LeClef,B. et al., Angewandte Chemie, 1973, vol. 85, p. 445 - 446
作者:LeClef,B. et al.
DOI:——
日期:——
Synthesis and hypoglycemic activity of substituted alkyl- and alkoxyguanidines
作者:Bernard J. Ludwig、David B. Reisner、Mervin Meyer、Leo S. Powell、Leon Simet、Frank J. Stiefel
DOI:10.1021/jm00295a016
日期:1970.1
A structure-reactivity correlation with three slopes in the elimination kinetics of 2-substituted ethyl<i>N</i>,<i>N</i>-dimethylcarbamates in the gas phase
a: the 2-substituted alkyl groups gave a good straight line when log (k/kCH3) vs σ* values (ρ* = − 1.94 ± 0.30, r = 0.977 at 360 °C) were plotted. Slope b: Polar2 substituents gave an approximate straight line with ρ* = − 0.12 ± 0.02, r = 0.936 at 360 °C. Slope c : the correlation of multiple bonded and electron-withdrawing substituents interposed by a methylene group at the 2-position of ethyl N,N-dimethylcarbamate