(5R,6R,7R)-5-O-<2'-deoxy-3',4'-di-O-(dimethylisopropylsilyl)-α-L-fucopyranosyl>-6-ethyl-7-O-(diethylisopropylsilyl)-5,7-dihydroxy-3-octanone 、
(7S,8S,15S,16S)-(3E,5E,11E,13E)-8,16-bis<(1'R)-1'-formylethyl>-7,15-dimethyl-1,9-dioxacyclohexadeca-3,5,11,13-tetraene-2,10-dione 在
N-Ethyl-1,2-dihydropyridin 、 tin(II) trifluoromethanesulfonate 作用下,
以
二氯甲烷 为溶剂,
以6.5%的产率得到(7S,8S,15S,16S:3E,5E,11E,13E)-8,16-bis<(1S,2R,3S,6R,7R,8R)-6-O-<2-deoxy-3,4-bis-O-(isopropyldimethylsilyl)-α-L-fucosyl>-7-ethyl-8-O-(diethylisopropylsilyl)-2,6,8-trihydroxy-1,3-dimethyl-4-oxononyl>-7,15-dimethyl-1,9-dioxa-3,5,11,13-cyclohexadeca...