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期刊论文
A Flexible Approach to (S)-5-Alkyl Tetramic Acid Derivatives: Application to the Asymmetric Synthesis of (+)-Preussin and Protected (3S,4S)-AHPPA
Lett., Vol. 5, No. 23, 2003，-0001，（）：
A flexible asymmetric approach to 5-alkyl tetramic acid derivatives is described, which is based on the use of 9 as the first synthetic equivalent to chiral nonracemic tetramic acid 5-carbanionic synthon 9b. The existence of the carbanion intermediate 9b was proven by trapping with trimethylchlorosilane. Application of the present method to the synthesis of antifungal alkaloid (+)-preussin, as well as protected (3S,4S)-AHPPA 6, is also described.
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