Bioinspired Intramolecular Diels-Alder Reaction: A Rapid Access to the Highly-Strained Cyclopropane-Fused Polycyclic Skeleton
作者:Shifa Zhu、Zhengjiang Guo、Zhipeng Huang、Huanfeng Jiang
DOI:10.1002/chem.201304839
日期:2014.2.24
bioinsipred gold‐catalyzed tandem Diels–Alder/Diels–Alder reaction of an enynal and a 1,3‐diene, forming the highly‐strained benzotricyclo[3.2.1.02,7]octane skeleton, was reported. In contrast, a Diels–Alder/Friedel–Crafts tandem reaction occurred instead when silver salts were used as the catalyst. Although both reactions experienced the similar Diels–Alder reaction of a pyrylium intermediate with a
据报道,生物吸附的金催化的烯类和1,3-二烯的串联Diels-Alder / Diels-Alder反应形成了高应变的苯并三环[3.2.1.0 2,7 ]辛烷骨架。相反,当使用银盐作为催化剂时,发生了狄尔斯-阿尔德/弗里德尔-克拉夫特串联反应。尽管两个反应都经历了类似的吡啶鎓中间体与1,3-二烯的Diels-Alder反应,但它们具有不同的反应机理。前者进行了逐步的Diels-Alder反应,而后者则进行了协调一致的反应。