50897-30-8Relevant articles and documents
Required Immunoproteasome Subunit Inhibition Profile for Anti-Inflammatory Efficacy and Clinical Candidate KZR-616 ((2 S,3 R)- N-((S)-3-(Cyclopent-1-en-1-yl)-1-((R)-2-methyloxiran-2-yl)-1-oxopropan-2-yl)-3-hydroxy-3-(4-methoxyphenyl)-2-((S)-2-(2-morpholinoacetamido)propanamido)propenamide)
Johnson, Henry W.B.,Lowe, Eric,Anderl, Janet L.,Fan, Andrea,Muchamuel, Tony,Bowers, Simeon,Moebius, David C.,Kirk, Christopher,McMinn, Dustin L.
, p. 11127 - 11143 (2019/01/04)
Selective immunoproteasome inhibition is a promising approach for treating autoimmune disorders, but optimal proteolytic active site subunit inhibition profiles remain unknown. We reveal here our design of peptide epoxyketone-based selective low molecular mass polypeptide-7 (LMP7) and multicatalytic endopeptidase complex subunit-1 (MECL-1) subunit inhibitors. Utilizing these and our previously disclosed low molecular mass polypeptide-2 (LMP2) inhibitor, we demonstrate a requirement of dual LMP7/LMP2 or LMP7/MECL-1 subunit inhibition profiles for potent cytokine expression inhibition and in vivo efficacy in an inflammatory disease model. These and additional findings toward optimized solubility led the design and selection of KZR-616 disclosed here and presently in clinical trials for treatment of rheumatic disease.
Stereoselective Synthesis of Threo and Erythro β-Hydroxy and β-Disubstituted-β-Hydroxy α-Amino Acids
Blaskovich, Mark A.,Evindar, Ghotas,Rose, Nicholas G. W.,Wilkinson, Scott,Luo, Yue,Lajoie, Gilles A.
, p. 3631 - 3646 (2007/10/03)
Optically pure N-protected serine aldehyde equivalents can be prepared by the protection of the carboxylic group of serine by a cyclic ortho ester. Alkylation of N-Cbz-, N-Fmoc- or N-Boc-protected serine with oxetane tosylate 1 or bromide 2 gives the corresponding oxetane esters 4a-c which can easily be converted to the cyclic ortho esters 5a-c. A variety of unusual threo β5-hydroxy amino acids have been synthesized by Grignard addition to these optically pure serine aldehyde equivalents. The erythro diastereomers can be obtained by oxidation of the initial threo adduct followed by reduction with LiBH4. Also described is a general approach for the diastereoselective synthesis of optically pure β,β-dialkyl-β-hydroxy α-amino acids. These highly substituted amino acids are prepared by a sequence of Grignard addition to the optically active serine aldehyde equivalent, followed by oxidation of the initial adduct, and a second Grignard addition to the resulting ketone. The hydroxy adduct is obtained with very high diastereoselectivity (84-96% de). All four diastereomers can be selectively synthesized by varying the order of the Grignard additions and the chirality of the initial synthon. Removal of the protecting groups can be effected in very mild conditions, giving excellent yields of highly substituted amino acids in high diastereomeric purity.
A NEW ENTRY TO THE SYNTHESIS OF β-HYDROXYTYROSINES VIA A NOVEL BENZYLIC HYDROXYLATION
Shimamoto, Keiko,Ohfune, Yasufumi
, p. 5177 - 5180 (2007/10/02)
Highly stereoselective introduction of a hydroxyl group into the benzylic position of N-tert-butoxycarbonyl-L-tyrosine derivatives was achieved by the use of K2S2O8/CuSO4 system to give the threo cyclic carbamates.These were converted into β-hydroxytyrosine and octopamine, efficiently.
