Building Units for N-Backbone Cyclic Peptides. 3. Synthesis of Protected Nα-(ω-Aminoalkyl)amino Acids and Nα-(ω-Carboxyalkyl)amino Acids
摘要:
An improved synthesis of a family of amino acids that contain omega-aminoalkyl groups and of a new family containing omega-carboxyalkyl groups linked to the alpha-amine is described. The synthesis was performed by alkylation of suitably monoprotected alkylenediamines and protected omega-amino acids with triflates of alpha-hydroxy acid esters. The reaction proceeded with inversion of configuration yielding optically pure products. The N-alpha-(omega-aminoalkyl)amino acids and N-alpha-(omega-carboxyalkyl)amino acids were orthogonally protected to allow their incorporation into peptides by solid-phase peptide synthesis (SPPS) methodology.
[EN] EIF4E INHIBITORS AND USES THEREOF<br/>[FR] INHIBITEURS D'EIF4E ET LEURS UTILISATIONS
申请人:PIC THERAPEUTICS INC
公开号:WO2021178488A1
公开(公告)日:2021-09-10
The present invention provides compounds inhibiting elF4E activity and compositions and methods of using thereof.
本发明提供了抑制elF4E活性的化合物以及使用它们的组合物和方法。
[EN] 3-SUBSTITUTED PIPERIDINE-2, 6-DIONES AND NON-COVALENT COMPLEXES WITH ALBUMIN<br/>[FR] PIPÉRIDINE-2, 6-DIONES 3-SUBSTITUÉS ET COMPLEXES NON-COVALENTS AVEC L'ALBUMINE
申请人:FL THERAPEUTICS LLC
公开号:WO2016065139A1
公开(公告)日:2016-04-28
The present disclosure provides derivatives of 3-substituted piperidine-2, 6-diones, non-covalently bound complexes with serum albumin, pharmaceutical compositions of the same, and methods of use thereof. The non-covalently bound complexes are significantly more water-soluble than the parent compounds, and are useful for the treatment of a cancer, such as multiple myeloma.
for the preparation of seven-membered cyclic α,β-dipeptides is described. Following coupling of N-protected α-amino acids with N-substituted β-aminoacid tert-butyl esters, that affords linear α,β-dipeptides, the protecting groups at the terminal functionalities were removed and the open-chain dipeptides were cyclized with phenylphosphonic dichloride, PhP(O)Cl2, to give the desired cyclic α,β-dipeptides
α,β-dipeptides as chiralorganocatalysts in the asymmetricMichaeladditionreaction between enolizable aldehydes and N-arylmaleimides or nitroolefins is described. With N-arylmaleimides as substrates, the best results were achieved with dipeptide 2 as a catalyst in the presence of aq. NaOH. Whereas dipeptides 4 and 6 in conjunction with 4-dimethylaminopyridine (DMAP) and thiourea as a hydrogen bond
A highly chemoselective conjugateaddition of alcohols in the presence of amines is described. The cooperative nature of the catalyst enabled chemoselective activation of alcohols over amines, allowing the conjugateaddition to soft Lewis basic α,β‐unsaturated nitriles. Divergent transformation of the nitrile functionality highlights the utility of the present catalysis.