Synthesis of (±)-likonide B (smenochromene D) using a regioselective Claisen rearrangement, separation of the enantiomers and stereochemical assignment
作者:Marjorie Bruder、Stephen J. Smith、Alexander J. Blake、Christopher J. Moody
DOI:10.1039/b901358j
日期:——
A synthesis of the unusual ansa-bridged farnesyl hydroquinone derivative likonide B in racemic form is described. The natural product, also known as smenochromene D, was obtained from geranylacetone by a route in which the key steps are a regioselective microwave-mediated Claisen rearrangement of an aryl propargyl ether to deliver the chromene ring, and macrocyclization via an intramolecular Mitsunobu
Improved oxidation procedure with aromatic peroxyacids
作者:F. Camps、J. Coll、A. Messeguer、M.A. Pericàs
DOI:10.1016/s0040-4039(01)91338-3
日期:1981.1
The application of the -Chloroperbenzoic acid-potassium fluoride system in the Baeyer-Villiger oxidation of aromatic aldehydes and in the epoxidation of olefins has been studied.
Concise Synthesis of (±)-Smenochromene D (= Likonide B)<sub />
作者:Dirk Trauner、Brooke S. Olson
DOI:10.1055/s-2005-863713
日期:——
The total synthesis of smenochromene D, an unusual ansa-terpenoid is described. The synthesis features an unprecedented macrocyclization proceeding through a biomimetic electrocyclization. The enantiomeric relationship between smenochromene D and likonide B is established.
描述了一种不寻常的 Ansa-萜类化合物 smenochromene D 的全合成。该合成具有通过仿生电环化进行的前所未有的大环化。建立了 smenochromene D 和 likonide B 之间的对映异构关系。
Synthesis of Methoxyfumimycin with 1,2-Addition to Ketimines
作者:Patrick J. Gross、Caroline E. Hartmann、Martin Nieger、Stefan Bräse
DOI:10.1021/jo902026s
日期:2010.1.1
The synthesis of (±)-methoxyfumimycin, a potential new bacterial peptide deformylase (PDF) inhibitor, is reported. To generate the stereogenic fully substituted carbon, the key step is a 1,2-addition of a methyl Grignard reagent to a ketimine. The overall synthetic strategy involves a Dakin oxidation of a vanillin derivative, Friedel−Crafts acylation, Claisen rearrangement, lactonization, and rhodium-catalyzed
Total synthesis of smenochromene B through ring contraction
作者:Carla P. Rosa、Michael A. Kienzler、Brooke S. Olson、Guangxin Liang、Dirk Trauner
DOI:10.1016/j.tet.2007.03.069
日期:2007.7
A total synthesis of racemic smenochromene B has been achieved. The synthesis proceeds through an unusual rearrangement of smenochromene D with concomitant ring contraction and double bond isomerization. (c) 2007 Elsevier Ltd. All rights reserved.