Atroposelective [2+2+2] cycloadditions catalyzed by a rhodium(i)–chiral phosphate system
作者:Mylène Augé、Marion Barbazanges、Anh Tuan Tran、Antoine Simonneau、Paulin Elley、Hani Amouri、Corinne Aubert、Louis Fensterbank、Vincent Gandon、Max Malacria、Jamal Moussa、Cyril Ollivier
DOI:10.1039/c3cc43188f
日期:——
cationic Rh(I)-catalyzed [2+2+2] cycloaddition reactions between diynes and isocyanates relying on the chiral anion strategy have been devised. In the presence of [Rh(cod)Cl]2, 1,4-bis(diphenylphosphino)butane, and the silver phosphate salt Ag(S)-TRIP as the unique source of chirality, axially chiral pyridones were isolated with ees up to 82%. This approach is novel in the field of chiral anion-mediated
依靠手性阴离子策略,设计了二炔与异氰酸酯之间的对映选择性阳离子Rh(I)催化的[2 + 2 + 2]环加成反应。在[Rh(cod)Cl] 2、1,4-双(二苯基膦基)丁烷和磷酸银盐Ag(S)-TRIP作为唯一手性来源的情况下,分离出轴向手性吡啶酮,直到82%。该方法在手性阴离子介导的不对称催化领域中是新颖的,因为迄今为止对映选择性的转化仍然是空前的。它也被证明是对基于手性L型配体的经典策略的补充。