摘要:
A novel cytotoxic butenolide alkaloid, uncinine, has been synthesized for the first time in 8 steps from propargyl alcohol. The sequence features a mild and efficient tandem carbonylative lactonization of a beta-iodoenone precursor using an inorganic base at 1 atm CO, and an indirect attachment of the pyrrolidinone ring via nucleophilic substitution with methyl gamma-aminobutyrate. (c) 2005 Elsevier Ltd. All rights reserved.