o-Acylbenzonitriles: Synthesis and Heterocyclization under Acid Hydrolysis of the Cyano Group
摘要:
2-Cyanobenzophenones were synthesized by reaction of 2-bromobenzophenones with copper(I) cyanide in DMF, and their transformations involving acid hydrolysis of the cyano group were studied. Reactions of o-benzoylbenzonitriles with trifluoroacetic acid in the presence or in the absence of sulfuric acid afforded 3-hydroxyphthalimidines in high yields. Under analogous conditions, benzonitriles having no acyl group in the ortho position were converted to the corresponding benzamides. 2-Cyanobenzophenones reacted with sulfuric acid in the absence of trifluoroacetic acid to give only substituted anthraquinones.
Palladium catalyzed intramolecular nucleophilic addition of allylic species, generated from allene, to aryl aldehydes and ketones
作者:Xinjie Gai、Ronald Grigg、Simon Collard、Jayne E. Muir
DOI:10.1039/b005740l
日期:——
2-Haloaryl aldehydes and ketones react with allene (1 atm) in the presence of 2 mol% of a non-phosphine cyclopalladated catalyst to afford cyclopentenols and cyclohexenols via nucleophilic cyclisation of intermediate π-allylpalladium species. A possible mechanism for this unusual reactivity is suggested.
Hydrochloric acid as an efficient catalyst for intermolecular condensation of alcohols. A simple and highly efficient synthesis of unsymmetrical ethers from benzylic alcohols and alkanols
作者:S. S. Mochalov、A. N. Fedotov、E. V. Trofimova、N. S. Zefirov
DOI:10.1134/s107042801509002x
日期:2015.9
Benzylic alcohols and diarylmethanols with electron-donating substituents in the aromatic ring reacted with aliphatic alcohols in the presence of a catalytic amount of HCl to give the corresponding alkyl arylmethyl ethers. The reactivity of diarylmethanols in the intermolecular dehydration depended on the nature of substituents in the aromatic rings and structure of aliphatic alcohol.
Reductive Heterocyclization of 2-Cyanobenzophenones by the Action of NaBH4. New Efficient Synthesis of 3-Arylphthalides
作者:S. S. Mochalov、A. N. Fedotov、E. V. Trofimova、N. S. Zefirov
DOI:10.1134/s1070428018040085
日期:2018.4
The reduction of 2-cyclopropylcarbonyl-, 2-(thiophen-2-yl)carbonyl-, and 2-arylcarbonylbenzonitriles with sodium tetrahydridoborate afforded 3-cyclopropyl-, 3-(2-thiophen-2-yl)-, and 3-arylphthalides, respectively, in high yields. Under analogous conditions, 3-cyanobenzophenones were converted to the corresponding 3-cyanobenzhydrols.
o-Acylbenzonitriles: Synthesis and Heterocyclization under Acid Hydrolysis of the Cyano Group
作者:S. S. Mochalov、A. N. Fedotov、E. V. Trofimova、N. S. Zefirov
DOI:10.1134/s1070428018030065
日期:2018.3
2-Cyanobenzophenones were synthesized by reaction of 2-bromobenzophenones with copper(I) cyanide in DMF, and their transformations involving acid hydrolysis of the cyano group were studied. Reactions of o-benzoylbenzonitriles with trifluoroacetic acid in the presence or in the absence of sulfuric acid afforded 3-hydroxyphthalimidines in high yields. Under analogous conditions, benzonitriles having no acyl group in the ortho position were converted to the corresponding benzamides. 2-Cyanobenzophenones reacted with sulfuric acid in the absence of trifluoroacetic acid to give only substituted anthraquinones.
Synthesis and antiinflammatory activity of some new derivatives of 6-benzoyl-1,4-benzodioxane
作者:L. K. Labanauskas、A. B. Brukshtus、P. G. Gaidelis、É. B. Udrenaite、V. K. Daukshas