Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Roger N-Renaud"'
Publikováno v:
Canadian Journal of Chemistry. 55:3456-3463
The conformational properties of seven 5,6,7,12-tetrahydrodibenzo[a,d]cyclooctenes bearing substituents at C-6 have been studied using variable temperature proton nmr spectroscopy. The position of the equilibrium between boat-chair (BC) and twist-boa
Publikováno v:
Canadian Journal of Chemistry. 55:2642-2648
The effect of substituents at the 3-position in a series of N-methyl 5,6-dihydro-7H,12H-di-benzo[c,f]azocines on the geminal coupling constants of the C-12 methylene protons has been determined. The slope of the Hammett plot of 2J vs. σ has been fou
Publikováno v:
Electrochimica Acta. 28:1367-1371
An exploratory study of the electrochemical reduction of benzyl bromides is performed on a preparative scale using a platinum electrode in acetonitrile in the presence of ammonium salts. This work shows that the presence of derivatives of betaine inc
Autor:
Philippe Champagne, Roger N. Renaud
Publikováno v:
Canadian Journal of Chemistry. 57:990-993
The anodic oxidation of sodium acetate in the presence of a series of 1,2-disubstituted ethylenes was performed in acetonitrile–water solution. Under low concentration of substrates, very good yields of the monomeric 1,2-dimethylated products were
Autor:
Roger N. Renaud
Publikováno v:
Canadian Journal of Chemistry. 52:376-380
Electrochemical reduction of 1-chloro-, 1-bromo-, 1-iodo-, 1-chloro-4-methyl-, and 1-bromo-4-methyl naphthalene was done in presence of deuterated water. The deuterium content of the naphthalene obtained reveals that the mechanism for the bromo and t
Autor:
Roger N. Renaud, Philippe Champagne
Publikováno v:
Canadian Journal of Chemistry. 58:1101-1105
The anodic oxidation of the sodium salts of acetic, propionic, and isovaleric acids was performed in the presence of a series of ethylenic compounds bearing electron-withdrawing substituents. The results showed that under certain experimental conditi
Autor:
Roger N. Renaud, John W. Bovenkamp
Publikováno v:
Canadian Journal of Chemistry. 54:3548-3552
The reaction between 2,2′-bis(bromomethyl)diphenylmethane and diethyl sodiomalonate gives mainly 11,11,23,23-tetracarboethoxy-5,10,11,12,17,22,23,24-octahydrotetrabenzo[a,d,i,l]-cyclohexadecene together with some polymeric compounds. No eight-membe
Autor:
Philippe J. Champagne, Roger N. Renaud
Publikováno v:
Canadian Journal of Chemistry. 53:529-534
The electrochemical oxidation of substituted malonic acid half-esters was studied in the presence of trifluoroacetic acid. Some 'crossed' Kolbe products were obtained together with some unsaturated carboalkoxy compounds, trifluoromethylated adducts t
Publikováno v:
Canadian Journal of Chemistry. 62:565-569
The formation of Mannich bases from the electrochemical oxidation of 4-substituted N,N-dimethylaniline in the presence of silyl enol ether was studied. The yield of bases obtained depended on the relative oxidation potentials of the starting amine co
Autor:
Roger N. Renaud, John W. Bovenkamp
Publikováno v:
Canadian Journal of Chemistry. 55:650-655
The eight-membered ring 6,6-dicyano-5,6,7,12-tetrahydrodibenzo[a,d]cyclooctene was prepared from 2,2′-bis(bromomethyl)diphenylmethane and sodiomalononitrile. From this dicyano derivative a series of mono- and disubstituted cyclooctenes was synthesi