Study on the Synthesis of Benzoic Acid Esters by Transesterification of Crude Methyl Benzoate†

2004 ◽  
Vol 43 (22) ◽  
pp. 6931-6934 ◽  
Author(s):  
Shaokun Tang ◽  
Shufen Li
2010 ◽  
Vol 80 (5) ◽  
pp. 964-967 ◽  
Author(s):  
N. R. Ishkulova ◽  
L. E. Oparina ◽  
L. B. Kochetova ◽  
T. P. Kustova ◽  
N. V. Kalinina ◽  
...  

Author(s):  
Sarah Mazzotta ◽  
Judith Berastegui-Cabrera ◽  
Gabriele Carullo ◽  
Margarita Vega-Holm ◽  
Marta Carretero-Ledesma ◽  
...  

1973 ◽  
Vol 28 (5-6) ◽  
pp. 339-352 ◽  
Author(s):  
Hartmut Schultze

The photolysis of N-aryl-carbamic acid alkyl esters in methanol was investigated. The primary products, amino-benzoic acid esters and aromatic amines, result from photo-Fries rearrangements and splitting processes.2,4,6-Trimethylphenyl-carbamic acid ethyl ester and N-alkyl-carbamic acid alkyl esters form photolysis products only through homolytic splitting reactions.The photooxidation of N-substituted urethanes has been investigated in tert.-butanol. The main products are primary amines and CO2.These initially formed compounds are then further oxidized. In the aliphatic substituted derivatives, oxidation of the N-alkyl group results followed homolytic bond splitting.


1977 ◽  
Vol 55 (1) ◽  
pp. 145-152 ◽  
Author(s):  
Peter Yates ◽  
R. J. Mayfield

The reaction of α-diazoacetophenone (1) with methanolic sodium methoxide in dilute solution gives 3-benzoyl-5-hydroxy-4-phenylpyrazole (4), 3-benzoyl-4-hydroxy-5-phenyl-pyrazole (5), 3-benzoyl-5-methoxy-4-phenylpyrazole (9), 3-benzoyl-4-phenylpyrazole (6), 5-benzoyltetrazole (7), 3,6-dibenzoyldihydro-s-tetrazine (10), cis- and trans- β-benzoyl- α-phenyl-acrylic acid, acetophenone, methyl benzoate, and benzoic acid. The pyrazoles 4, 5, and 9 are considered to arise via reaction of 1 to give α-methoxyacetophenone followed by further reaction of the anion of the latter with 1. Evidence in accord with this view was obtained by a study of the products formed when 1 was treated with methanolic sodium methoxide in the presence of 2-methoxy-4′-methylacetophenone. Acetophenone is considered to arise by reduction of 1 via phenylglyoxal 2-monohydrazone (37); condensation of 1 with the enolate ion derived from acetophenone then can give the pyrazole 6, while condensation of 1 with 37 could give the tetrazole 7.


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