Based on the reactive behavior of different transition-metal
catalysts, three methods for the synthesis of highly functionalized
polysubstituted furan derivatives are presented: (i) copper(I) iodide
catalyzed regiospecific synthesis of furan aldehydes/ketones from
alkynols and diethyl but-2-ynedioate under atmospheric pressure;
(ii) nano-Cu2O-catalyzed domino process for the regioselective
synthesis of α-carbonylfurans from readily accessible starting materials;
(iii) silver-catalyzed one-pot cyclization in toluene at 50 ˚C
for the synthesis of furan derivatives. It was notably that all
the domino reactions were smooth under mild conditions with commercially
available catalysts, and afforded highly functionalized furans in
moderate to good yields. As we know, furans derivatives are extremely
useful organic molecules used as synthetic building blocks for the
synthesis of more elaborate heterocyclic compounds.
transition-metal-catalyzed domino reaction - functionalized
polysubstituted furan - copper(I) iodide - nano-Cu2O - silver(I) acetate