Catalyst‐Controlled Regiodivergent Synthesis of α/β‐Dipeptide Derivatives via
<i>N</i>
‐Allylic Alkylation of
<i>O‐</i>
Alkyl Hydroxamates with MBH Carbonates
A catalyst-controlled switchable N-allylic reaction of O-alkyl hydroxamates with MBH carbonates is reported, providing a regiodivergent method for α/β-dipeptides derivatives.
The direct conversion of various carboxylic acids, that include stericallyhindered amino acids and di-peptides, to O-benzyl hydroxamates is demonstrated using sulfonate esters of benzotriazoles under ambient and milder conditions without significant racemization. This simple and efficient protocol is extended to the synthesis of O-benzyl hydroxamates, using in situ generated solid supported TsOBt
prepared. Judging from the result of model dipeptide (Z-Ala-Phe-OMe) formation, these compounds are found to be new effective additives for peptidesynthesis by the dicyclohexylcarbodiimide (DCC) method at the points of high yield and no detectable racemization.
[EN] INHIBITORS OF INDOLEAMINE 2,3-DIOXYGENASE<br/>[FR] INHIBITEURS D'INDOLÉAMINE 2,3-DIOXYGÉNASE
申请人:NETHERLANDS TRANSLATIONAL RES CENTER B V
公开号:WO2017153459A1
公开(公告)日:2017-09-14
The invention relates to a compound of Formula (I), or pharmaceutically acceptable enantiomers, or salts thereof. The present invention also relates to the use of compounds of Formula (I) as selective inhibitors of indoleamine 2,3-dioxygenase. The invention also relates to the use of the compounds of Formula (I) for the treatment or prevention of diseases cancer, infections, central nervous system disease or disorder, and immune-related disorders, either as a single agent or in combination with other therapies.