acetate in 58% yield by dilithium tetrachlorocuprate catalyzed cross-coupling with the Grignard reagent derived from n-octyl bromide; and reduction of both ester groups in the tosylate with lithium aluminum hydride to (S)-pentan-2-ol (yield 79%), followed by its esterification with (2Е)-2-methylpent-2-enoyl or (2Е)-2,4-dimethylpent-2-enoyl chloride with 68 and 69% yields, respectively.
摘要 (2 S )-
十三烷基
乙酸酯(果蝇的性信息素)和 (2 Е )-2-methylpent-2-enoic 和 (2 Е )-2,4-dimethylpent-2-的( S )-1-甲基丁酯烯酸(Rhyzopertha dominica小螟虫的聚集信息素的成分)由市售的 5-hexen-2-one(烯丙基
丙酮)合成,基于起始酮的总产率分别为 31.0、28.8 和 29.2%。该过程的关键步骤是 5-hexen-2-one 与Rhodococcus erythropolis А-25 放线菌的对映选择性
生物还原为 ( S )-5-hexen-2-ol,产率为 77% ( ее98.4%) 和以下
化学选择性反应:( S )-5-hexen-2-yl acetate 的
臭氧裂解,然后在 88 中用 NaBH 4将过氧产物还原为 ( S )-5-hydroxypent-2-yl acetate