Redox-neutral functionalization of α-Csp<sup>3</sup>–H bonds of secondary cyclic amines: a highly atom-economical strategy for <i>N</i>-arylation/formal cross-dehydrogenative couplings
作者:Priyankar Jha、Saddam Husen、Ravindra Kumar
DOI:10.1039/d0gc04258g
日期:——
An efficient redox-neutral method has been developed for α-Csp3–H functionalization of secondary cyclic amines via concurrent N-arylation/formal cross dehydrogenation coupling (CDC) with sp2-C–H and sp3-C–H bonds of arenes and ketones, respectively. The developed protocol is operationally simple, highly atom economical and environmentally benign (E-factor = ca. 0.5). The reaction mechanism has been
Dehydrogenative C(sp<sup>3</sup>)–H bond functionalization of tetrahydroisoquinolines mediated by organic oxidants under mild conditions
作者:Zdravko Džambaski、Bojan P. Bondžić
DOI:10.1039/c9ob01090d
日期:——
The organocatalyzed Mannich reaction of unsubstituted and N-aryl-substituted tetrahydroisoquinolines (THIQs) and the Strecker reaction of several N-aryl-substituted THIQs through dehydrogenative C(sp3)-H bond functionalization (cross-dehydrogenative coupling) promoted by organic single electron oxidants DDQ and IBX are presented. The C-H oxidation/Mannich reaction of less reactive N-aryl substituted
Diversification of Unprotected Alicyclic Amines by C−H Bond Functionalization: Decarboxylative Alkylation of Transient Imines
作者:Anirudra Paul、Jae Hyun Kim、Scott D. Daniel、Daniel Seidel
DOI:10.1002/anie.202011641
日期:2021.1.18
efforts by many practitioners in the field, methods for the direct α‐C−H bond functionalization of unprotected alicyclic amines remain rare. A new advance in this area utilizes N‐lithiated alicyclic amines. These readily accessible intermediates are converted to transient imines through the action of a simple ketone oxidant, followed by alkylation with a β‐ketoacid under mild conditions to provide valuable