TetraPh-Tol-BITIOPO: a new atropisomeric 3,3′-bithiophene based phosphine oxide as an organocatalyst in Lewis base-catalyzed Lewis acid mediated reactions
作者:Abbinante Vincenzo Mirco、Benaglia Maurizio、Rossi Sergio、Benincori Tiziana、Cirilli Roberto、Pierini Marco
DOI:10.1039/c9ob01297d
日期:——
catalyst was able to promote the allylation of aldehydes with allyltrichlorosilane in up to 98% yield and up to 96% enantiomeric excess (ee), and the direct aldol reaction to afford β-hydroxy ketones and β-hydroxy thioesters, with good chemical yields and modest stereochemical efficiency. Computational studies helped to elucidate and to rationalize the stereochemical outcome of the reactions catalyzed
Silver-Mediated Oxidative C–H/P–H Functionalization: An Efficient Route for the Synthesis of Benzo[<i>b</i>]phosphole Oxides
作者:Yun-Rong Chen、Wei-Liang Duan
DOI:10.1021/ja407373g
日期:2013.11.13
A Ag-mediated C-H/P-H functionalization reaction of arylphosphine oxides with internal alkynes was described for the direct preparation of benzo[b]phosphole oxides with a high yield. An unusual aryl migration on the P-atom derived from a C-P bond cleavage and a new C-P bond formation was also observed and demonstrated to proceed via the radical process.
描述了芳基氧化膦与内部炔烃的 Ag 介导的 CH/PH 官能化反应,用于以高产率直接制备苯并 [b] 磷氧化物。还观察到来自 CP 键断裂和新 CP 键形成的 P 原子上不寻常的芳基迁移,并证明是通过自由基过程进行的。
Enantioselective Double Aldol Reaction Catalyzed by Chiral Phosphine Oxide
Goes on twice! The first enantioselectivedouble aldol reaction is described (see scheme; R1=aryl, alkyl, alkenyl; R2=aryl, alkenyl). A combination of readily available chiral phosphine oxide and silicon tetrachloride as reagents enables the unique transformation, which gives the double aldol adducts in high yields and selectivities.
继续两次!描述了第一对映选择性双羟醛反应(参见方案; R 1=芳基,烷基,烯基; R 2=芳基,烯基)。易于获得的手性氧化膦与四氯化硅的组合使用可实现独特的转化,从而以高收率和选择性获得双羟醛加合物。
Spiro[4,4]-1,6-Nonadiene-Based Diphosphine Oxides in Lewis Base Catalyzed Asymmetric Double-Aldol Reactions
Symmetry swap: A C2‐chiral spiro diphosphine oxide (SpinPO) has been found to be highly efficient and enantioselective in the catalysis of double‐aldol reactions of ketones and aldehydes to give the corresponding optically active double‐aldol products, which can be readily transformed into optically active C3‐ and pseudo‐C3‐symmetric molecules.