Gold(I)‐Assisted α‐Allylation of Enals and Enones with Alcohols
作者:Marco Michele Mastandrea、Niall Mellonie、Pietro Giacinto、Alba Collado、Steven P. Nolan、Gian Pietro Miscione、Andrea Bottoni、Marco Bandini
DOI:10.1002/anie.201507218
日期:2015.12
intermolecular α‐allylation of enals and enones occurs by the condensation of variously substituted allenamides with allylic alcohols. Cooperative catalysis by [Au(ItBu)NTf2] and AgNTf2 enables the synthesis of a range of densely functionalized α‐allylated enals, enones, and acyl silanes in good yield under mild reaction conditions. DFT calculations support the role of an α‐gold(I) enal/enone as the active
烯丙基和烯酮的分子间α-烯丙基化是通过各种取代的烯丙基酰胺与烯丙基醇的缩合发生的。[Au(I t Bu)NTf 2 ]和AgNTf 2的协同催化能够在温和的反应条件下以高收率合成一系列高密度官能化的α-烯丙基化的烯醛,烯酮和酰基硅烷。DFT计算支持α-金(I)烯醛/烯酮作为活性亲核物质的作用。
Synthesis of Polysubstituted Quinolines via Transition-Metal-Free Oxidative Cycloisomerization of <i>o</i>-Cinnamylanilines
作者:Mohammad Rehan、Gurupada Hazra、Prasanta Ghorai
DOI:10.1021/acs.orglett.5b00419
日期:2015.4.3
An efficient synthesis of 2-aryl 4-substituted quinolines from stable and readily available o-cinnamylanilines, prepared from anilines and cinnamylalcohols, has been developed. The reaction occurred via a regioselective 6-endo-trig intramolecular oxidative cyclization using (KOBu)-Bu-t as a mediator and DMSO as an oxidant at rt. The reaction showed a broad substrate scope with good to excellent yields.