The key step in the synthesis is Wittig coupling of farnesyltriphenylphosphonium bromide (8) with ethyl 2-oxo-3-methyl butyrate (3). (3) was prepared by Grignard reaction of ethyl oxalate with iso-propylmagnesium bromide.
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释义
其中关键步骤是溴化法呢基三苯基?(8)和2-氧代-3-甲基丁酸乙酯(3)的Wittig反应。
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