Synthesis of (−)-6,7-Dideoxysqualestatin H5 by Carbonyl Ylide Cycloaddition–Rearrangement and Cross-electrophile Coupling
作者:Younes Fegheh-Hassanpour、Tanzeel Arif、Herman O. Sintim、Hamad H. Al Mamari、David M. Hodgson
DOI:10.1021/acs.orglett.7b01513
日期:2017.7.7
An asymmetricsynthesis of (−)-6,7-dideoxysqualestatin H5 is reported. Key features of the synthesis include the following: (1) highly diastereoselective n-alkylation of a tartrate acetonide enolate and subsequent oxidation–hydrolysis to provide an asymmetric entry to a β-hydroxy-α-ketoester motif; (2) facilitation of Rh(II)-catalyzed cyclic carbonyl ylide formation–cycloaddition by co-generation of
The present disclosure relates to compounds that are sodium channel inhibitors and to their use in the treatment of various disease states, including cardiovascular diseases and diabetes.
Stereoselective total synthesis of (+)-artemisinin, the antimalarial constituent of Artemisia annua L
作者:Mitchell A. Avery、Wesley K. M. Chong、Clive Jennings-White
DOI:10.1021/ja00029a028
日期:1992.1
A 10-step stereoselective total synthesis of the antimalarial cadinane sesquiterpene (+)-artemisinin (1) is described. Elaboration of (R)-(+)-pulegone to the known sulfoxide 11 was followed by dianion alkylation and desulfurization to provide the trans-2,3-substituted cyclohexanone 7. Homologation to the cyclohexenecarboxaldehyde 6 was followed by a diastereoselective silyl anion addition to afford the silyl acetate 15. Tandem Claisen ester-enolate rearrangement and dianion alkylation furnished the fully functionalized vinylsilane 18 that underwent abnormal ozonolysis and cyclization to provide the natural product 1.
[EN] PERFUME SYSTEMS<br/>[FR] SYSTÈMES DE PARFUM
申请人:PROCTER & GAMBLE
公开号:WO2013109798A2
公开(公告)日:2013-07-25
The present application relates to perfume delivery systems and consumer products comprising perfume delivery systems and or perfume raw materials, as well as processes for making and using such perfume delivery systems and consumer products.