Simple and versatile synthesis of branched polyols: (+)-2-C-methylerythritol and (+)-2-C-methylthreitol
摘要:
The paper reports a new approach for the enantioselective synthesis of 2-C-methyl tetrols. The procedure has been utilized for preparing methylthreitol and methylerythritol, a putative intermediate in the mevalonate-independent biosynthesis of terpenoids in bacteria, algae and higher plants. The methodology offers straightforward access to related compounds and isotopically labeled derivatives. (C) 2000 Elsevier Science Ltd. All rights reserved.
The construction of a chiral building block with a quaternary carbon center is described, based on the Lewis acid-catalyzedacylmigration of α,β-epoxy ketone with alkyl and alkenyl substituents.
Studies Directed toward the Total Synthesis of Lancifodilactone G: An Expeditious Route to the ABC Subunit
作者:Leo A. Paquette、Kwong Wah Lai
DOI:10.1021/ol800418m
日期:2008.6.5
An efficient entry to the ABC network of lancifodilactone G is outlined. The C ring is constructed by way of enyne ring-closing metathesis. The AB component is established via a base-mediated biomimetic oxy-Michael addition--lactonization sequence.