Abstract—Hunsdiecker reactions with a,b-unsaturated carboxylic acids were conducted under solvent-free conditions in the presence of a few drops of
HNO3 together with a variety of metal nitrates [Mg(NO3)2, Sr(NO3)2], Al(NO3)3, Ca(NO3)2, Ni(NO3)2, Cd(NO3)2, Zn(NO3)2, Hg(NO3)2, AgNO3, ZrO(NO3)2,
UO2(NO3)2, Th(NO3)2] or ammonium nitrate. a,b-Unsaturated aromatic carboxylic acids underwent nitro decarboxylation to afford b-nitro styrenes in
moderate to good yields, while a,b-unsaturated aliphatic carboxylic acids underwent decarboxylation to yield the corresponding nitro derivatives.
(Like I said, seems too good to be true) |