Total Synthesis and Structure Revision of Halioxepine
作者:Caroline Poock、Markus Kalesse
DOI:10.1002/chem.202004847
日期:2021.1.21
total synthesis of halioxepine is accomplished using a 1,4‐addition for constructing the quaternary center at C10 and a halo etherification for the generation of the tertiary ether at C7. The correct structure of halioxepine was determined by assembling different enantiomeric building blocks and by changing the relative configuration between C10 and C15.
Stereoselective Multicomponent Reactions Using Zincate Nucleophiles: β-Dicarbonyl Synthesis and Functionalization
作者:Stephen K. Murphy、Mingshuo Zeng、Seth B. Herzon
DOI:10.1021/acs.orglett.6b02320
日期:2016.10.7
A general strategy for conjugate addition-C-acylation that enables the synthesis of enantioenriched β-dicarbonyl compounds is described. A novel method for derivatizing these adducts by stereo- and site-selective zinc-catalyzed addition of alkyllithium reagents is also reported. These reactions can be performed in tandem to achieve an enantio- and diastereoselective four-component coupling. The in
[EN] NEW PLEUROMUTILIN ANTIBIOTIC COMPOUNDS, COMPOSITIONS AND METHODS OF USE AND SYNTHESIS<br/>[FR] NOUVEAUX COMPOSÉS ANTIBIOTIQUES DE PLEUROMUTILINE, COMPOSITIONS ET PROCÉDÉS D'UTILISATION ET DE SYNTHÈSE
申请人:UNIV YALE
公开号:WO2018144717A8
公开(公告)日:2019-02-21
Enantiomerically Pure 6-Substituted 2-Oxo-cyclohexanecarboxylates by Conjugate Addition of Cuprates to Asymmetric Shielded 2-Oxo-cyclohexenecarboxylates
作者:Ernst Urban、Gerhard Richs、Guido Knühl
DOI:10.1016/0040-4020(95)00676-y
日期:1995.10
Asymmetric shielded 2-oxo-cyclohexenecarboxylates 6n and 6x were prepared by transesterification of 2-oxo-cyclohexanecarboxylate 2 with camphor derived concave alcohols In and Ix and by subsequent introduction of a double bond via phenylselenides. Diastereoselective conjugate addition of equimolar amounts of mixed cuprates at -78 degrees C and deprotection by methanolysis gave enantiomerically pure 6-substituted 2-oxo-cyclohexanecarboxylates 14-19 and ent-14-19, valuable as chiral building blocks in natural product synthesis.
Lanthanide Triflate-Promoted Palladium-Catalyzed Cyclization of Alkenyl β-Keto Esters and Amides
作者:Dan Yang、Jin-Heng Li、Qiang Gao、Yi-Long Yan
DOI:10.1021/ol0349110
日期:2003.8.1
graphicsLanthanide triflates were found to promote the palladium-catalyzed cyclization of alkenyl beta-keto esters and amides. In the presence of catalytic amounts of PdCl2(MeCN)(2) and Ln(OTf)(3), various alkenyl beta-keto esters and amides underwent regioselective cyclization reactions to give six-, seven-, or eight-membered-ring carbocycles in moderate to excellent yields.