dimethyl (3R,4R)-4-methoxy-3-methyl-2-oxo-7-(triethylsilyloxyheptyl)phosphonate 、
(2R,3S)-3-methoxy-2-methyl-4-[(3S,5S,9S,11R,12E,14E,17S,23S,25S,29S,31R,32E,34E,37S)-3,9,23,29-tetrakis[[tert-butyl(dimethyl)silyl]oxy]-11,17,31,37-tetramethoxy-25-[(2S,3R)-2-methoxy-3-methyl-4-oxobutyl]-4,4,24,24-tetramethyl-7,27-dioxo-6,20,26,40-tetraoxa-41,42-diazatricyclo[36.2.1.118,21]dotetraconta-1(41),12,14,18,21(42),32,34,38-octaen-5-yl]butanal 在
barium hydroxide octahydrate 作用下,
以
四氢呋喃 、
水 为溶剂,
反应 2.0h,
以95%的产率得到(3S,5S,9S,11R,12E,14E,17S,23S,25S,29S,31R,32E,34E,37S)-3,9,23,29-tetrakis[[tert-butyl(dimethyl)silyl]oxy]-5,25-bis[(E,2S,3S,7R,8R)-2,8-dimethoxy-3,7-dimethyl-6-oxo-11-triethylsilyloxyundec-4-enyl]-11,17,31,37-tetramethoxy-4,4,24,24-tetramethyl-6,20,26,40-tetraoxa-41,42-diazatricyclo[36.2.1.118,21]dotetraconta-1(41),12,14,18,21(42),32,34,38-octaene-7,27-dione