Total synthesis of motualevic acids A–F, (E) and (Z)-antazirines
摘要:
Total synthesis of motualevic acids A-F and (E) & (Z) geometrical isomers of antazirines has been achieved from a commercially available starting material, 1,10-decanediol. The synthesis of motualevic acid E served as a common key intermediate for the synthesis of most of these natural products. The key steps involved in this synthesis were Wittig olefination, Corey-Fuchs reaction, Neber reaction, amide coupling. (C) 2014 Elsevier Ltd. All rights reserved.
A fluorescence-labeled calix[4]arene library substituted with peptides at the upperrim was synthesized. Screening of the library for binding a dye-labeled oligopeptide indicated that some peptidocalix[4]arenes selectively bind the oligopeptide. The chemosensitivity of the library members for a target peptide was also investigated.
V-MPS4 catalyst was reusable up to six times without a significant loss in the product yield. The advantages of using the heterogeneous catalyst were further demonstrated by conducting the deprotection reaction in a continuous flow process, which resulted in a 2.7-fold higher catalyst turnover number and 60-fold higher turnover frequency compared to those of the corresponding batch reaction. Fullsize
Selective deprotection of (4-methoxyphenyl)-methyl (MPM) ethers using clay supported ammoniumnitrate under microwave irradiation is described. The use of expensive reagents and problems associated with slurry reactions are avoided.
Total synthesis of motualevic acids A–F, (E) and (Z)-antazirines
作者:Vilas D. Kadam、Gangarajula Sudhakar
DOI:10.1016/j.tet.2014.12.092
日期:2015.2
Total synthesis of motualevic acids A-F and (E) & (Z) geometrical isomers of antazirines has been achieved from a commercially available starting material, 1,10-decanediol. The synthesis of motualevic acid E served as a common key intermediate for the synthesis of most of these natural products. The key steps involved in this synthesis were Wittig olefination, Corey-Fuchs reaction, Neber reaction, amide coupling. (C) 2014 Elsevier Ltd. All rights reserved.