Transition Metal-Free α-C(<i>sp</i><sup>3</sup>)H Bond Functionalization of Amines by Oxidative Cross Dehydrogenative Coupling Reaction: Simple and Direct Access to C-4-Alkylated 3,4-Dihydroquinazoline Derivatives
A transitionmetal-freecatalyticsystem has been developed for the cross dehydrogenative coupling of amines with nitroalkanes under mild condition employing potassium iodide/tert-butyl hydrogen peroxide catalyticsystem. This methodology was further extended for the construction of biologically important N-heterocycles, namely, 3,4-dihydroquinazoline derivatives. This novel strategy provides a simple
In this communication we describe the oxidativeCCbondformation of tertiary amines with various nucleophiles under very mild and environmental friendly conditions by using mesoporous graphitic carbon nitride (mpg‐C3N4) semiconductor as a heterogeneous, metal‐free photosensitizer in combination with visiblelight and oxygen as the terminal oxidation agent. This system can be further combined with
在本通讯中,我们通过使用介孔石墨碳氮化碳(mpg-C 3 N 4)半导体作为非均相,无金属的光敏剂组合,描述了在非常温和且环境友好的条件下叔胺与各种亲核试剂的氧化CC键形成用可见光和氧气作为终端氧化剂。该系统可以进一步与脯氨酸-有机催化结合使用,以实现氧化串联光催化,这证明了当前光合作用系统的丰富化学可能性。
Photo‐induced sp
<sup>3</sup>
C−H bond arylation, cyanation and nitroalkylation of tetrahydroisoquinolines (THIQs) under visible light irradiation using a combination of NHPI and Rose Bengal
作者:Mahendra R. Patil、Jagrut Shah、A. Vijay Kumar、Anant R. Kapdi
DOI:10.1002/asia.202000999
日期:2020.12.14
sustainable protocol for α‐arylation of tetrahydroisoquinolines (THIQs) with aryl diazonium salts using a combination of a cheap and stable oxidant, N‐hydroxyphthalimide (NHPI), and an inexpensive dye photosensitizer, RoseBengal (RB), for the first time. The reaction was performed at ambient temperature using green LED lightirradiationunder an oxygen atmosphere. The developed α‐arylation protocol shows a