Rapid Total Syntheses Utilizing “Supersilyl” Chemistry
作者:Brian J. Albert、Yousuke Yamaoka、Hisashi Yamamoto
DOI:10.1002/anie.201007210
日期:2011.3.7
In short order: The shortest total syntheses of natural product EBC‐23 (see scheme, PMB=para‐methoxybenzyl, TMS=trimethylsilyl) and a polymethoxy‐1‐alkene to date have been accomplished in just ten total steps each from commercially available chemicals. The syntheses took advantage of highly diastereoselective supersilyl‐directed cascade polyaldol reactions.
Isotactic polymethoxy 1-alkenes from blue-green algae. Synthesis and absolute stereochemistry
作者:Yuji Mori、Yasunori Kohchi、Makoto Suzuki、Shmuel Carmeli、Richard E. Moore、Gregory M. L. Patterson
DOI:10.1021/jo00002a027
日期:1991.1
Novel isotactic polymethoxy-1-alkenes 1-4 were isolated from tolytoxin-producing blue-green algae belonging to the family Scytonemataceae. Scytonema mirabile produced 1 and 2, whereas 3 and 4 were isolated from S. burmanicum. The gross structures and relative stereochemistries were determined by mass and NMR spectral analyses. The absolute configurations of 1-4 were established by direct comparison with optically active synthetic samples.
Application of Stereoselective Ether Transfer to the Synthesis of Isotactic Polyethers
作者:Kai Liu、Joseph W. Arico、Richard E. Taylor
DOI:10.1021/jo100094d
日期:2010.6.18
the synthesis of a series of naturally occurring isotactic polymethoxy compounds. Ethertransfer followed by a hydride workup enables simultaneous, diastereoselective production of two methoxy centers in a single step. High yields and diastereoselectivity are observed even in stereochemically rich, polyoxygenated systems. Direct generation of bis-methyl ether moieties from methoxymethyl ethers minimizes