The present invention relates to compounds of the formula
which are useful in treating diseases characterized by the hyperactivity of MEK. Accordingly the compounds are useful in the treatment of diseases, such as, cancer, cognative and CNS disorders and inflammatory/autoimmune diseases.
Preparation and properties of unsymmetrical benzoins and related compounds
作者:John E.T. Corrie
DOI:10.1016/s0040-4020(98)00214-2
日期:1998.5
Synthesis of unsymmetrical benzoins and their esters can be compromised by isomerisation via the enediol (or its anion). This could be avoided by suitable reaction conditions for the benzoins and their esters 2a/b and 3a/b but not for the 3-furyl compound 4a. A convenient synthesis of 3,5-dimethoxy-2,4,6-trimethylbenzaldehyde 10 is described and the compound was converted to the hindered benzoin 5a
Mutasynthesis of Glycopeptide Antibiotics: Variations of Vancomycin's AB-Ring Amino Acid 3,5-Dihydroxyphenylglycine
作者:Stefan Weist、Claudia Kittel、Daniel Bischoff、Bojan Bister、Volker Pfeifer、Graeme J. Nicholson、Wolfgang Wohlleben、Roderich D. Süssmuth
DOI:10.1021/ja0499389
日期:2004.5.1
In the mutasynthetic approach, the DeltadpgA mutant of the vancomycin-typeglycopeptideantibiotic producer Amycolatopsis balhimycina, which is deficient in the synthesis of 3,5-dihydroxyphenylglycine (DPg), was supplemented with synthetic DPg analogues to obtain the corresponding modified glycopeptides. Sterically more demanding 3,5-disubstituted methoxy derivatives as well as monosubstituted DPg
Chiral 2-hydroxypropanone derivatives 5a−v, 8a−d, and 10a, b were formed by benzoylformate decarboxylase (BFD) catalyzed C−C bond formation. A donor aldehyde and acetaldehyde as an acceptor were carboligated in aqueous buffer solution with remarkable ease in high chemical yield and good to high optical purity. The substrate range of this thiamin diphosphate dependent enzyme was examined to employ this