Catalytic Friedel-Crafts Reactions of Highly Electronically Deactivated Benzylic Alcohols
作者:Vuk D. Vuković、Edward Richmond、Eléna Wolf、Joseph Moran
DOI:10.1002/anie.201612573
日期:2017.3.6
Highly electronically deactivated benzylic alcohols, including those with a CF3 group adjacent to the OH‐bearing carbon, undergo dehydrative Friedel–Crafts reactions upon exposure to catalytic Brønsted acid in 1,1,1,3,3,3‐hexafluoro‐2‐propanol (HFIP) solvent. Titration and kinetic experiments support the involvement of higher order solvent/acid clusters in catalysis.
carbon–carbon bond-forming reaction via deaminative/decarboxylative cross-coupling of organoammonium salts with carboxylicacids was developed. Under the reaction conditions, polyfluoroaromatic carboxylicacids, propiolic acids and α-cyano benzyl carboxylicacid reacted smoothly with benzyl ammonium salts to produce the corresponding carbon–carbon coupling products in good-to-excellent yields.