A new route to 2,3,5,6-tetrafluoroterephthal aldehyde and its chemical transformation
摘要:
The title compound was prepared from commercial available and cheaper starting material terephthalolyl chloride by six-step reaction sequence in total 40% yield. Its chemical transformations were also studied. (C) 2003 Elsevier B.V. All rights reserved.
Process for producing 2, 3, 5, 6-tetrachloro-1, 4-benzenedicarboxylic acid
申请人:SDS Biotech K.K.
公开号:US20010025121A1
公开(公告)日:2001-09-27
A process for producing 2,3,5,6-tetrachloro-1,4-benzenedicarboxylic acid, comprising heating 2,3,5,6-tetrachloro-1,4-benzenedicarboxamide together with sulfuric acid exhibiting an acidity function (—Ho) of 10.27 to 14.44 in the presence of water contained in an amount smaller than a stoichiometric value of hydrolysis at 110 to 190° C. This process efficiently produces 2,3,5,6-tetrachloro-1,4-benzenedicarboxylic acid which is a precursor of dimethyl 2,3,5,6-tetrachloro-1,4-benzenedicarboxylate useful as a herbicide.
Process for producing 2,3,5,6-tetrachloro-1,4-benzenedicarboxylic acid
申请人:SDS Biotech K.K.
公开号:US06452046B2
公开(公告)日:2002-09-17
A process for producing 2,3,5,6-tetrachloro-1, 4-benzenedicarboxylic acid, comprising heating 2,3,5,6-tetrachloro-1,4-benzenedicarboxamide together with sulfuric acid exhibiting an acidity function (—Ho) of 10.27 to 14.44 in the presence of water contained in an amount smaller than a stoichiometric value of hydrolysis at 110 to 190° C. This process efficiently produces 2,3,5,6-tetrachloro-1,4-benzenedicarboxylic acid which is a precursor of dimethyl 2,3,5,6-tetrachloro-1,4-benzenedicarboxylate useful as a herbicide.
METHOD FOR PRODUCING HALOGEN-SUBSTITUTED BENZENE DIMETHANOL
申请人:Hagiya Koji
公开号:US20110313197A1
公开(公告)日:2011-12-22
A method for producing a halogen-substituted benzene dimethanol, the method including:
a first step of reacting a compound represented by formula (1) with a compound represented by formula (2) to obtain a dicarboxamide compound represented by formula (3), and
a second step of reducing the dicarboxamide compound using a borohydride compound to obtain a halogen-substituted benzene dimethanol represented by formula (4).