Rhodium-Catalyzed Regioselective Domino Azlactone-Alkyne Coupling/Aza-Cope Rearrangement: Facile Access to 2-Allyl-3-oxazolin-5-ones and Trisubstituted Pyridines
作者:Jinqiang Kuang、Shaista Parveen、Bernhard Breit
DOI:10.1002/anie.201704022
日期:2017.7.10
Rhodium‐catalyzedregioselective addition of azlactones to internal alkynes combined with aza‐Cope rearrangement provides efficient atom economic access to 2‐allyl‐3‐oxazolin‐5‐one derivatives. Extension to a triple domino process, in which the above process is combined with in situ azlactone formation starting from amino acids renders this process even more attractive. Subsequent thermolysis of the
Enantioselective iridium catalyzed α-alkylation of azlactones by a tandem asymmetric allylic alkylation/aza-Cope rearrangement
作者:Xue-Dan Bai、Qing-Feng Zhang、Ying He
DOI:10.1039/c9cc01450k
日期:——
The development of an iridium catalyzedenantioselective α-alkylation of azlactones has been described. The reaction provides rapid access to a wide range of enantio-enriched quaternary carbon center allylated 2,4-diaryloxazol-5(2H)-ones in excellent yields with high enantioselectivities. The transformation was achieved through a tandem allylicalkylation/aza-Cope rearrangement, affording the desired
Regioselective Synthesis of 3-Trifluoromethylpyrroles by [3 + 2] Cycloaddition of <i>N</i>-Acyl α-Amino Acids and 2-Bromo-3,3,3-trifluoropropene
作者:Weidi Zeng、Hui Li、Duozhi Wang、Lei Zhou
DOI:10.1021/acs.joc.3c01611
日期:2023.10.6
A mild and concise method for the synthesis of 3-trifluoromethylpyrroles via base-mediated [3 + 2] cycloaddition of N-acyl α-amino acids and 2-bromo-3,3,3-trifluoropropene is described. N-Acyl α-amino acids serve as 1,3-dipole precursors without additional activating agents directly. A high level of regioselectivity was observed, regardless of the electronic nature and size of the substituents on 1
Inhibition of the Human Proteasome by Imidazoline Scaffolds
作者:Lauren M. Azevedo、Theresa A. Lansdell、Jacob R. Ludwig、Robert A. Mosey、Daljinder K. Woloch、Dillon P. Cogan、Gregory P. Patten、Michael R. Kuszpit、Jason S. Fisk、Jetze J. Tepe
DOI:10.1021/jm400235r
日期:2013.7.25
The proteasome has emerged as the primary target for the treatment of multiple myeloma. Unfortunately, nearly all patients develop resistance to competitive-type proteasome inhibitors such as bortezomib. Herein, we describe the optimization of noncompetitive proteasome inhibitors to yield derivatives that exhibit nanomolar potency (compound 49, IC50 130 nM) toward proteasome inhibition and overcome bortezomib resistance. These studies illustrate the feasibility of the development of noncompetitive proteasome inhibitors as additives and/or alternatives to competitive proteasome inhibitors.
Terada, Masahiro; Tanaka, Hiroyasu; Sorimachi, Keiichi, Journal of the American Chemical Society, 2009, vol. 131, p. 3430 - 3431