Peptide‐Catalyzed Fragment Couplings that Form Axially Chiral Non‐
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‐Symmetric Biaryls
作者:Gavin Coombs、Marcus H. Sak、Scott J. Miller
DOI:10.1002/anie.201913563
日期:2020.2.10
We have demonstrated that small, modular, tetrameric peptides featuring the Lewis-basic residue β-dimethylaminoalanine (Dmaa) are capable of atroposelectively coupling naphthols and ester-bearing quinones to yield non-C2 -symmetric BINOL-type scaffolds with good yields and enantioselectivity. The study culminates in the asymmetric synthesis of backbone-substituted scaffolds similar to 3,3'-disubstituted
Chemoselective Esterification of Phenolic Acids in the Presence of Sodium Bicarbonate in Ionic Liquids
作者:Ambika、Pradeep Pratap Singh、S. M. S. Chauhan
DOI:10.1080/00397910701845480
日期:2008.2.1
Abstract Chemoselective esterification of phenolicacids with dialkyl sulphates or alkyl halides in the presence of sodium bicarbonate in 1,3‐dialkylimidazolium ionic liquids is reported in excellent yields and less reaction time as compared to organic solvents.
Divergent Synthesis of Natural Benzyl Salicylate and Benzyl Gentisate Glucosides
作者:Dariya D. Fedorova、Dariya S. Nazarova、David L. Avetyan、Andrey Shatskiy、Maxim L. Belyanin、Markus D. Kärkäs、Elena V. Stepanova
DOI:10.1021/acs.jnatprod.0c00838
日期:2020.10.23
Herein is reported the first total synthesis of benzyl salicylate and benzyl gentisate glucosides present in various plant species, in particular the Salix genus, such as Populus balsamifera and P. trichocarpa. The method permits the synthesis of several natural phenolic acid derivatives and their glucosides starting from salicylic or gentisic acid. The divergent approach afforded access to three different
Atroposelective Synthesis of Axially Chiral Biaryldiols via Organocatalytic Arylation of 2-Naphthols
作者:Ye-Hui Chen、Dao-Juan Cheng、Jian Zhang、Yong Wang、Xin-Yuan Liu、Bin Tan
DOI:10.1021/jacs.5b10152
日期:2015.12.9
The first phosphoric acid-catalyzedasymmetric direct arylative reactions of 2-naphthols with quinone derivatives have been developed, providing efficient access to a class of axially chiral biaryldiols in good yields with excellent enantioselectivities under mild reaction conditions. This approach is a highly convergent and functional group tolerant route to the rapid construction of axially chiral compounds