Ammonium oxazole- and amino oxazolium intermediates, methods for their preparation and their use in the manufacture of insecticidal, acaricidal and nematocidal arylpyrrole derivatives
Oxazole amines as intermediates in the manufacture of insecticidal
申请人:American Cyanamid Company
公开号:US05631379A1
公开(公告)日:1997-05-20
The present invention provides 5-amino-4-aryl-2-perfluoroalkyl-1,3-oxazole derivatives, a method for the preparation of said derivatives and their use as a key intermediate in the manufacture of insecticidal, acaricidal and nematocidal arylpyrrole compounds.
Process for the manufacture of insecticidal arylpyrroles via oxazole
申请人:American Cyanamid Company
公开号:US05446170A1
公开(公告)日:1995-08-29
The present invention provides a process for the manufacture of 2-aryl-5-(perfluoroalkyl)pyrrole-3-carbonitrile comprising the cycloaddition of 5-amino-4-aryl-2-perfluoroalkyl-1,3-oxazole and the appropriate 1,3-dipolarifile. The arylpyrrole-3-carbonitrile product and its derivatives are highly effective insecticidal, acaricidal and nematocidal agents.
Process for the manufacture of 2-aryl-5-perfluoroalkylpyrrole
申请人:American Cyanamid Company
公开号:US05750726A1
公开(公告)日:1998-05-12
There is provided a single step procedure to prepare 2-aryl-5-perfluoroalkylpyrrole derivatives directly from the perfluoroacetylated Strecker reaction product. Said pyrrole derivatives are insecticidal and also useful as precursors to other insecticidal arylpyrrole compounds. Further provided are amide nitrile intermediates, useful in the preparation of insecticidal arylpyrrole compounds.
Process for the manufacture of 2-aryl-5 perfluoroalkylpyrrole derivatives
申请人:American Cyanamid Company
公开号:US05777132A1
公开(公告)日:1998-07-07
There is provided a single step procedure to prepare 2-aryl-5-perfluoroalkylpyrrole derivatives directly from the perfluoroacetylated Strecker reaction product. Said pyrrole derivatives are insecticidal and also useful as precursors to other insecticidal arylpyrrole compounds. Further provided are amide nitrile intermediates, useful in the preparation of insecticidal arylpyrrole compounds.
Method for the preparation of 2-perfluoroalkyl-3-oxazolin-5-one
申请人:AMERICAN CYANAMID COMPANY
公开号:EP0662475A2
公开(公告)日:1995-07-12
There is provided a method for the preparation of a 2-perfluoroalkyl-3-oxazolin-5-one compound of formula (II) comprising reacting an aminonitrile with a perfluoroacylating agent in the presence of a solvent to form a perfluoroalkanoyl aminonitrile intermediate and cyclizing the intermediate in the presence of an acid and at least one molar equivalent of water. Perfluoro-alkanoyl aminonitrile intermediates are also claimed.
wherein
nis an integer of 1,2,3,4,5,6,7 or 8;
Ris
Lis hydrogen or halogen.