Effect of Sulfonyl Protecting Groups on the Neighboring Group Participation Ability of Sulfonamido Nitrogen
作者:Nicolas Proust、Judith C. Gallucci、Leo A. Paquette
DOI:10.1021/jo900065q
日期:2009.4.3
operates predominantly, electron-releasing groups also foster a ring-contraction process with ultimate 1,3-positioning of the pair of bromine atoms. The observed regio- and stereoselectivities, confirmed where necessary by X-ray crystallographic analysis, establish the capability of sulfonamide nitrogen centers to engage in neighboringgroupparticipation.