Improved Stereoselective Synthesis of Optically Active Methylene Lactone, Key Intermediate for the Synthesis of 1,2-Oxidized Furofuran Lignan, by Direct α-Methylenation to Butanolide

抄録

  (3R)-3-[(1R)-1-(tert-Butyldimethylsilyl)oxy-1-(2-methoxy-4,5-methylenedioxyphenyl)methyl]-2-methylene-4-butanolide, which is a key intermediate for the synthesis of 1,2-oxidized furofuran lignan, was stereoselectively synthesized from L-glutamic acid by applying direct methylenation to butanolide.