A catalytic asymmetric version of the intramolecular ylide annulation has been developed which affords high ee values and diastereoselectivities and which further shows that spirobiindane-based chiral phosphines can be excellent organocatalysts. Both optically active benzobicyclo[4.3.0] compounds 2 and 2′ with three continuous stereogenic centers could be obtained as major products selectively under neutral and mild conditions just by a choice of an additive.

中文翻译：

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催化不对称分子级联反应的功能化苯并双环[4.3.0]骨架的建设。对映选择性的远程控制

已开发出分子内叶环过氧化物的催化不对称形式，其提供了高ee值和非对映选择性，并进一步表明基于螺双茚满的手性膦可能是优异的有机催化剂。只需选择一种添加剂，就可以在中性和温和条件下选择性地获得具有三个连续的立体异构中心的光学活性苯并双环[4.3.0]化合物2和2'作为主要产物。