Topics 7.1 Intromolecular cyclization by electrophile- nucleophile interaction通过亲电试剂和亲核试剂相互作 用的分子内环化 72 Cycloaddition环加成反应 73 Electrocyclic ring closure电环化闭环 74 Ring opening开环 75 Review and worked examples实例Topics • 7.1 Intromolecular cyclization by electrophile￾nucleophile interaction 通过亲电试剂和亲核试剂相互作 用的分子内环化 • 7.2 Cycloaddition 环加成反应 • 7.3 Electrocyclic ring closure 电环化闭环 • 7.4 Ring opening 开环 • 7.5 Review and worked examples 实例