(2R,3S,4R,5S,6S)-2-{(1S,2R)-1-[(tert-butyl-dimethyl-silanyl)-ethynyl]-2-methyl-pent-3-ynyloxy}-3,4-bis-(tert-butyl-dimethyl-silanyloxy)-5-methoxy-6-methyl-tetrahydro-pyran 、
(2E,4E)-5-bromo-2,4-dimethyl-penta-2,4-dienoic acid methyl ester 在
四(三苯基膦)钯 甲醇 、 diisopinocamphenylboron chloride 、
thallium (I) ethoxide 作用下,
以
四氢呋喃 、
水 为溶剂,
反应 2.17h,
以83%的产率得到(2E,4E,6E)-(8R,9S)-9-[(2R,3S,4R,5S,6S)-3,4-bis(tert-butyl-dimethyl-silanyloxy)-5-methoxy-6-methyl-tetrahydro-pyran-2-yloxy]-11-(tert-butyl-dimethyl-silanyl)-2,4,6,8-tetramethyl-undeca-2,4,6-trien-10-ynoic acid methyl ester