IX.—The Synthesis of 8-Bromo-3-methoxyfluoranthene.

1969 ◽  
Vol 68 (2) ◽  
pp. 127-137
Author(s):  
Neil Campbell ◽  
Naim M. Hasan
Keyword(s):  
Acetic Acid ◽  
Carboxylic Acids ◽  
Good Yield ◽  
Related Compounds

SummaryA second method for the synthesis of 8-bromo-3-methoxyfluoranthene from 2-bromo-7-methoxyfluorene is described. The autoxidation of fluorene derivatives including the 9-carboxylic acids and of related compounds, particularly 4-α-cyanobenzyl-7−oxo-7H-benz[de]anthracene, is discussed. Unsuccessful attempts to prepare 3-bromofluorene-9-acetic acid in good yield are reported.

A useful method for preparation of carboxylic acids from terminal alkynes

1983 ◽  
Vol 61 (10) ◽  
pp. 2423-2424 ◽  
Author(s):  
Suzanne R. Abrams
Keyword(s):  
Acetic Acid ◽  
Sulfuric Acid ◽  
Carboxylic Acid ◽  
Carboxylic Acids ◽  
Chain Length ◽  
Good Yield ◽  
Terminal Alkynes ◽  
Terminal Acetylenes ◽  
Long Chain ◽  
Acetic Acids

Substituted acetic acids can be prepared in good yield (50–80%) from terminal acetylenes of the same chain length. The alkyne is first converted to the thiophenyl ether, which is treated without purification with mercuric sulfate in acetic acid and 2 N sulfuric acid affording the carboxylic acid. The method is particularly useful in the synthesis of long chain ω-hydroxyalkanoic acids.

Efficient CDI/CH3SO3H -Catalyzed, Microwave-Assisted Synthesis of 2-Substituted Benzothiazoles

2018 ◽  
Vol 16 (1) ◽  
pp. 34-39
Author(s):  
Yao-Wei Li ◽  
Pei-Ming Zhang ◽  
Rui Li ◽  
Yan Bai ◽  
Yu Yu ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Carboxylic Acids ◽  
1H Nmr ◽  
Good Yield ◽  
Microwave Assisted Synthesis ◽  
Synthetic Method ◽  
Benzothiazole Derivatives ◽  
Microwave Assisted ◽  
Highly Effective

CDI combined with CH3SO3H was found to be highly effective for the cyclization of 2-aminothiophenol derivatives with carboxylic acids under MW condition. Fourteen benzothiazole derivatives were synthesized in good yield and their structures were characterized by 1H-NMR, 13CNMR, IR and mass spectrometry. This simple, rapid synthetic method is believed to provide a useful process for the synthesis of 2-substituted benzothiazole compounds.

The reaction of carboxylic acids with epoxides using lithium naphthalenide

1974 ◽  
Vol 27 (10) ◽  
pp. 2205 ◽  
Author(s):  
T Fujita ◽  
S Watanabe ◽  
K Suga
Keyword(s):  
Carboxylic Acids ◽  
Good Yield ◽  
Hydroxy Acids

Lithium naphthalenide reacts with carboxylic acids in the presence of diethylamine to give the α-anions of lithium carboxylates. Reaction of these anions with various epoxides gives the corresponding y-hydroxy acids in good yield. The γ-hydroxy acids easily cyclize to give γ-butyrolactones.

Preparation of Some 2-(Methoxyphenyl)-2H-benzotriazoles and the Corresponding Hydroxyphenyl Compounds

1987 ◽  
Vol 40 (10) ◽  
pp. 1663 ◽  
Author(s):  
J Rosevear ◽  
JFK Wilshire
Keyword(s):  
Acetic Acid ◽  
Good Yield ◽  
Hydrobromic Acid ◽  
Methoxy Group ◽  
Methylene Chloride ◽  
Thiourea Dioxide ◽  
Boron Tribromide

The reaction of several substituted o- nitronitrosobenzenes with O- and p- anisidine , and 2,4- dimethoxyaniline in acetic acid gives in good yield the corresponding enitroazobenzenes which are readily reduced with thiourea dioxide ( formamidinesulfinic acid) to the corresponding 2-(methoxypheny1)-2H-benzotriazoles, demethylation of which furnished the corresponding 2- (hydroxypheny1)-2H-benzotriazoles. Demethylation of the dimethoxy derivatives was best accomplished with boron tribromide in methylene chloride, the methoxy group located ortho to the benzotriazole ring being demethylated more readily than is the para-methoxy group. The reaction of enitroazobenzenes containing a methoxy group with hydrobromic acid in acetic acid results in cleavage of the azo bond and also partial bromination to give o- nitroaniline and some of its brominated derivatives.

Rhodium-Catalyzed C3-Selective Alkenylation of Substituted Thiophene-2-carboxylic Acids and Related Compounds

2013 ◽  
Vol 78 (14) ◽  
pp. 7216-7222 ◽  
Author(s):  
Tomonori Iitsuka ◽  
Petra Schaal ◽  
Koji Hirano ◽  
Tetsuya Satoh ◽  
Carsten Bolm ◽  
...  
Keyword(s):  
Carboxylic Acids ◽  
Related Compounds

Atmospheric concentrations of formic and acetic acid and related compounds in eastern and northern Austria

1988 ◽  
Vol 22 (12) ◽  
pp. 2841-2850 ◽  
Author(s):  
H. Puxbaum ◽  
C. Rosenberg ◽  
M. Gregori ◽  
C. Lanzerstorfer ◽  
E. Ober ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Atmospheric Concentrations ◽  
Related Compounds
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