Five Roads That Converge at the Cyclic Peroxy-Criegee Intermediates: BF<sub>3</sub>-Catalyzed Synthesis of β-Hydroperoxy-β-peroxylactones
作者:Vera A. Vil’、Gabriel dos Passos Gomes、Maria V. Ekimova、Konstantin A. Lyssenko、Mikhail A. Syroeshkin、Gennady I. Nikishin、Igor V. Alabugin、Alexander O. Terent’ev
DOI:10.1021/acs.joc.8b02218
日期:2018.11.2
actones from silyl enol ethers, enolacetates, and cyclic acetals confirm that the β-peroxylactones indeed correspond to a deep energy minimum that connects a variety of the interconverting oxygen-rich species at this combined potential energy surface. The target β-hydroperoxy-β-peroxylactones were synthesized from β-ketoesters, and their silyl enol ethers, alkyl enol ethers, enolacetates, and cyclic
Inhibition of dipeptidylpeptidaseIV (DPP-4) is an exciting new approach for the treatment of diabetes. To date there has been no DPP-4 chemotype possessing a carboxy group that has progressed into clinical trials. Originating from the discovery of the structurally novel quinoline derivative 1, we designed novel pyridine derivatives containing a carboxy group. In our design, the carboxy group interacted
A small parallel library of 1,4,5-trisubstitutedpyrazoles was prepared in solution using a three-step procedure starting from Meldrum acid. The Meldrum acid was acylated with different acyl chlorides and the products opened with different alcohols and amines to give substituted β-keto esters and β-keto amines. Further reaction with N,N-dimethylformamide dimethylacetal and the final cyclisation were
A convenient synthesis of unsymmetrical, substituted γ-pyrones from Meldrum's acid
作者:Frank J. Zawacki、Michael T. Crimmins
DOI:10.1016/0040-4039(96)01470-0
日期:1996.9
A unique approach to the synthesis of mono and disubstituted γ-pyrones from acylated Meldrum's acid and vinyl ethers has been developed. The convenient one pot synthesis of these versatile polyketide equivalents is accomplished without strong base or low temperatures.