Enantioselective synthesis of spirocyclic cyclopentenes: asymmetric [3+2] annulation of 2-arylideneindane-1,3-diones with MBH carbonates derivatives catalyzed by multifunctional thiourea–phosphines
作者:Fangle Hu、Yin Wei、Min Shi
DOI:10.1016/j.tet.2012.07.013
日期:2012.9
The [3+2] annulation reactions of 2-arylideneindane-1,3-diones with Morita–Baylis–Hillman (MBH) carbonates proceeded smoothly in the presence of multifunctional thiourea–phosphines to produce the corresponding quaternary carbon centered spirocyclic cyclopentenes in moderate yields, with high diastereoselectivities and enantioselectivities under mild conditions. The plausible reaction has been also
在多功能硫脲-膦的存在下,2-芳基亚乙基-1,3-二酮与Morita–Baylis–Hillman(MBH)碳酸盐的[3 + 2]环化反应顺利进行,从而以中等收率产生了相应的季碳中心的螺环式环戊烯在温和条件下具有较高的非对映选择性和对映选择性。在先前的文献基础上,也对合理的反应进行了讨论。