Mild Construction of 3-Methyl Tetramic Acids Enabling a Formal Synthesis of Palau’imide
作者:Wen-Ju Bai、Stephen K. Jackson、Thomas R. R. Pettus
DOI:10.1021/ol301556a
日期:2012.8.3
A general method to construct 3-methyl-4-O-methylated tetramic acids displaying a C-5 stereocenter is presented. The synthetic sequence employs a Sml(2)-mediated cyclization, whereby the chirality of the emerging tetramic acid core is retained from the starting chiral amino acid. Application to palau'imide is discussed.
The first enantioselective synthesis of cytotoxic marine natural product palau’imide and assignment of its C-20 stereochemistry
作者:Hong-Qiao Lan、Yuan-Ping Ruan、Pei-Qiang Huang
DOI:10.1039/c0cc00452a
日期:——
racemization-free synthesis of methyl 5-benzyl-3-methyltetramate via alkylation, and used in the first asymmetric synthesis of palau'imide (1). This allowed the establishment of the hitherto unknown stereochemistry at the C-20 of palau'imide as S.