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
Phosphazene-catalyzed desymmetrization of cyclohexadienones by dithiane addition
作者:Matthew A Horwitz、Elisabetta Massolo、Jeffrey S Johnson
DOI:10.3762/bjoc.13.75
日期:——
We report a desymmetrization of cyclohexadienones by intramolecular conjugateaddition of a tethered dithiane nucleophile. Mild reaction conditions allow the formation of diversely functionalized fused bicyclic lactones. The products participate in facially selective additionsfrom the convex surface, leading to allylic alcohol derivatives.
Site-selective 1,3-double functionalization of arenes using <i>para</i>-quinol, C–N, and C–C/C–P three-component coupling
作者:Saddam Husen、Anil Chauhan、Ravindra Kumar
DOI:10.1039/c9gc04103f
日期:——
A catalytic and site-selective approach has been demonstrated for dual functionalization of arenes via cross-coupling reactions of p-quinols with amines and isocyanides/phosphites.
Quinone Alkylation Using Organocadmium Reagents: A General Synthesis of Quinols
作者:Aaron Aponick、Jason D. McKinley、Jeffrey C. Raber、Carl T. Wigal
DOI:10.1021/jo972300d
日期:1998.4.1
Reactions of p-benzoquinone with organocadmiumreagents yield quinols, the result of quinone carbonyl monoalkylation. The reactions proceed in good yield and are devoid of bisaddition and hydroquinone byproducts. Quinone alkylations using this method show general applicability to p-benzoquinone as well as extended quinone systems using primary alkyl, secondary alkyl, and aryl reagents.
Iodine-catalyzed regioselective C-3 arylation of indoles with p-quinols
作者:Neha Dua、Rama Krishna Peddinti
DOI:10.1007/s12039-020-1742-2
日期:2020.12
highly convenient strategy for the C-3 arylation of indoles with p-quinols is presented. The present work surpasses in forming a C–C bond at the meta-position of the phenols, which is traditionally challenging to functionalize. This protocol further leads the way to have ascendable, forthright access to phenol-assimilated heterocycles which have powerful applications both in synthetic and medicinal chemistry