Aryl .pi. participation in additions and solvolyses of endo-3,3-diphenyltricyclo[3.2.1.02,4]oct-6-ene and -oct-6-yl systems
摘要:
The influence of phenyl pi electrons on the strategically located double bond of the endo-3,3-diphenyltricyclo[3.2.1.0(2,4)]oct-6-ene (1) during cycloaddition, electrophilic addition, epoxidation, reduction, cyclopropanation, and radical addition has been investigated both through product identification and relative rate studies. Similar additions to the isomeric exo-3,3-diphenyltricyclo[3.2.1.0(2,4)]oct-6-ene (2) serve as a mechanistic contrast to the reactions of 1. This is the first system that appears to demonstrate radical-initiated LRAMERO (long-range aryl migration with electrocyclic ring opening). Solvolyses of the exo and endo tosylates derived from 1 are also influenced by the underlying phenyl group.
Aryl .pi. participation in additions and solvolyses of endo-3,3-diphenyltricyclo[3.2.1.02,4]oct-6-ene and -oct-6-yl systems
作者:Mehboob Peeran、James W. Wilt、Ramakrishnan Subramanian、David S. Crumrine
DOI:10.1021/jo00053a037
日期:1993.1
The influence of phenyl pi electrons on the strategically located double bond of the endo-3,3-diphenyltricyclo[3.2.1.0(2,4)]oct-6-ene (1) during cycloaddition, electrophilic addition, epoxidation, reduction, cyclopropanation, and radical addition has been investigated both through product identification and relative rate studies. Similar additions to the isomeric exo-3,3-diphenyltricyclo[3.2.1.0(2,4)]oct-6-ene (2) serve as a mechanistic contrast to the reactions of 1. This is the first system that appears to demonstrate radical-initiated LRAMERO (long-range aryl migration with electrocyclic ring opening). Solvolyses of the exo and endo tosylates derived from 1 are also influenced by the underlying phenyl group.