PROCESS FOR PREPARING SULFONAMIDOBENZOFURAN DERIVATIVES
申请人:Priem Thomas
公开号:US20130023678A1
公开(公告)日:2013-01-24
The invention relates to a process for preparing 5-sulfonamido-benzofuran derivatives of general formula: formula (I) in which R represents an alkyl or aryl group and R
1
and R
2
represent hydrogen or an alkyl or aryl group. According to the invention, the compounds of formula I are prepared by coupling a benzofuran derivative of general formula II, where X represents chlorine, bromine or iodine or a sulfonate group: formula (II) with a sulfonamide derivative of formula R—SO
2
—NH
2
, in the presence of a basic agent and of a catalyst system formed from a complex between a palladium compound and a ligand.
METHOD FOR PREPARING 3-KETO-BENZOFURANE DERIVATIVES
申请人:Bailly Fréderic
公开号:US20130165673A1
公开(公告)日:2013-06-27
The invention relates to a method for preparing 3-keto-benzofurane derivatives of the general formula: Formula (I), where R is an alkyl or aryl group, R
1
is hydrogen or an alkyl or aryl group, and R
2
is a substituted alkyl or phenyl group. Said preparation method involves coupling a derivative of Formula III, where X is chlorine, bromine, or iodine or a sulfonate grouping: Formula (III) with a sulfonamide derivative of the formula R—SO
2
—NH
2
in the presence of a basic agent and a catalytic system formed of a complex between a palladium compound and a ligand.