A novel bifunctional organic sponge photocatalyst can enable the efficient coupling of tertiary amines with ketones in water. The asymmetric transformation can be also achieved by using this sponge photocatalyst.
tertiary amine and ketone components of 1‐carbonyl‐substituted anilines undergo [1,2] and [2,3] Stevens rearrangement reactions, triggered by a C4F9 radical, formed from electron donor–acceptor complexes. This approach enables the formation of a quaternary ammonium salt and thus a Stevens rearrangement to afford indolin‐3‐ones under mild conditions.
1-羰基取代的苯胺的叔胺和酮组分经历由电子供体-受体配合物形成的C 4 F 9自由基引发的[1,2]和[2,3] Stevens重排反应。这种方法可以形成季铵盐,从而进行史蒂文斯重排,从而在温和的条件下提供吲哚-3-酮。
Intramolecular Dehydrative Coupling of Tertiary Amines and Ketones Promoted by KO-<i>t</i>-Bu/DMF: A New Synthesis of Indole Derivatives
作者:Wen-tao Wei、Xue-jiao Dong、Shao-zhen Nie、Yan-yan Chen、Xue-jing Zhang、Ming Yan
DOI:10.1021/ol402908m
日期:2013.12.6
A new synthesis of indole derivatives has been achieved through intramolecular dehydrative coupling of tertiary amines and ketonespromoted by KO-t-Bu/DMF. The reaction probably proceeds via an α-amino alkyl radical pathway.
通过KO- t- Bu / DMF促进的叔胺和酮的分子内脱水偶联,实现了吲哚衍生物的新合成。该反应可能通过α-氨基烷基自由基途径进行。
Brønsted acid cocatalysis in photocatalytic intramolecular coupling of tertiary amines: efficient synthesis of 2-arylindols
作者:Xiaoqian Yuan、Xinxin Wu、Shupeng Dong、Guibing Wu、Jinxing Ye
DOI:10.1039/c6ob01239f
日期:——
We report herein a highly efficient intramolecular coupling reaction of tertiaryamines and ketones (α,β-unsaturated ketones) by using a Brønsted acid as a cocatalyst, affording 2-arylindols in good to excellent yields (up to 92%) under visible light irradiation at room temperature.
Intramolecular Functionalization of Benzylic Methylene Adjacent to the Ring Nitrogen Atom in <i>N</i>-Aryltetrahydroisoquinoline Derivatives
作者:Liu Yang、Daisy Zhang-Negrerie、Kang Zhao、Yunfei Du
DOI:10.1021/acs.joc.5b02443
日期:2016.4.15
adjacent to the ring nitrogen atom in a series of N-aryltetrahydroisoquinoline compounds has been realized through intramolecular cross-dehydrogenativecouplingreactions. The presented transformation provided straightforward access to the formation of C(sp3)–Y (Y = C, N or O) bond via I(III) reagent.