Total Synthesis of Serofendic Acids A and B Employing Tin-Free Homoallyl−Homoallyl Radical Rearrangement
作者:Masahiro Toyota、Takeshi Asano、Masataka Ihara
DOI:10.1021/ol051411t
日期:2005.9.1
Total syntheses of serofendic acids A (1a) and B (1b) are described. The key strategic element of the approach involves the novel tin-free homoallyl-homoallyl radical rearrangement of 5 for the construction of bicyclo[2.2.2]octane ring system 4. In addition, the conversion of methyl atisirenoate 2 to serofendic acids A (1a) and B (1b) was achieved on the basis of the Michael reaction of sodium thiomethoxide
We present efficient syntheses of serofendic acids A and B (SA-A and SA-B), novel neuroprotective substances isolated from fetal calf serum. Biological and pharmacological evaluation showed that SA-A and SA-B have potent protective action aaainst glutarnate-induced neurotoxicity, but do not interact directly with glutamate receptors. A pharmacokinetic study showed that they have good oral bioavailability in rats. The results indicate that SA-A and SA-B are potential lead compounds for candidate drugs to treat various neuroloaical disorders. (C) 2007 Elsevier Ltd. All rights reserved.