Lewis Acid Mediated Vinyl-Transfer Reaction of Alkynes to<i>N</i>-Alkylimines by Using the<i>N</i>-Alkyl Residue as a Sacrificial Hydrogen Donor
作者:Chandi C. Malakar、Sara Stas、Wouter Herrebout、Kourosch Abbaspour Tehrani
DOI:10.1002/chem.201300469
日期:2013.10.11
A variety of N‐alkyl‐α,α‐dichloroaldimines were vinylated by terminal acetylenes in the presence of Lewis acids such as In(OTf)3 or BF3⋅OEt2 and hexafluoroisopropanol (HFIP) as an additive. The reaction proceeds at ambient temperature and leads to geometrically pure allylic β,β‐dichloroamines. This approach is complementary to previously reported transition‐metal‐catalyzed vinyl‐transfer methods, which