Unprecedented Cobalt-Catalyzed Isomerization Reactions to Single Skipped 2,4,7-Trienes Applied in the Synthesis of Urushiol
作者:Anastasia Schmidt、Gerhard Hilt
DOI:10.1002/asia.201402323
日期:2014.9
The cobalt‐catalyzed isomerization of 1,3‐dienes to 2Z,4E‐dienes was realized for the very challenging substrates with an additional double bond in the side chain. An isomerization to the conjugated 3,5,7‐triene derivative was not observed, which is in stark contrast to observations with many other isomerization catalysts. Accordingly, the synthesis of the natural product urushiol, which has a sensitive
对于具有挑战性的底物在侧链中具有额外的双键,实现了1,3二烯到2 Z,4 E二烯的钴催化异构化。未观察到共轭3,5,7-三烯衍生物的异构化,这与许多其他异构化催化剂的观察结果形成鲜明对比。因此,研究了在侧链中具有敏感的2 Z,4 E,7 Z-三烯亚基的天然产物漆酚的合成。O保护的漆酚醇衍生物是选择性生成的,没有异构化为7位双键的共轭3,5,7-三烯或Z / E异构化。