在这项研究中,描述了一种基于Mn I / Ag I的中继催化过程,用于通过正式的[3 + 2]和[4 + 2]环加成反应级联来单锅合成多环产物。锰(I)配合物催化了与丙二烯直接进行CH烯丙基化的第一个例子,为银(I)催化原位Povarov环化奠定了基础。该反应以高键形成效率(三个C键),广泛的底物范围,高的区域和立体选择性以及100%的原子经济性进行。
The reactions of arylhalides with 2,3,3-trimethyl-4-penten-2-ol in the presence of a palladium catalyst result in prenyl transfer from the alcohol to arylhalidesvia retro-allylation, yielding prenylarenes. Other multisubstituted allyl groups such as the 2,3-dimethyl-2-butenyl group are introduced to aromatic rings.
Anti-Inflammatory and Anti-Allergy Extracts from Nettle
申请人:Alberte Randall S.
公开号:US20100009927A1
公开(公告)日:2010-01-14
The present invention relates in part to nettle extracts that are useful for treating or preventing seasonal allergies, allergic rhinitis, and other inflammatory conditions.