Development of Tyrphostin Analogues to Study Inhibition of the
<i>Mycobacterium tuberculosis</i>
Pup Proteasome System**
作者:Guido V. Janssen、Susan Zhang、Remco Merkx、Christa Schiesswohl、Champak Chatterjee、K. Heran Darwin、Paul P. Geurink、Gerbrand J. Heden van Noort、Huib Ovaa
DOI:10.1002/cbic.202100333
日期:2021.11.3
The Mycobacteriumtuberculosis (Mtb) prokaryotic ubiquitin-like (pup) proteasomesystem is an attractive target for new drug development. In this study a screen was performed identifying Tyrphostins as low micromolar inhibitors of the Mtb protease Dop. To gain insight in the important functional aspects of these inhibitors, 25 new analogues were prepared and validated, in vitro. Several new compounds
Dienamine-Mediated Asymmetric Inverse-Electron-Demand Hetero-Diels-Alder Reaction of Linear Deconjugated Enones: Diversity-Oriented Synthesis of 3,4-Dihydropyrans
作者:Rajendra Maity、Subhas Chandra Pan
DOI:10.1002/ejoc.201601575
日期:2017.1.26
The dienamine‐mediated inverse‐electron‐demandhetero‐Diels–Alderreaction of deconjugated enones having α‐CH groups and electron‐deficient oxadienes with a cyano group allows the efficient and enantioselectivesynthesis of 2,4‐stereogenic 3,4‐dihydropyrans. With a primary amine and benzoic acid, high yields and excellent enantioselectivities are obtained for a range of 3,4‐dihydropyrans.
β-Cyanoethylhydrazine 1 reacts with benzoylacetonitrile 2 in refluxing ethanol to yield 5-amino-1-β-cyanoethyl-3-phenylpyrazole 4; in acetic acid acetyl-β-cyanoethylhydrazone 8 was obtained. Compounds 4 and 8 were readily cyclized into 2-phenyl-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrimidin-5-one 5 by acetic acid-hydrochloric acid. 3-p-Chlorophenylazo-2-phenyl-4,5,6,4-tetrahydropyrazolo[1,5-a]pyrimidin-5-one