... In our case, however, the observed high stereospecificity suggested that the reaction mechanism is different from that of Toke. ... Byers, J. In Radicals in Organic Synthesis; Renaud, P.; Sibi, MP, Eds.; Wiley-VCH: Weinheim, Germany, 2001; Vol. ... (c) Curran, DP; Chang, C.-T. J. Org. ...