[EN] SUBSTITUTED PYRAZOLO[1,5-a]PYRIMIDINE COMPOUNDS AS mTOR INHIBITORS<br/>[FR] COMPOSÉS PYRAZOLO[1,5-A]PYRIMIDINE SUBSTITUÉS UTILISÉS COMME INHIBITEURS DE MTOR
申请人:ARRAY BIOPHARMA INC
公开号:WO2011029027A1
公开(公告)日:2011-03-10
Compounds of Formula I: and salts thereof in which R1, R2, R2a, R3, n, X and ring B have the meanings given in the specification, are inhibitors of mTOR and are useful in the treatment of diseases which are sensitive to inhibition of mTOR, such as cancers.
selectivity. trans-Oxazolidinones were prepared from acyclic secondary N-mesyloxycarbamates using Rh2(oct)4. The selectivity was reverted with a cytoxazone N-mesyloxycarbamate precursor using large chiralrhodium(II) carboxylate complexes, affording the corresponding cis-oxazolidinone. This orthogonal selectivity was used to achieve the formal synthesis of (−)-cytoxazone.
A biocatalyticapproach towards a range of 4‐aryloxazolidinones is developed using a halohydrin dehalogenase from Ilumatobacter coccineus (HheG) as biocatalyst. The method is based on the HheG‐catalyzed α‐position regioselective ring‐opening of styrene oxide derivatives with cyanate as a nucleophile, producing the corresponding 4‐aryloxazolidinones in moderate to good yields. Synthesis of enantiopure
enantio‐ and regioselective ring‐opening of styrene oxides with cyanate was developed by using the halohydrin dehalogenase HheC from Agrobacterium radiobacter AD1, generating the corresponding chiral 5‐aryl‐2‐oxazolidinones in up to 47% yield and 90% ee. Additionally, the origin of enantioselectivity and regioselectivity of the HheC‐catalyzed cyanate‐mediatedring‐opening process was uncovered by single