An improved synthesis of (−)-brevisamide, a marine monocyclic ether amide of dinoflagellate origin
作者:Ryosuke Tsutsumi、Takefumi Kuranaga、Jeffrey L.C. Wright、Daniel G. Baden、Emiko Ito、Masayuki Satake、Kazuo Tachibana
DOI:10.1016/j.tet.2010.06.074
日期:2010.8
An improved synthesis of (−)-brevisamide a marine cyclic ether isolated from the red-tide dinoflagellate Karenia brevis was achieved. The ether ring portion was constructed from an unsaturated lactone, which was prepared enantioselectively via an Evans aldol reaction and one-pot lactonization in the presence of excessive base after an Ando reaction. The ether ring and a dienol side chain fragment were
Synthesis of a proposed biosynthetic intermediate of a marine cyclic ether brevisamide for study on biosynthesis of marine ladder-frame polyethers
作者:Tomohiro Shirai、Takefumi Kuranaga、Jeffrey L.C. Wright、Daniel G. Baden、Masayuki Satake、Kazuo Tachibana
DOI:10.1016/j.tetlet.2010.01.013
日期:2010.3
brevisamide (1) was isolated from the dinoflagellate Karenia brevis that produces a variety of ladder-frame polyethers. Its proposed biosynthetic intermediate (2) comprising a linear backbone with an E-olefin functionality was synthesized for biosyntheticstudies on the marine ladder-frame polyethers.