Iron-Catalyzed Regio- and Stereoselective Conjugate Addition of Aryl-Grignard Reagents to α,β,γ,δ-Unsaturated Sulfones and its Synthetic Application
作者:Takeshi Hata、Takuya Nakada、Yun Taek Oh、Naoki Hirone、Hirokazu Urabe
DOI:10.1002/adsc.201201124
日期:2013.6.17
iron‐catalyzed δ‐addition of aryl‐Grignard reagents to α,β,γ,δ‐unsaturated sulfones proceeded in a regio‐ and stereoselective manner to give cis‐4‐aryl‐2‐alkenyl sulfones. Allylic alkylation of the resultant products was performed without isomerization of the cis‐olefin to give cis‐4‐aryl‐1,1‐dialkyl‐2‐alkenyl sulfones, which upon intramolecular Friedel–Crafts reaction with aluminum chloride gave 1
芳基格氏试剂在α,β,γ,δ不饱和砜上的铁催化δ加成以区域选择性和立体选择性方式进行,得到顺式-4-芳基-2-烯基砜。在不使顺式烯烃异构化的情况下进行所得产物的烯丙基烷基化反应,得到顺式-4-芳基-1,1-二烷基-2-烯基砜,在分子内Friedel-Crafts与氯化铝反应后得到1,4-二氢萘有一个四级碳原子中心