33779-03-2Relevant articles and documents
A highly convenient, efficient, and selective process for preparation of esters and amides from carboxylic acids using Fe3+-K-10 montmorillonite clay
Srinivas,Das, Biswanath
, p. 1165 - 1167 (2003)
In the presence of Fe3+-K-10 montmorillonite clay as a catalyst, aliphatic carboxylic acids selectively produced the corresponding esters in the presence of aromatic carboxylic acids by treatment with alcohols. Both the aliphatic and aromatic carboxylic acids formed the amides by reacting with the aliphatic amines, but only the aliphatic carboxylic acids yielded the anilides by treatment with aromatic amines. The catalyst is recoverable and recyclable.
Synthesis and antifungal activity of 7-methyl-7-hydroxy-2,3-benzo[c]octa-1, 6-olide
Zhao, Jin,Dong, Hong-Bo,Yang, Ming-Yan,Du, Juan,Jiang, Jia-Zheng,Wang, Ming-An
, p. 312 - 317 (2014/02/14)
The racemic 7-methyl-7-hydroxy-2,3-benzo[c]octa-1,6-olide, the analog of natural product (6R)-3,7-dimethyl-7-hydroxy-2-octen-1,6-olide, was totally synthesized using easily available (E)-2-(2-carboxyvinyl)benzoic acid as a raw material in nine-step reacti
Functionalized esters as bis-electrophiles in a silicon-induced domino synthesis of annulated carbocycles
Genrich, Florian,Harms, Guido,Schaumann, Ernst,Gjikaj, Mimoza,Adiwidjaja, Gunadi
experimental part, p. 5577 - 5587 (2009/12/03)
The reaction of silyl-substituted carbanion 1b with arene-1,2-dicarboxylates 6, 15 yields indenone derivatives 11, 16 in a domino process involving silyl C→O migration and elimination. However, in a competing pathway, the initial addition of 1b leads to l
Ozonolysis of enol ethers. Part 10. Ozonization of enol ethers from 1,2- and 1,3-dicarbonyl compounds: Direct quantitative synthesis of phthalonic acid anhydride
Schank, Kurt,Beck, Horst,Pistorius, Susanne
, p. 2025 - 2049 (2007/10/03)
The results of ozonolyses of enol ethers from 1.2- and 1.3-dicarbonyl compounds presented here strongly indicate that these reactions do not proceed via the established Criegee ozonolysis mechanism for nucleophilic C=C bonds. The quantitative one-step synthesis of phthalonic acid anhydride via ozonolysis of 2-(methoxymethyliden)-1H-inden-1.3(2H)-dione (28a) is described. Furthermore, a revision of the theory of alkene ozonolysis in the presence of tetracyanoethylene (TCNE) is proposed on the basis of a single-electron-transfer (SET) chemistry.
A Simple and Efficient Selective Esterification of Aliphatic Carboxylic Acids in the Presence of Aromatic Carboxylic Acids
Das, Biswanath,Venkataiah, B.,Madhusudhan, P.
, p. 59 - 60 (2007/10/03)
Aliphatic carboxylic acids were esterificated selectively at room temperature in the presence of aromatic carboxylic acids by treatment with alcohols in the presence of silica gel supported NaHSO4 catalyst.
An efficient and regiospecific esterification of dioic acids using PTSA
Rama Devi,Rajaram
, p. 294 - 296 (2007/10/03)
Regiospecific mono alkyl esters of dioic acids have been obtained in excellent yield using PTSA as a catalyst. This method is mild and simpler than the previous methods.
A simple method for the preparation of monomethyl esters of dicarboxylic acids by selective esterification of the nonconjugated carboxyl group in the presence of an aromatic or conjugated carboxyl group
Ram, Ram N.,Meher, Nabin Kumar
, p. 282 - 283 (2007/10/03)
Various dicarboxylic acids have been converted selectively into monomethyl esters in which the nonconjugated carboxyl group is selectively esterified in the presence of an aromatic or conjugated carboxyl group at room temperature (~ 25-27°C) in methanol using a catalytic amount of thionyl chloride.
Ring opening of cyclic anhydrides: Synthesis of achiral half-esters using Lewis acids
Sabitha, Gowravaram,Srividya,Yadav
, p. 4015 - 4018 (2007/10/03)
A rapid and high yield preparation of half-esters from cyclic anhydrides using alcohols and Lewis acids is described.
Hemirubin: An Intramolecularly Hydrogen-Bonded Analogue for One-Half Bilirubin
Chen, Qingqi,Lightner, David A.
, p. 2665 - 2675 (2007/10/03)
A model for one-half bilirubin, the neurotoxic yellow-orange pigment of jaundice, 9-[2-(2-carboxyethyl)benzyl]-2,3,7,8-tetramethyl-l,10-dihydrodipyrrin (1, hemirubin) was synthesized following SnCl4-catalyzed Friedel-Crafts acylation at C(9) of
A selective method for the preparation of aliphatic methyl esters in the presence of aromatic carboxylic acids
Rodriguez,Nomen,Spur,Godfroid
, p. 8563 - 8566 (2007/10/03)
2,2-Dimethoxypropane, methanol and a catalytic amount of HCl selectively esterify aliphatic carboxylic acids, in the presence of aromatic carboxylic acids, at room temperature and in high yields.