TBN / O 2引发的THIQs相对惰性3,4-C–H键的氧化得以完成,其中α-磷酸酯基的存在对于实现双氧捕获和分子内HAT(CH活化)至关重要继电器CHAR),实现了高产量地合成一系列异喹啉-1-酮。机理研究证实3,4-双键的形成是由CHAR过程介导的。这项工作提供了一种实现远程C–H键激活的新策略。
The first oxidative C(sp3)–H phosphonylation of tertiary aliphatic amines has been developed. The use of cobalt acetate as a catalyst, N-hydroxyphthalimide as a cocatalyst, and air as an oxidant enabled the conversion of tertiary aromatic and aliphatic amines into α-aminophosphonates in moderate to excellent yields under mild conditions via a cross dehydrogenative couplingreaction.
The various α-aminophosphonates have been prepared from tertiary aromatic and aliphatic amines with P(O)H compounds via a tert-butyl hydroperoxide mediated cross-dehydrogenativecouplingreaction, eliminating the need for transition-metal catalysts. The oxidation of tertiary amine by tert-butyl hydroperoxide generates an iminium cation intermediate. A further addition of P(O)H compound to iminium cation
A metal‐ and reagent‐free, electrochemical cross‐dehydrogenative couplingreaction of N‐aryl‐tetrahydroisoquinolines with phosphites and indole was reported, providing an environmentally benign and simple approach for the construction of C–P and C–C.
CDC Reactions of N-Aryl Tetrahydroisoquinolines Using Catalytic Amounts of DDQ: CH Activation under Aerobic Conditions
作者:Kaliyamoorthy Alagiri、Pradeep Devadig、Kandikere R. Prabhu
DOI:10.1002/chem.201200100
日期:2012.4.23
coupling (CDC) reaction for the formation of CC and CP bonds is disclosed using a catalyticamount of DDQ (10 mol %) underaerobicconditions (see scheme). This unprecedented environmentally benign strategy of using AIBN (10 mol %) and molecular oxygen to regenerate DDQ exhibits a larger substrate scope. For the first time, an efficient utility of 4‐hydroxycoumarins as pronucleophiles for CDC is presented
Cobalt(II)/<i>N</i>-Hydroxyphthalimide-Catalyzed Cross-Dehydrogenative Coupling Reaction at Room Temperature under Aerobic Condition
作者:Mahendra R. Patil、Noopur P. Dedhia、Anant R. Kapdi、A.Vijay Kumar
DOI:10.1021/acs.joc.8b00203
日期:2018.4.20
This work reports a cobalt(II)/N-hydroxyphthalimide (NHPI)-catalyzed cross-dehydrogenative oxidative coupling of N-aryl tetrahydroisoquinolines with various pro-nucleophiles, such as indoles, nitroalkanes, and trialkylphosphites, active methylene compounds, and other nucleophiles, such as cyanide (ethyl cyanoformate), at room temperature under aerobic conditions. The present protocol is operationally