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。