Lewis acid promoted Mannich type reactions of α,α-dichloro aldimines with potassium organotrifluoroborates
作者:Sara Stas、Kourosch Abbaspour Tehrani
DOI:10.1016/j.tet.2007.06.003
日期:2007.9
Potassium phenylethynyltrifluoroborate and potassium styryltrifluoroborates react with α,α-dichlorinated aldimines in the presence of BF3·OEt2 as a Lewis acid to give a new stable class of functionalized propargylamines and allylamines. The use of hexafluoroisopropanol as a co-solvent in this modified Petasis reaction allows high yield isolation of the target compounds.