Catalyst-Controlled Inverse-Electron-Demand Hetero-Diels−Alder Reactions in the Enantio- and Diastereoselective Synthesis of Iridoid Natural Products
作者:David E. Chavez、Eric N. Jacobsen
DOI:10.1021/ol034883l
日期:2003.7.1
[reaction: see text] Iridoid naturalproducts 1-4 are accessed stereoselectively by means of tridentate (Schiff base)Cr(III)-catalyzed hetero-Diels-Alderreactions between ethyl vinyl ether and enantioenriched 5-methyl-1-cyclopentene-1-carboxaldehyde. An efficient route to the aldehyde from citronellal is afforded by the ring-closing metathesis reaction.