Synthesis of 3-Amino-5-fluoroalkylfurans by Intramolecular Cyclization
作者:Clotilde Plaçais、Morgan Donnard、Armen Panossian、Jean-Pierre Vors、David Bernier、Sergii Pazenok、Frédéric R. Leroux
DOI:10.1021/acs.orglett.1c01672
日期:2021.6.18
A synthesis to access rarely described 3-amino-5-fluoroalkylfurans has been developed by cyclization of easily accessible fluorovinamides. This method is rapid and simple and affords the desired furans as hydrochloride salts in quantitative or nearly quantitative yields. It is compatible with four different fluorinated groups (-CF3, -CF2CF3, -CHF2, and -CF2Cl) and a wide range of substituents on the
Process For The Preparation Of 1-Alkyl And 1-Aryl-5-pyrazolecarboxylic Acid Derivatives
申请人:PAZENOK Sergii
公开号:US20110152532A1
公开(公告)日:2011-06-23
The present invention relates to a process for the preparation of 1-alkyl- or 1-aryl-substituted 5-pyrazolecarboxylic acid derivatives comprising the reaction of substituted 1,3-dioxolanes and 1,4-dioxanes with alkyl- or arylhydrazines to give 1-alkyl- or 1-aryl-substituted dihydro-1H-pyrazoles, and their further reaction to give 1-alkyl- or 1-aryl-substituted 5-pyrazolecarboxylic acid derivatives, which can be used as valuable intermediates for producing insecticidally effective anthranilamides.
Dioxolane and dioxane derivatives and a process for their preparation
申请人:Bayer CropScience AG
公开号:US08222435B2
公开(公告)日:2012-07-17
The present invention relates to novel acylmethylene-1,3-dioxolanes and acylmethylene-1,4-dioxanes of the general formula (I)
in which R1, R2, R3 and n have the meanings given in the description, and also a novel process for their preparation. Acylmethylene-1,3-dioxolanes and acylmethylene-1,4-dioxanes are important intermediates for the preparation of pyrazoles and anthranilamides, which can be used as insecticides.