933-88-0Relevant articles and documents
Formamide catalyzed activation of carboxylic acids-versatile and cost-efficient amidation and esterification
Huy, Peter H.,Mbouhom, Christelle
, p. 7399 - 7406 (2019/08/20)
A novel, broadly applicable method for amide C-N and ester C-O bond formation is presented based on formylpyrrolidine (FPyr) as a Lewis base catalyst. Herein, trichlorotriazine (TCT), which is the most cost-efficient reagent for OH-group activation, was employed in amounts of ≤40 mol% with respect to the starting material (100 mol%). The new approach is distinguished by excellent cost-efficiency, waste-balance (E-factor down to 3) and scalability (up to >80 g). Moreover, high levels of functional group compatibility, which includes acid-labile acetals and silyl ethers, are demonstrated and even peptide C-N bonds can be formed. In comparison to reported amidation procedures using TCT, yields are considerably improved (for instance from 26 to 91%) and esterification is facilitated for the first time in synthetically useful yields. These significant enhancements are rationalized by activation by means of acid chlorides instead of less electrophilic acid anhydride intermediates.
CoIII-Catalyzed Isonitrile Insertion/Acyl Group Migration Between C?H and N?H bonds of Arylamides
Kalsi, Deepti,Barsu, Nagaraju,Sundararaju, Basker
supporting information, p. 2360 - 2364 (2018/02/22)
A general efficient and site-selective cobalt-catalyzed insertion of isonitrile into C?H and N?H bonds of arylamides through C?H bond activation and alcohol assisted intramolecular trans-amidation is demonstrated. This straightforward approach overcomes the limitation by the presence of strongly chelating groups. Isolation of CoIII-isonitrile complex B has been achieved for the first time to understand the reaction mechanism.
A O-between the - trifluoromethyl benzoic acid to synthetic method (by machine translation)
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Paragraph 0021-0023, (2017/12/29)
The present invention provides a O-between the - trifluoromethyl benzoic acid to the synthesis method, the method comprises the following steps: (1) between adjacent to methyl benzoic acid acylated preparation between neighbour methyl benzoyl chloride; (2) between the adjacent methyl benzoyl chloride to chlorine light between neighbour trichloromethyl benzoyl chloride is obtained; (3) adjacent to the trichloromethyl benzoyl chloride fluoride obtained between between neighbour trifluoromethyl methyl benzoyle fluoride; (4) adjacent to the trifluoromethyl benzoyle fluoride hydrolysis between the final product is obtained between neighbour trifluoromethyl methyl benzoic acid. The method of the invention cheap raw material, the product yield is high, the process is simple, is favorable for industrial production. (by machine translation)