Junia M. Pereira、Richele P. Severino、Paulo C. Vieira、João B. Fernandes、M. Fátima G.F. da Silva、Aderson Zottis、Adriano D. Andricopulo、Glaucius Oliva、Arlene G. Corrêa
DOI:10.1016/j.bmc.2008.08.057
日期:2008.10
Chagas' disease, a parasitic infection caused by the flagellate protozoan Trypanosoma cruzi, is a major public health problem affecting millions of individuals in Latin America. On the basis of the essential role in the life cycle of T. cruzi, the glycolytic enzyme glyceraldehyde-3-phosphate dehydrogenase (GAPDH) has been considered an attractive target for the development of novel antitrypanosomatid agents. In the present work, we describe the inhibitory effects of a small library of natural and synthetic anacardic acid derivatives against the target enzyme. The most potent inhibitors, 6-n-pentadecyl-(1) and 6-n-dodecylsalicilic acids (10e), have IC50 values of 28 and 55 mu M, respectively. The inhibition was not reversed or prevented by the addition of Triton X-100, indicating that aggregate-based inhibition did not occur. In addition, detailed mechanistic characterization of the effects of these compounds on the T. cruzi GAPDH-catalyzed reaction showed clear noncompetitive inhibition with respect to both substrate and cofactor. (C) 2008 Elsevier Ltd. All rights reserved.