site‐selective α‐functionalization of sulfonylamide derivatives through the in‐situ generation of imine intermediates. The N−F sulfonylamides, which could facilitate the elimination to generate imines, are coupled with TBACN to efficiently and mildly afford α‐amino cyanides. Comparing with Strecker reaction, this transformation offers a complementary strategy to efficiently construct α‐amino cyanides
The catalyticC(sp3)-H functionalization is highly desirable yet challenging in organic synthesis. Incorporation of the SP(O)(OR)2 group through C(sp3)-H functionalization remains unexplored. We herein report an unprecedented protocol for phosphorothiolation of primary and secondary C(sp3)-H via a multicomponent reaction with N-fluoro-substituted amides, elemental sulfur, and P(O)H compounds involving
作者:Xia Hu、Guoting Zhang、Faxiang Bu、Lei Nie、Aiwen Lei
DOI:10.1021/acscatal.8b02847
日期:2018.10.5
The cross-coupling of C(sp3)–H and N–H represents one of the most straightforward approaches to construct saturated nitrogen-containing compounds. The additional oxidants or halogenated reagents are generally required in such processes. Herein, we developed an electrochemical oxidative intramolecularC(sp3)–Hamination of amides by employing a carbon rod anode and a platinum plate cathode in an undivided
Chiral Piperidines from Acyclic Amines via Enantioselective, Radical-Mediated δ C–H Cyanation
作者:Zuxiao Zhang、Xin Zhang、David A. Nagib
DOI:10.1016/j.chempr.2019.09.010
日期:2019.12
heterocycle. The catalytic, regio-, and enantioselective δ C–H cyanation of acyclic amines described here, incorporates a carbonyl equivalent selectively at the δ position. This δ C–H cyanation is enabled by a chiral Cu catalyst, which both initiates and terminates intramolecular hydrogen atom transfer (HAT) by an N-centered radical relay mechanism. The broad scope and utility of this highly enantioselective
Visible-Light-Promoted Remote C(sp<sup>3</sup>)–H Amidation and Chlorination
作者:Qixue Qin、Shouyun Yu
DOI:10.1021/acs.orglett.5b00582
日期:2015.4.17
A visible-light-promoted C(sp(3))-H amidation and chlorination of N-chlorosulfonamides (NCSs) is reported. This remote C(sp(3))-H functionalization can be achieved in weak basic solution at room temperature with as little as 0.1 mol % of a photocatalyst. A variety of nitrogen-containing heterocycles (up to 94% yield) and chlorides (up to 93% yield) are prepared from NCSs. Late-stage C(sp3)H functionalization of complex and biologically important (-)-cis-myrtanylamine and (+)-dehydroabietylamine derivatives can also be achieved with excellent yields and regioselectivity.