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4-Nitrobenzoic acid is an organic compound with the formula C 6 H 4 (NO 2)CO 2 H. It is a pale yellow solid. It is a precursor to 4-nitrobenzoyl chloride, the precursor to the anesthetic procaine and folic acid. It is also a precursor to 4-aminobenzoic acid. [6]
4-Nitrochlorobenzene is the organic compound with the formula ClC 6 H 4 NO 2. It is a pale yellow solid. 4-Nitrochlorobenzene is a common intermediate in the production of a number of industrially useful compounds, including antioxidants commonly found in rubber. Other isomers with the formula ClC 6 H 4 NO 2 include 2-nitrochlorobenzene and 3 ...
Treatment exclusively with P 2 O 5 results in a mixture of the normal product and an unexpected product, 6-methoxy-1-(4-methoxyphenyl)-3,4-dihydroisoquinoline. The formation of the abnormal product is attributed to the cyclization via the ipso carbon on the phenyl ring to yield a spiro intermediate.
In the Fischer peptide synthesis (Emil Fischer, 1903), [6] an α-chloro acid chloride is condensed with the ester of an amino acid. The ester is then hydrolyzed and the acid converted to the acid chloride, enabling the extension of the peptide chain by another unit. In a final step the chloride atom is replaced by an amino group, completing the ...
The Yamaguchi esterification is the chemical reaction of an aliphatic carboxylic acid and 2,4,6-trichlorobenzoyl chloride (TCBC, Yamaguchi reagent) to form a mixed anhydride which, upon reaction with an alcohol in the presence of stoichiometric amount of DMAP, produces the desired ester. It was first reported by Masaru Yamaguchi et al. in 1979 ...
The Leuckart reaction is the chemical reaction that converts aldehydes or ketones to amines.The reaction is an example of reductive amination. [1] The reaction, named after Rudolf Leuckart, uses either ammonium formate or formamide as the nitrogen donor and reducing agent.
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The acid chloride suffers attack by diazomethane with loss of HCl. The alpha-diazoketone (RC(O)CHN 2) product undergoes the metal-catalyzed Wolff rearrangement to form a ketene, which hydrates to the acid. [16] [17] [4] The rearrangement leaves untouched the stereochemistry at the carbon alpha to the acid chloride. [6]
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