site-selective δ-C(sp3)-Hbondsactivation of aliphatic sulfonamides for constructing the synthetically useful seven-membered N-heterocycles. A key to success is the use of in-situ-formed amide radicals, to activate the inert C(sp3)-H bond, and inexpensive TMSNCO, as a coupling reagent under mild conditions. To the best of our knowledge, this represents the first use of alkylamine derivatives as a five-membered
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
Compounds of the present invention, and pharmaceutically acceptable compositions thereof, are useful as modulators of ATP-Binding Cassette (“ABC”) transporters or fragments thereof, including Cystic Fibrosis Transmembrane Conductance Regulator (“CFTR”). The present invention also relates to methods of treating ABC transporter mediated diseases using compounds of the present invention.
作者:Jia-Wen Yang、Guang-Qiang Tan、Kai-Cheng Liang、Ke-Dong Xu、Ma Su、Feng Liu
DOI:10.1021/acs.orglett.2c03135
日期:2022.10.28
synthesis of structurally diverse alkene/alkyne-containing azepanes. The reaction features selective functionalization of distal unactivatedC(sp3)–H bonds and a broad substrate scope, thus allowing the late-stage modification of pharmaceuticals and natural products. A radical mechanism involving 1,5-hydrogen atom transfer of N-radicals, facile coupling of alkyl radicals with 1,3-dienes/1,3-enynes, and