Mutagenicity and chemistry of N-nitroso-N-(parasubstituted-benzyl)methylamines
作者:George M. Singer、A. W. Andrews
DOI:10.1021/jm00357a001
日期:1983.3
CH3O greater than CH3 greater than F much greater than COOH. No direct correlation was apparent, nor was there any obvious correlation between biological activity and the extent of base-catalyzedhydrogen-deuteriumexchange at the alpha carbons.
bifunctional activation under neutral conditions to generate key sulfamoyl radicals. It accommodates broad substrate scope and functional group compatibility, enabling late-stagemodifications of bioactive molecules and expanding sulfonamide diversity in organic synthesis.
Quantitative structure-activity relationship of the mutagenicity of substituted N-nitroso-N-benzylmethylamines: possible implications for carcinogenicity
作者:George M. Singer、A. W. Andrews、Shu Mei Guo
DOI:10.1021/jm00151a006
日期:1986.1
The relative mutagenicities of substituted N-nitroso-N-benzylmethylamines have been reexamined from a quantitative structure-activity relationship point of view. Most of the compounds were mutagenic toward Salmonella typhimurium TA 1535 with Aroclor-induced male hamster liver S9 activation. The dose-response data were subjected to a multiple linear regression equation calculated in a stepwise manner, which found that the differences in mutagenicities could be explained primarily by differences in the three-bond path molecular connectivity index, with smaller contributions from sigma and pi. Moreover, a polynomial regression analysis showed that the maximum mutagenicity could be explained by an optimal amount of electron withdrawal by the substituent which would cause a weakening, or activation, of the methylene C-H bond. The possible relevance of these observations to carcinogenesis is discussed.
Synthesis of 1-methyl-1-(substituted benzyl)hydrazines
作者:Donald E. Butler、Susan M. Alexander、John W. McLean、Linda B. Strand
DOI:10.1021/jm00293a008
日期:1971.11
The Use of Potassium/Sodium Nitrite as a Nitrosating Agent in the Electrooxidative
<i>N</i>
‐Nitrosation of Secondary Amines
An efficient and environmentally electrooxidative N-nitrosation of secondary amines using potassium/sodium nitrite as nitrosating agents has been developed. This strategy break through the innate combination of sodium nitrite and a strong acid. The reaction is compatible with the late-stage modification of pharmaceutical compounds and could be conducted in gram scale with high reaction efficiency.