containing a terminal or internal triple bond. A vinylpalladium species formed by chloropalladation of the alkyne inserts one of the double bonds of the diene in a Heck-type reaction. The addition of palladium and chloride over the triple bond is non-stereoselective while the overall 1,4-addition by carbon and chloride over the diene is highly stereoselective and occurs anti. The stereoselectivity of the
已经实现了
钯催化的涉及碳-碳键形成的共轭二烯的1,4-氧化。该反应使用具有包含末端或内部三键的碳链的无环和环状二烯来进行。通过炔的
氯钯钯反应形成的
乙烯基钯物质在Heck型反应中插入了二烯的双键之一。在三键上
钯和
氯化物的加成是非立体选择性的,而在二烯上碳和
氯化物的全部1,4-加成是高度立体选择性的,并且是反式的。
氯化钯的立体选择性取决于
氯化物的浓度,并随底物而变化。