Cross type of diene-transmissive Diels-Alder cycloaddition has been demonstrated by using two bis-silyloxy cross-conjugated trienes. The first cycloaddition stage of cross reaction, which has to be highly selective in the formation of mono-cycloadducts, has been performed by the reactions of an activated triene with cyclic olefins or those of trienes with acyclic olefins.The secod cycloadditions with a variety of dienophiles provide cross types of bis-adducts. The characteristics of these cross reactios are discussed.
通过使用两种双
硅氧交叉共轭
三烯,验证了交叉型二
烯传递Diels-Alder环加成反应。交叉反应的第一步环加成阶段,必须在单环加成物的形成中高度选择性,已经通过活化
三烯与环
烯烃或
三烯与非环
烯烃的反应完成。与各种二
烯亲和剂的第二次环加成提供了交叉类型的双加成物。这些交叉反应的特征进行了讨论。