Herein we report an effective and simple preparation method of substituted azoxybenzenes by reductive dimerization of nitrosobenzenes. This procedure requires no additional catalyst/reagent and can be applied to substrates with a wide range of substitution patterns.
A rhodium-catalyzed annulative reaction between azobenzenes and nitrosoarenes has been developed, leading to a series of phenazines in moderate to good yields. This procedure proceeds with sequential chelation-assisted addition of aryl C–H to nitrosoarenes and ring closure by electrophilic attack of azo group to aryl. During this transformation, the azo group served as not only a traceless directing
Enantioselective Oxidative Coupling of β-Ketocarbonyls and Anilines by Joint Chiral Primary Amine and Selenium Catalysis
作者:Wanting Chen、Yanni Wang、Xueling Mi、Sanzhong Luo
DOI:10.1021/acs.orglett.9b02636
日期:2019.10.18
An enantioselective primary amine-catalyzed total N-selective nitroso aldol reaction (N-NA) was achieved through the oxidation of primary aromatic amines to the corresponding nitrosoarenes catalyzed by selenium reagents and 30% H2O2. This protocol provides a facile and highly efficient access to α-hydroxyamino carbonyls bearing chiral quaternary centers under exceedingly mild and green reaction conditions
通过硒试剂和30%H 2 O 2催化伯芳族胺氧化为相应的亚硝基芳烃,可实现对映选择性伯胺催化的总N选择性亚硝基醛醇缩合反应(N -NA)。该方案可在极其温和和绿色的反应条件下,通过高度化学和对映体控制,轻松而高效地接近带有手性季中心的α-羟氨基羰基。
Substrate‐Controlled Divergent Synthesis of Enaminones and Pyrroles from Indolizines and Nitroso Compounds
作者:María José González‐Soria、Francisco Alonso
DOI:10.1002/adsc.201900837
日期:2019.11.5
temperature without any catalyst. Moreover, both types of products can be obtained in onepotfrom commercial materials as well as at a gram scale. It is worthy of note that the regioselectivity of the β‐enaminones is inaccessible by the standard literature methods and their utility has been exemplified in the synthesis of diverse heterocycles. We have made every endeavor to put forward the corresponding
Photoinduced Diverse Reactivity of Diazo Compounds with Nitrosoarenes
作者:Sourav Roy、Gourav Kumar、Indranil Chatterjee
DOI:10.1021/acs.orglett.1c02279
日期:2021.9.3
A diverse reactivity of diazo compounds with nitrosoarene in an oxygen-transfer process and a formal [2 + 2] cycloaddition is reported. Nitosoarene has been exploited as a mild oxygen source to oxidize an in situ generated carbene intermediate under visible-light irradiation. UV-light-mediated in situ generated ketenes react with nitosoarenes to deliver oxazetidine derivatives. These operationally