PROCESS FOR PREPARING BENZOFURAN DERIVATIVES SUBSTITUTED AT POSITION 5

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专利权人:

SANOFI

发明人:

BAILLY, FRÉDERIC,BON, XAVIER,VAYRON, PHILIPPE

申请号：

SG2013004338

公开号：

SG187565A1

申请日:

2011.07.20

申请国别(地区):

SG

年份:

2013

代理人:

摘要：

38AbstractPROCESS FOR PREPARING BENZOFURAN DERIVATIVES SUBSTITUTED AT POSITION 5The invention relates to a process for preparing benzofuran derivatives of general formula I, in which R represents a nitro or ester-COOR group, where R represents an alkyl group, R1 represents hydrogen or an alkyl group and R2 represents hydrogen, a halogen, a hydroxyl, haloalkyl, alkyl, alkoxy, dialkylaminoalkoxy or dialkylaminoalkyl group: by coupling the hydroxylamine with a diketone of general formula III: in order to form an oxime that is then cyclized by heating in order to form the desired compound.

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