Absolute Rate Constants for α-Amide Radical Reactions
作者:Osama M. Musa、Seung-Yong Choi、John H. Horner、Martin Newcomb
DOI:10.1021/jo9717907
日期:1998.2.1
measured at ambient temperature. Radicals 4a and 4b were employed as radical clocks in indirect kinetic studies to determine rateconstants for reaction of secondary alpha-amide radicals with Bu(3)SnH. The calibrated tin hydride trapping reaction was then employed to determine rateconstants for cyclization of the 1-(diethylcarbamoyl)-5-hexenyl radical (12). The rateconstants for 5-exo cyclizations of secondary