undergo a stereoselective DielsAlder reaction, giving access to a range of polycyclic heterocycles. The process is compatible with both terminal and internal alkynes, and depending upon the structure of the alkene can give symmetrical or unsymmetrical products. Mechanistic studies have shown that the initial metathesis reaction is between the strained norbornene and Grubbs' catalyst, rather than between
当用 Grubbs 催化剂和末端烯烃处理时,在 5 位和 6 位带有炔丙基氧基取代基的
降冰片烯衍
生物会发生一系列级联的烯炔复分解反应,从而产生杂环二烯,该杂环二烯会发生立体选择性 DielsAlder 反应,从而获得一系列多环杂环. 该方法与末端和内部
炔烃兼容,并且根据烯烃的结构可以得到对称或不对称的产物。机理研究表明,最初的复分解反应发生在应变
降冰片烯和格拉布斯催化剂之间,而不是
炔烃和格拉布斯催化剂之间。