磁性可分离的CuFe 2 O 4纳米颗粒在水中催化的无配体CS偶联:进入(E)-和(Z)-苯乙烯基- ,杂芳基和空间受阻的芳基硫醚
摘要:
AbstractAn efficient coupling of styrenyl, heteroaryl and sterically hindered aryl halides with aryl‐ and heteroarylthiols catalyzed by the bimetallic Cu and Fe nanomaterial, CuFe2O4, in water in the presence of tetrabutylammonium bromide and potassium phosphate (K3PO4) has been achieved without using any ligand. A series of unsymmetrical functionalized (E)‐ and (Z)‐styrenyl aryl, heteroaryl heteroaryl and sterically hindered aryl aryl sulfides has been obtained by this procedure. The compounds are obtained in high yields and excellent stereoselectivity has been observed for styrenyl sulfides. The catalyst can be easily separated by an external magnet and recycled for ten times without any appreciable loss of activity. This procedure provides an easy access to useful and challenging biologically active organosulfides which are difficult to achieve by other methods.magnified image
[EN] THIAZOLE AND THIADIAZOLE DERIVATIVES, THEIR PREPARATION AND PHARMACEUTICAL COMPOSITIONS USEFUL IN THE TREATMENT OF THROMBOCYTOPENIA<br/>[FR] DERIVES DE THIAZOLE ET DE THIADIAZOLE, LEUR PREPARATION ET COMPOSITIONS PHARMACEUTIQUES UTILES POUR LE TRAITEMENT DE LA THROMBOCYTOPENIE
申请人:——
公开号:WO1996030370A2
公开(公告)日:1996-10-03
[EN] A compound of formula (I) wherein R<1> is hydrogen, etc., R<2> is N- or S-containing unsaturated heterocyclic group, each of which may have suitable substituent(s), X is CH or N and A is (II) or (III) (wherein m is an integer of 0, 1 or 2) and a pharmaceutically acceptable salt thereof, which is useful as a medicament. [FR] Composé de formule (I) dans laquelle R<1> représente hydrogène, etc., R<2> représente un groupe hétérocyclique non saturé contenant N ou S, chacun pouvant posséder un ou plusieurs substituants appropriés, X représente CH ou N et A représente (II) ou (III) (m étant un entier tel que 0, 1 ou 2), et sel pharmaceutiquement acceptable de ce composé, utile en tant que médicament.