N-Protected α-amino acids can be easily converted directly into chiral α-amino aldehydes in a one-pot procedure by activation with CDI followed by reduction with DIBAL-H.
Synthesis and preliminary biological evaluations of (+)-isocampholenic acid-derived amides
作者:Uroš Grošelj、Amalija Golobič、Damijan Knez、Martina Hrast、Stanislav Gobec、Sebastijan Ričko、Jurij Svete
DOI:10.1007/s11030-016-9668-9
日期:2016.8
The synthesis of two novel (+)-isocampholenic acid-derived amines has been realized starting from commercially available (1S)-(+)-10-camphorsulfonic acid. The novel amines as well as (+)-isocampholenic acid have been used as building blocks in the construction of a library of amides using various aliphatic, aromatic, and amino acid-derived coupling partners using BPC and CDI as activating agents. Amide
Zr-Catalyzed Synthesis of Tetrasubstituted 1,3-Diacylpyrroles from <i>N</i>-Acyl α-Aminoaldehydes and 1,3-Dicarbonyls
作者:Caria Evans、William J. Berkey、Christopher W. Jones、Stefan France
DOI:10.1021/acs.joc.3c00675
日期:2023.7.7
3-diacylpyrroles is reported that employs the direct use of N-acyl α-aminoaldehydes with 1,3-dicarbonyl compounds. The products were formed in up to 88% yield and shown to be hydrolytically and configurationally stable under the reaction conditions (THF/1,4-dioxane and H2O). The N-acyl α-aminoaldehydes were readily prepared from the corresponding α-amino acids. The reaction tolerates a wide array of substrate
Conversion of α-Amino Acids into Bioactive <i>o</i>-Aminoalkyl Resorcylates and Related Dihydroxyisoindolinones
作者:Bhavesh H. Patel、Andrew M. Mason、Hetal Patel、R. Charles Coombes、Simak Ali、Anthony G. M. Barrett
DOI:10.1021/jo2009356
日期:2011.8.5
The synthesis of biologically active o-aminoalkyl resorcylates and related dihydroxyisoindolinones from functionalized alpha-amino acids without the use of phenolic protection is described. The key aminoalkyl-diketo-dioxinone intermediates were prepared utilizing a crossed Claisen condensation reaction in the presence of diethylzinc. The aromatic unit was constructed via late stage cyclization and aromatization, and subsequent modification provided the novel resorcylates which showed activity against a selection of receptors and kinases, including 5-HT and CDK.
Thioglycine and l-thiovaline: Biologically active H2S-donors
Thioglycine and L-thiovaline are stable under acidic and basic conditions but in the presence of bicarbonate they liberate the gasotransmitter H2S. In cells both thioamino acids were proven to enhance cGMP formation and promote vasorelaxation in mouse aortic rings. Given that H2S is known to lower arterial hypertension, reduce oxidative stress and exhibit cardioprotective effects in preclinical models, H2S donors hold promise as novel treatments for cardiovascular diseases. (C) 2012 Elsevier Ltd. All rights reserved.