Abstract

The enantioselective synthesis of (S)-(−)-spirobrassinin, which features a unique sulfur-containing spirooxindole skeleton, was achieved by focusing on the phytoalexin generation in Brassicaceae plants. Specifically, (S)-(−)-spirobrassinin was obtained in a one-pot fashion from l-tryptophan through a reaction involving S-spirocyclization with various turnip enzymes and constituents, i.e., using the turnip as a reaction reagent, catalyst, and reaction vessel. Surprisingly, this strategy also enabled the one-pot enantioselective synthesis of the novel non-natural spirooxindole (S)-(−)-5-methylspirobrassinin from 5-methyl-dl-tryptophan.

Graphic abstract

中文翻译：

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使用萝卜酶从氨基酸一锅对映选择性合成（S）-spirobrassinin和非天然（S）-methylspirobrassinin

摘要

通过着重于十字花科植物中植物抗毒素的产生，实现了具有独特的含硫螺氧杂吲哚骨架的（S）-（-）-spirobrassinin的对映选择性合成。具体地，通过涉及与各种萝卜酶和成分的S-螺环化的反应，即使用萝卜作为反应试剂，催化剂和方法，以1-锅方式从1-色氨酸以单锅方式获得（S）-（-）-螺油菜素。反应容器。令人惊讶地，这种策略也使新的非天然spirooxindole（的一锅对映选择性合成小号） - （ - ） -从5-甲基-5- methylspirobrassinin DL色氨酸。

图形摘要