Copper-Catalysed (Diacetoxyiodo)benzene-Promoted Aerobic Esterification Reaction: Synthesis of Oxamates from Acetoacetamides
作者:Zhiguo Zhang、Xiaolong Gao、Haifeng Yu、Guisheng Zhang、Jianming Liu
DOI:10.1002/adsc.201800616
日期:2018.9.3
A copper‐catalysed (diacetoxyiodo)benzene‐promoted aerobic esterification reaction of acetoacetamides was developed for the synthesis of oxamates, which are useful precursors in synthetic organic chemistry. This practical and mild synthetic approach proceeded at 25 °C under open‐air conditions and afforded methyl 2‐oxo‐2‐(phenylamino)acetates in good to excellent yields combined with C−C σ‐bond cleavage
Total Synthesis of Epothilone D: The Nerol/Macroaldolization Approach
作者:Ludger A. Wessjohann、Günther O. Scheid、Uwe Eichelberger、Sumaira Umbreen
DOI:10.1021/jo401355r
日期:2013.11.1
A highly convergent and stereocontrolled synthesis of epothilone D (4) is reported. Key features are a cheap and Z-selective synthesis of the northern half based on nerol and acetoacetate and chromium(II)-mediated Reformatsky reactions as a powerful tool for chemoselective asymmetric carbon–carbon bond formations, including an unusual stereospecific macroaldolization.
Electrochemically Induced Intermolecular Cross-Dehydrogenative C–O Coupling of β-Diketones and β-Ketoesters with Carboxylic Acids
作者:Oleg V. Bityukov、Olesya K. Matveeva、Vera A. Vil’、Vladimir A. Kokorekin、Gennady I. Nikishin、Alexander O. Terent’ev
DOI:10.1021/acs.joc.8b02791
日期:2019.2.1
The electrochemicallyinduced cross-dehydrogenative C–O coupling of β-diketones and β-ketoesters (C–H reagents) with carboxylic acids (O–H reagents) was developed. An important feature of this reaction lies in the selective formation of intermolecular C–O coupling products in high yields, up to 92%, using DMSO as a solvent with a broad substrate scope in an undivided cell equipped with carbon and platinum
Synthesis of (−)‐Hebelophyllene E: An Entry to Geminal Dimethyl‐Cyclobutanes by [2+2] Cycloaddition of Alkenes and Allenoates
作者:Johannes M. Wahl、Michael L. Conner、M. Kevin Brown
DOI:10.1002/anie.201801110
日期:2018.4.16
The first synthesis of hebelophyllene E is presented, along with assignment of its previously unknown relative configuration through synthesis of epi‐ent‐hebelophyllene E. Development of a catalytic enantioselective [2+2] cycloaddition of alkenes and allenoates provides access to the required chiral geminal dimethylcyclobutanes. Key to its success is the identification of a novel oxazaborolidine catalyst
[DE] THIAEPOTHILONE ZUR BEHANDLUNG VON KREBSERKRANKUNGEN<br/>[EN] THIAEPOTHILONE FOR TREATING CANCEROUS DISEASES<br/>[FR] THIAEPOTHILONE POUR TRAITER DES MALADIES CANCEREUSES
申请人:LEIBNIZ INST FUER PFLANZENBIOC
公开号:WO2005051947A1
公开(公告)日:2005-06-09
Die vorliegende Erfindung betrifft neue Makrocyclen der allgemeinen Formel (I) sowie deren Verwendung zur Behandlung von Krebserkrankungen.