Enantioselective synthesis of (L)-Fmoc-α-Me-Lys(Boc)-OH via diastereoselective alkylation of oxazinone as a chiral auxiliary
摘要:
Benzyl (2R,3S)-(-)-6-oxo-2,3-diphenyl-4-morpholinecarboxylate (4) was successively alkylated with methyl iodide and 1,4-diiodobutane using a base. In each alkylation step anti-alkylated product formed exclusively. The iodo group was displaced with azide, which served as a precursor for the side-chain amino function. Catalytic hydrogenation with concomitant cleavage of the chiral auxiliary afforded (L)-alpha-Me-Lys-OH (9) in a total of four steps in good yield. (L)-Fmoc-alpha-Me-Lys(Boc)-OH (16) was obtained from 9 via regioselective benzyloxycarbonylation. Alternately, (L)-Fmoc-alpha-Me-Lys(Boc)-OH (16) was obtained via Staudinger reduction of azide (8) in a total of six steps in good yield. (C) 2009 Elsevier Ltd. All rights reserved.
Enantioselective synthesis of (L)-Fmoc-α-Me-Lys(Boc)-OH via diastereoselective alkylation of oxazinone as a chiral auxiliary
摘要:
Benzyl (2R,3S)-(-)-6-oxo-2,3-diphenyl-4-morpholinecarboxylate (4) was successively alkylated with methyl iodide and 1,4-diiodobutane using a base. In each alkylation step anti-alkylated product formed exclusively. The iodo group was displaced with azide, which served as a precursor for the side-chain amino function. Catalytic hydrogenation with concomitant cleavage of the chiral auxiliary afforded (L)-alpha-Me-Lys-OH (9) in a total of four steps in good yield. (L)-Fmoc-alpha-Me-Lys(Boc)-OH (16) was obtained from 9 via regioselective benzyloxycarbonylation. Alternately, (L)-Fmoc-alpha-Me-Lys(Boc)-OH (16) was obtained via Staudinger reduction of azide (8) in a total of six steps in good yield. (C) 2009 Elsevier Ltd. All rights reserved.
[EN] ORAL PEPTIDE INHIBITORS OF INTERLEUKIN-23 RECEPTOR AND THEIR USE TO TREAT INFLAMMATORY BOWEL DISEASES<br/>[FR] PEPTIDES INHIBITEURS PAR VOIE ORALE DU RÉCEPTEUR DE L'INTERLEUKINE-23 ET LEUR UTILISATION DANS LE TRAITEMENT DES MALADIES INFLAMMATOIRES DE L'INTESTIN
申请人:PROTAGONIST THERAPEUTICS INC
公开号:WO2016011208A1
公开(公告)日:2016-01-21
The present invention provides novel peptide inhibitors of the interleukin-23 receptor, and related compositions and methods of using these peptide inhibitors to treat or prevent a variety of diseases and disorders, including inflammatory bowel disease. In a first aspect, the present invention provides a peptide inhibitor of an interleukin-23 receptor, or a pharmaceutically acceptable salt or solvate thereof, wherein the peptide inhibitor comprises an amino acid sequence of Formula (Xa). In another aspect, the present invention includes a pharmaceutical composition comprising a peptide inhibitor or a peptide dimer inhibitor of the present invention, and a pharmaceutically acceptable carrier.
The present invention provides novel peptidomimetic macrocycles and methods for their preparation and use, as well as amino acid analogs and macrocycle-forming linkers, and kits useful in their production.
US8637686B2
申请人:——
公开号:US8637686B2
公开(公告)日:2014-01-28
US9023988B2
申请人:——
公开号:US9023988B2
公开(公告)日:2015-05-05
Enantioselective synthesis of (L)-Fmoc-α-Me-Lys(Boc)-OH via diastereoselective alkylation of oxazinone as a chiral auxiliary
作者:Satendra S. Chauhan
DOI:10.1016/j.tetlet.2009.09.148
日期:2009.12
Benzyl (2R,3S)-(-)-6-oxo-2,3-diphenyl-4-morpholinecarboxylate (4) was successively alkylated with methyl iodide and 1,4-diiodobutane using a base. In each alkylation step anti-alkylated product formed exclusively. The iodo group was displaced with azide, which served as a precursor for the side-chain amino function. Catalytic hydrogenation with concomitant cleavage of the chiral auxiliary afforded (L)-alpha-Me-Lys-OH (9) in a total of four steps in good yield. (L)-Fmoc-alpha-Me-Lys(Boc)-OH (16) was obtained from 9 via regioselective benzyloxycarbonylation. Alternately, (L)-Fmoc-alpha-Me-Lys(Boc)-OH (16) was obtained via Staudinger reduction of azide (8) in a total of six steps in good yield. (C) 2009 Elsevier Ltd. All rights reserved.