dimethyl lithiomethylphosphonate 、
(E)-(2R,4S,5S,6S)-9-(1-ethoxyethoxy)-5-hydroxy-2,4,6-trimethyl-7-nonenecarboxylic acid γ-lactone 以
四氢呋喃 为溶剂,
以77%的产率得到dimethyl (((3R,5S,6S)-6-((2R,E)-5-(1-ethoxyethoxy)pent-3-en-2-yl)-2-hydroxy-3,5-dimethyltetrahydro-2H-pyran-2-yl)methyl)phosphonate