Diastereoselective Synthesis of Densely Functionalized 3a,8a-Dihydro-8H-furo[3,2-a]pyrrolizines through One-Pot Three-Component Assembly

A new domino mode of assembly was discovered from the one-pot three-component reactions of pyrrole derivatives, active methylene compounds (malononitrile, methyl cyanoacetate, or ethyl cyanoacetate), and sodium cyanide in the presence of piperidinium acetate in EtOH at room temperature, leading to a novel tricyclic skeleton in excellent yield under mild and eco-friendly conditions. This well-choreographed domino process enabled formation of multiple bonds (three C-C and one C-O) for consecutive construction of two rings (pyrrolidine and dihydrofuran) in a diastereoselective manner.

Automated summary

The novel domino mode of assembly discovered in a one-pot three-component reaction under mild and eco-friendly conditions led to the synthesis of a new tricyclic skeleton, involving consecutive formation of multiple bonds and construction of two rings in a diastereoselective manner.