Asymmetric Addition of Arylboronic Acids to Cumulene Derivatives Catalyzed by Axially Chiral N-Heterocyclic Carbene-Pd2+ Complexes
作者:Zhen Liu、Peng Gu、Min Shi
DOI:10.1002/chem.201100703
日期:2011.5.16
Cumulene+carbene=chirality! Asymmetric additions of boronic acids to cumulene derivatives, catalyzed by an N‐heterocyclic carbene–palladium complex, provide the desired allenic products in good to excellent yields and moderate to good enantioselectivities. These optically active allenic adducts can be further transformed to useful chiral products in good yields and with an intact chirality (see scheme)
异丙苯+卡宾=手性!N杂环卡宾-钯络合物催化将硼酸不对称地添加到异丙苯衍生物中,可提供所需的烯丙基产物,其收率良好至优异,对映选择性中等至良好。这些光学活性的烯丙基加合物可以以高收率和完整的手性被进一步转化为有用的手性产物(参见方案)。