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Efficient enantioselective total synthesis of (-)-horsfiline

机译:(-)-horsfiline的高效对映选择性全合成

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摘要

A new efficient and concise enantioselective synthetic method for (-)-horsfiline is reported. (-)-Horsfiline could be obtained from diphenylmethyl tert-butyl malonate in 9 steps (32 %,>99 % ee) by using the enantioselective phase-transfer catalytic allylation (91 % ee) as the key step. This approach can be applied as a practical route for the large-scale synthesis of spirooxindole natural products, which enables a systematic investigation of their biological activity to be performed. Practical synthesis of a spirooxindole: The total synthesis of (-)-horsfiline was accomplished from diphenylmethyl tert-butylmalonate in nine steps (32 %, >99 % ee) by using a enantioselective phase-transfer catalytic allylation (91 % ee) as the key step (see scheme).
机译:报道了一种新的高效简明对映选择性合成方法。通过将对映选择性相转移催化烯丙基化(91%ee)作为关键步骤,可从9个步骤(32%,> 99%ee)从丙二酸二苯甲基叔丁酯中获得(-)-吗啉。该方法可作为螺环吲哚天然产物大规模合成的实用途径,从而能够对其生物活性进行系统的研究。螺氧杂吲哚的实际合成:使用对映选择性相转移催化烯丙基化反应(91%ee),通过九步(32%,> 99%ee)由二苯基甲基丙二酸叔丁基丙二酸酯完成(-)-霍斯菲林的总合成。关键步骤(请参阅方案)。

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