Synthesis of Highly Substituted Pyridines through Copper-Catalyzed Condensation of Oximes and α,β-Unsaturated Imines
作者:Wei Wen Tan、Yew Jin Ong、Naohiko Yoshikai
DOI:10.1002/anie.201704378
日期:2017.7.3
A copper-catalyzed condensation reaction of oxime acetates and α,β-unsaturated ketimines to give pyridine derivatives is reported. The reaction features mild conditions, high functional-group compatibility, and high regioselectivity with respect to unsymmetrical oxime acetates, thus allowing the preparation of a wide range of polysubstituted pyridines, many of which are not readily accessible by conventional
Herein an unprecedented iron(II)-catalyzed redox-neutral radical cascade reaction of [60]fullerene with γ,δ-unsaturated oxime esters is reported for the preparation of novel free (N–H) pyrrolidino[2′,3′:1,2]fullerenes. The transformation undergoes an intramolecular cyclization/intermolecular cyclization/oxidation/hydrolysis cascade, and features simple operation, broad substrate scope/high functional
n of unactivated olefins has been achieved with the stable and readily available AgSCF3 as the SCF3 source. A range of SCF3-substituted pyrrolines have been easily obtained under mild conditions in good yields via the present process. This method represents a facile and rapid access to valuable pyrrolines with fluorine-containing groups, and it is amenable to gram-scale synthesis.
reductive cross-coupling of unsaturated oxime esters with readily available arylhalides, providing an expedient approach for constructing pyrroline derivatives. The absence of organometallic reagents enables the reaction to occur under mild conditions with a broad substrate scope and good functional group tolerance. Moreover, other C-based electrophiles, including alkenyl, alkynyl and alkylhalides, or
在此,我们公开了通过镍催化的不饱和肟酯与容易获得的芳基卤化物的还原交叉偶联对烯烃进行一般且实用的亚氨基化,为构建吡咯啉衍生物提供了一种权宜之计。不存在有机金属试剂使反应能够在温和的条件下发生,具有广泛的底物范围和良好的官能团耐受性。此外,其他基于 C 的亲电子试剂,包括烯基、炔基和烷基卤化物或假卤化物,也是该反应的合适底物。