Synthesis of Furo[3,4-<i>c</i>]furans Using a Rhodium(II)-Catalyzed Cyclization/Diels−Alder Cycloaddition Sequence
作者:Albert Padwa、Christopher S. Straub
DOI:10.1021/jo020413d
日期:2003.1.1
acetate, afforded furo[3,4-c]furans in good yield. The reaction proceeds by addition of a rhodium-stabilized carbenoid onto the acetylenic pi-bond to give a vinyl carbenoid that subsequently cyclizes onto the neighboring carbonyl group to produce the furan ring. These furo[3,4-c]furans react with various dienophiles, furnishing anisole derivatives derived by loss of water from the initially formed Diels-Alder