Chlorination Reaction of Aromatic Compounds and Unsaturated Carbon–Carbon Bonds with Chlorine on Demand
作者:Feng Liu、Na Wu、Xu Cheng
DOI:10.1021/acs.orglett.1c00704
日期:2021.4.16
electrochemical transformation and the high reactivity of chlorine. By utilizing Cl3CCN as the chloride source, donating up to all three chloride atom, the reaction could generate and consume the chlorine in situ on demand to achieve the chlorination of aromaticcompounds and electrodeficient alkenes.
Metal-free late-stage C(sp<sup>2</sup>)–H functionalization of<i>N</i>-aryl amines with various sodium salts
作者:Chandrashekar Mudithanapelli、Mi-hyun Kim
DOI:10.1039/c9ob02217a
日期:——
Metal-free consecutive C(sp2)–X (X = Cl, Br, S, N) bond formations of N-aryl amines (cyclic, fused, carbamate, and aminium radicals) were achieved under mild conditions using [bis(trifluoroacetoxy)iodo]benzene (PIFA) and simple nonharmful sodium salts. This direct and selective C(sp2)–H functionalization showed excellent functional group compatibility, cost effectiveness, and late-stage applicability
不含金属的连续的C(SP 2)-X(X =氯,溴,S,N)的键形成ñ -芳基胺(环状,稠合,氨基甲酸酯,和铵基团)使用[双温和的条件下实现(三氟乙酰氧基)碘]苯(PIFA)和简单的无害钠盐。这种直接和选择性的C(sp 2)–H官能化显示出优异的官能团相容性,成本效益和生物活性天然产物合成的后期适用性。提出了两种机制来解释邻位或对位偏爱以及CH 3 NO 2的加速作用。
Amine organocatalysts for highly <i>ortho</i>-selective chlorination of anilines with sulfuryl chloride
A metal catalyst free approach for regioselective ortho-chlorination of anilines has been developed using a secondary amine as the organocatalyst and sulfuryl chloride as the halogen source under mild conditions. A wide range of substrates were compatible with this catalytic system. In addition, this catalytic protocol has been applied to the efficient synthesis of bioactive compounds and modification
A catalyst-free N-benzyloxycarbonylation of amines in aqueous micellar media at room temperature
作者:Janhavi J. Shrikhande、Manoj B. Gawande、Radha V. Jayaram
DOI:10.1016/j.tetlet.2008.05.010
日期:2008.8
N-Benzyloxycarbonylation of amines was carried out in aqueous micellar media. Aliphatic (open and cyclic), aromatic and heteroaromatic amines react with Cbz-Cl to give excellent yields of products. The reactions were carried out in water and at room temperature. (C) 2008 Elsevier Ltd. All rights reserved.
A facile protocol for N-Cbz protection of amines in PEG-600
作者:Chun Lin Zhang、Dong Feng Zhang、Hong Yi Zhao、Zi Yun Lin、Hai Hong Huang
DOI:10.1016/j.cclet.2012.05.012
日期:2012.7
An efficient and eco-friendly protocol for the chemoselective N-benzyloxycarbonylation of amines was described. The reaction of amines with benzyl chloroformate (Cbz-Cl) in the presence of PEG-600 at room temperature afforded the corresponding N-Cbz derivatives in excellent yields. The method is applicable to the N-Cbz protection of aliphatic (acyclic and cyclic) and aromatic amines. (C) 2012 Hai Hong Huang. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.