1125812-58-9Relevant academic research and scientific papers
Method for synthesizing 3 -chloro -5 -trifluoromethyltrifluoroacetophenone
-
, (2021/11/14)
The invention discloses a method for synthesizing 3 -chloro -5 -trifluoromethyltrifluoroacetophenone, which comprises the following steps: firstly bromination and rechlorination of o-aminotrifluorotoluene to obtain 4 - bromo -2 - chloro -6 - trifluoromethylaniline. 4 - Bromo -2 - chloro -6 - trifluoromethylaniline was subjected to diazotization followed by treatment with hypophosphorous acid or ethanol to give the deamination compound 1 - bromo -3 - chloro -5 - (trifluoromethyl) benzene. 1 - Bromo -3 - chloro -5 - (trifluoromethyl) benzene was made into Grignard reagent with magnesium chips and reacted with the acylating agent to give 3 - chloro -5 - trifluoromethyltrifluoroacetophenone. The starting material ortho-aminotrifluorotoluene used in the route is a common chemical with cheap price, and the obtained product is high in purity and yield, relatively small in environmental pollution and expected to be used for large-scale industrial production.
Preparation method of trifluoroacetophenone derivative
-
Paragraph 0037; 0040-0041; 0046; 0048; 0052; 0066-0075; 0079, (2021/10/05)
The invention relates to the field of organic synthesis, in particular to a preparation method of a trifluoroacetophenone derivative. Substituted aniline is used as a raw material, and preparation of the trifluoroacetophenone derivative is completed through three steps including diazotization reaction, coupling reaction and hydrolysis reaction. The preparation method has the advantages of simple process, high yield and less three wastes generated by the whole reaction, and is suitable for large-scale industrial production.
Preparation method of 1-[3-chloro-5-(trifluoromethyl) phenyl]-2, 2, 2-trifluoroethanone and derivatives thereof
-
, (2021/05/12)
The invention relates to the field of synthesis of drug intermediates, in particular to a preparation method of 1-[3-chloro-5-(trifluoromethyl) phenyl]-2, 2, 2-trifluoroethanone and derivatives thereof, and the method comprises the following steps: synthe
HYDRAZIDE COMPOUND AND ITS APPLICATION FOR CONTROLLING HARMFUL ARTHROPOD
-
Paragraph 0129, (2018/10/31)
PROBLEM TO BE SOLVED: To provide a composition having excellent controlling effect on harmful arthropod. SOLUTION: There is provided a hydrazide compound represented by the formula (1), where X1 and X2 are the same or different and represent a halogen atom, R1 represents hydrogen or a methyl group, R2 represents a C1 to C12 chain hydrocarbon group which may have a group selected from a group E1, a C3 to C12 cyclic hydrocarbon group which may have a group selected from a group E2, a 5 to 6-membered hetero cyclic group which may have a group selected from the group E2, an OR3 group, a N(R4)R5 group or a hydrogen atom. The compound has excellent controlling effect on harmful arthropod. COPYRIGHT: (C)2015,JPO&INPIT
Haloalkyl-substituted amides as insecticides and acaricides
-
Page/Page column 40, (2011/05/08)
The present invention relates to halogen-substituted amide derivatives of the general formula (I)in which R1 to R6, Q1 to Q8, A, V, W, X, Y, n and m are each defined as described in the descriptionand to a process for preparation thereof and to the use th
METHOD FOR PREPARING 3-TRIFLUOROMETHYL CHALCONES
-
Page/Page column 51, (2009/11/29)
Disclosed is a method for preparing a compound of Formula 1 wherein Q and Z are as defined in the disclosure comprising distilling water from a mixture comprising a compound of Formula 2, a compound of Formula 3, a base comprising at least one compound selected from the group consisting of alkaline earth metal hydroxides of Formula 4 wherein M is Ca, Sr or Ba, alkali metal carbonates of Formula 4a wherein M1 is Li, Na or K, 1,5-diazabicyclo[4.3.0]non-5-ene and 1,8-diazabicyclo[5.4.0]undec-7-ene, and an aprotic solvent capable of forming a low-boiling azeotrope with water. Also disclosed is a method for preparing a compound of Formula 2 comprising (1) forming a reaction mixture comprising a Grignard reagent derived from contacting a compound of Formula 5 wherein X is Cl, Br or I with magnesium metal or an alkylmagnesium halide in the presence of an ethereal solvent, and then (2) contacting the reaction mixture with a compound of Formula 6 wherein Y is OR11 or NR12 R13, and R11, R12 and R13 are as defined in the disclosure. Further disclosed is a method for preparing a compound of Formula 7 wherein Q and Z are as defined in the disclosure, using a compound of Formula 1 characterized by preparing the compound of Formula 1 by the method disclosed above or using a compound of Formula 1 prepared by the method disclosed above.
