77614-79-0Relevant academic research and scientific papers
A Major Advance in the Synthesis of Fluoroalkyl Pyrazoles: Tuneable Regioselectivity and Broad Substitution Patterns
Schmitt, Etienne,Panossian, Armen,Vors, Jean-Pierre,Funke, Christian,Lui, Norbert,Pazenok, Sergiy,Leroux, Frédéric R.
, p. 11239 - 11244 (2016/08/03)
A novel approach towards highly functionalized fluoroalkyl pyrazoles was developed by using fluoroalkyl amino reagents in combination with a variety of fluorinated ketimines. Tuneable introduction of fluoroalkyl groups in the 3- and 5-positions was possible by using vinamidinium intermediates or the corresponding enamino ketones after hydrolysis. These high-value building blocks can give rise to a large number of analogues for bioactivity screening and discovering new heterocyclic bioactive ingredients in various life science fields.
Method for the production of 3,5-bis(fluoroalkyl) pyrazole derivatives
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Paragraph 0176; 0177; 0178; 0179; 0180; 0181, (2016/10/10)
The invention relates to a method for producing 3,5-bis(fluoroalkyl) pyrazole derivatives and to the use thereof for producing fungicides. Also claimed are intermediates of formulae (IV) and (III).
METHOD FOR THE PRODUCTION OF 3,5-BIS(FLUOROALKYL)PYRAZOLE DERIVATIVES
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Paragraph 0148; 0149; 0150; 0151, (2016/06/01)
The present invention describes a novel method for preparing 3,5-bis(fluoroalkyl)pyrazole derivatives.
PROCESS FOR PREPARING 3,5-BIS(HALOALKYL)PYRAZOLE DERIVATIVES VIA ACYLATION OF HYDRAZONES
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Page/Page column 13, (2016/01/01)
Process for preparing 3,5-bis(haloalkyl)pyrazole derivatives of the formula (I), via acylation of Hydrazones.
PROCESS FOR PREPARING 3,5-BIS(HALOALKYL)PYRAZOLES VIA ACYLATION OF KETIMINES
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Page/Page column 12, (2016/01/01)
The present invention relates to a novel process for preparing 3,5-bis(haloalkyl)pyrazole derivatives of the formula (Ia) and (Ib), via acylation of ketimines.
PROCESS FOR PREPARING 3,5-BIS(HALOALKYL)PYRAZOLE DERIVATIVES FROM α,α-DIHALOAMINES AND KETIMINES
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Page/Page column 19-20, (2015/11/24)
Process for preparine3,5-bis(haloalkyl)pyrazolederivatives from a,a-dihaloamines and ketimines The present invention relates to a novel process for preparing 3,5-bis(haloalkyl)pyrazole derivatives from a,a-dihaloamines and ketimines. Intermedaites used in the process are also claimed.
A General Approach towards NH-Pyrazoles That Bear Diverse Fluoroalkyl Groups by Means of Fluorinated Iminium Salts
Schmitt, Etienne,Landelle, Grégory,Vors, Jean-Pierre,Lui, Norbert,Pazenok, Sergiy,Leroux, Frédéric R.
supporting information, p. 6052 - 6060 (2015/09/22)
A new and general approach to important fluoroalkyl-substituted pyrazoles has been developed. The approach is based on the use of fluoroalkyl amino reagents and their Lewis acid activation to form a fluoroalkyl iminium salt that acts as a formal "fluoroacyl transfer reagent". Their interaction with readily available fluoroalkyl azines followed by spontaneous cyclization of the formed intermediates under acidic conditions leads to the formation of 3,5-disubstituted pyrazoles. The reaction is extremely versatile, high yielding, and allows quick access to pyrazoles that bear two fluoroalkyl functionalities (identical or different). These compounds are otherwise difficult to prepare. The reaction is scalable and suitable for industrial production.
PROCESS FOR PREPARING 3,5-BIS(HALOALKYL)PYRAZOLE DERIVATIVES FROM α,α-DIHALOAMINES
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Page/Page column 15, (2015/05/26)
The present invention relates to a novel process for preparing 3,5-bis(haloalkyl)pyrazole derivatives.
PROCESS FOR PREPARING 3,5-BIS(FLUOROALKYL)PYRAZOLE DERIVATIVES FROM α,α-DIHALOAMINES
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Page/Page column 15-16, (2014/12/12)
The present invention relates to a novel process for preparing 3,5-bis(fluoroalkyl)pyrazole derivatives from α,α-dihaloamines.
PROCESS FOR THE PREPARATION OF BIS-DIHALOALKYL PYRAZOLES
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, (2014/09/03)
The present invention relates to a process for the preparation of bisdihaloalkyl pyrazoles of formula (V) starting from diketones and acylhalides reacted with a Lewis acid, and a subsequent reaction with a substituted hydrazine.
