856771-93-2Relevant articles and documents
A recyclable palladium-catalyzed synthesis of 2-methylene-2,3- dihydrobenzofuran-3-ols by cycloisomerization of 2-(1-hydroxyprop-2-ynyl)phenols in ionic liquids
Mancuso, Raffaella,Gabriele, Bartolo
, p. 10901 - 10911 (2013/10/22)
A recyclable palladium-catalyzed synthesis of 2-methylene-2,3- dihydrobenzofuran-3-ols 2 by heterocyclization of 2-(1-hydroxyprop-2-ynyl) phenols 1 in an ionic liquid medium (BmimBF4) is presented. The process takes place under relativelyn mild conditions (100 °C, 5 h) in the presence of catalytic amounts (2 mol %) of PdI2 in conjunction with KI (5 equiv with respect to PdI2) and an organic base, such as morpholine (1 equiv with respect to 1), to give 2 in high yields (70%-86%). The PdI 2-KI catalytic system could be recycled up to six times without appreciable loss of activity. Moreover, products 2 could be easily converted in a one-pot fashion into 2-hydroxymethylbenzofurans 3 (52%-71%, based on 1) and 2-methoxymethylbenzofurans 4 (52%-80%, based on 1) by acid-catalyzed allylic isomerization or allylic nucleophilic substitution.
Palladium-catalyzed direct arylation of polysubstituted benzofurans
Carrer, Amandine,Brinet, Dimitri,Florent, Jean-Claude,Rousselle, Patricia,Bertounesque, Emmanuel
experimental part, p. 1316 - 1327 (2012/03/27)
An efficient access to 2-substituted 3-arylbenzofurans through a palladium-catalyzed C3 direct arylation of 2-substituted benzofurans with aryl bromides is described. The scope and limitation of this reaction was studied. The method tolerates a variety of functional groups on the aryl halide and has been successfully extended to polysubstituted benzofurans to obtain the corresponding 3-arylbenzofurans with good to excellent yields.
CARBOXAMIDE DERIVATIVE
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Page/Page column 107-108, (2010/11/08)
An SGLT inhibitor comprising a compound of the formula: (|) wherein the ring A is an optionally substituted ring; R1 is an optionally substituted hydrocarbon group, etc.; each of R2 and R3 independently is a hydrogen atom, an optionally substituted hydrocarbon group, etc.; R4 is an optionally substituted hydrocarbon group, etc.; and X is a bivalent chain group whose main chain consists of 1 to 6 atoms. This SGLT inhibitor is useful as a preventive/therapeutic agent for diabetes mellitus, obesity, hypertension, hyperlipemia, etc.