(+/-)-(2R*,3R*)-2-Ethyl-6-methoxy-3-(3,4-methylenedioxyphenyl)-1,4-benzodioxan-7-carbaldehyde 在
lithium diisopropyl amide 作用下,
生成 (+/-)-(3S*,4R*)-3-<(1'R*/S*)-1-<(2''R*,3''R*)/(2''S*,3''S*)-2''-Ethyl-6-methoxy-3''-(3,4-methylenedioxyphenyl)-1,4-benzodioxan-7-yl>-1'-<(tert-butyldimethylsilyl)oxy>methyl>-4-vinyldihydro-2(3H)-furanone