Synthesis of constrained mimics of a serine dipeptide is described. Triflated 3-hydroxypicolinic acid methyl ester was carbo-substituted using ethynylstannanes with Pd-catalysis to furnish 3-acetylenic pyridines which were hydrolysed and coupled to Ser(t-Bu)OMe before cyclization to 1-alkylidene-3-oxo-1,3-dihydropyrrolo [3,4-b]pyridine derivatives. Subsequent deprotection provided the dipeptide analogue.
BENZAZOLE DERIVATIVES, COMPOSITIONS, AND METHODS OF USE AS B-SECRETASE INHIBITORS
申请人:Transtech Pharma, Inc.
公开号:EP1863771A2
公开(公告)日:2007-12-12
[EN] BENZAZOLE DERIVATIVES, COMPOSITIONS, AND METHODS OF USE AS B-SECRETASE INHIBITORS<br/>[FR] DERIVES DE BENZAZOLE, COMPOSITIONS ET METHODES D'UTILISATION DES DERIVES COMME INHIBITEURS DE LA B-SECRETASE
申请人:TRANSTECH PHARMA INC
公开号:WO2006099379A2
公开(公告)日:2006-09-21
[EN] The present invention is directed to benzazole compounds that inhibit ß-site amyloid precursor protein-cleaving enzyme (BACE) and that may be useful in the treatment or prevention of diseases in which BACE is involved, such as Alzheimer's disease. The invention is also directed to pharmaceutical compositions comprising these compounds and the use of these compounds and compositions in the prevention or treatment of such diseases in which BACE is involved. [FR] La présente invention concerne des composés de benzazole qui inhibent l'enzyme intervenant dans le clivage de la protéine précurseur bêta-amyloïde (BACE), et peuvent être utiles dans le traitement ou la prévention de maladies dans lesquelles BACE est impliquée, telles que la maladie d'Alzheimer. L'invention concerne également des compositions pharmaceutiques comprenant ces composés, et l'utilisation de ces composés et compositions dans la prévention ou le traitement des maladies dans lesquelles BACE est impliquée.
Iodolactonization of 3‐Alkynylthiophene‐2‐Carboxylic and 3‐Alkynylpicolinic Acids for the Synthesis of Fused Heterocycles
Iodothienopyranones and iodopyranopyrimidinones are obtained under mild reaction conditions (25–40 °C, 2–3 equiv. of I2 and NaHCO3 in MeCN) by iodolactonization of readily available 3‐alkynylthiophene‐2‐carboxylic and 3‐alkynylpicolinic acids, respectively.