Evaluation of Catalyst Acidity and Substrate Electronic Effects in a Hydrogen Bond-Catalyzed Enantioselective Reaction
作者:Katrina H. Jensen、Matthew S. Sigman
DOI:10.1021/jo1013806
日期:2010.11.5
A modular catalyst structure was applied to evaluate the effects of catalystacidity in a hydrogen bond-catalyzed hetero Diels−Alder reaction. Linear free energy relationships between catalystacidity and both rate and enantioselectivity were observed, where greater catalystacidity leads to increased activity and enantioselectivity. A relationship between reactant electronic nature and rate was also
A Diels–Alder-Based Total Synthesis of (−)-Kainic Acid
作者:Arturo Orellana、Sushil K. Pandey、Sébastien Carret、Andrew E. Greene、Jean-François Poisson
DOI:10.1021/jo300608g
日期:2012.6.15
An efficient synthesis of (−)-kainicacid, through a high-pressure-promoted Diels–Alder cycloaddition of a vinylogous malonate derived from 4-hydroxyproline, is described. The bicyclic adduct could be converted into the natural product with complete stereocontrol.
Diels–Alder reactions of nitrobenzofurans: a simple dibenzofuran Synthesis. Theoretical studies using DFT methods
作者:Claudia D. Della Rosa、Juan P. Sanchez、María N. Kneeteman、Pedro M.E. Mancini
DOI:10.1016/j.tetlet.2011.02.074
日期:2011.5
Diels–Alder reactions with normal electron demand using several structurally different dienes. A very strong electron-acceptor group, such as the nitro group, pushes the dienophilic character of these heterocycliccompounds. Since this substituent is easily extruded under thermal conditions, this reaction sequence becomes a simple method for the preparation of families of organic compounds with heteroatom
Synthesis of Trisaccharides by Hetero-Diels-Alder Welding of Two Monosaccharide Units
作者:Jatta A. Himanen、Petri M. Pihko
DOI:10.1002/ejoc.201200277
日期:2012.7
selectivities in the HDA reaction were obtained by using chiral Schiff base chromium complexes. Disaccharide products were accessible by reaction of Danishefsky's diene with acetyl- and benzyl-protected galactoside aldehydes. For the synthesis of trisaccharide products, acetyl-protected glucose or galactose-derived dienes were fused with monosaccharide-derived aldehydes using chromium catalysts for the
Described herein are compounds of formula (I) (Formula (I)). The compounds of formula (I) act as DGAT1 inhibitors and can be useful in preventing, treating or acting as a remedial agent for hyperlipidemia, diabetes mellitus and obesity.