阿托醛缩醛的酸催化串联反应被建立用于合成三个重要分子,2,2-二取代 indolin-3-ones、萘并呋喃和芪。该合成是使用新的反应级联反应实现的,其中涉及相同的两个初始步骤:(i) S N 2' 取代,其中阿托醛充当亲电子试剂;(ii) 生成的苯乙醛类产物的碳-碳键的氧化裂解。与文献方法相比,本协议不仅避免使用昂贵的贵金属催化剂,而且操作简单。
Ionic liquids accelerating cycloaddition between 1-aryl-2-halocyclopropenes and furan
作者:May-Fan Ding、Shaw-Tao Lin、Woan-Ju Chang
DOI:10.3998/ark.5550190.0011.219
日期:——
with furan in a RTIL to give a fair good yield of the [4+2]-cycloadducts with more than 90% of the exo-isomer. The imidazolium type ionicliquids are able to accelerate this cycloaddition process with high steric selectivity. Neither pyrrole nor thiophene undergoes the cycloaddition with cyclopropene to form the [4+2]-cycloadduct. 1-Aryl-3,3-difluoro-2-halocyclopropenes are inert towards furan even
Spectroscopic Analysis of the Products of the Cycloaddition Reaction of 1-Aryl-2-chlorocyclopropenes and Cyclopentadiene
作者:Mei-Fang Ding、Chuan-Chen Lee、Lian-Chun Lin、Shaw-Tao Lin
DOI:10.1002/jccs.201300216
日期:2014.2
t‐BuOK at −10 °C produces the corresponding 1‐aryl‐2‐halocyclopropenes, which react with cyclopentadiene to produce fairly good yield of [4+2]‐cycloadditionproducts with more than 90% of the endo‐isomer. The higher yield obtained from hexane medium then from methanol and ionic liquid demonstrates that the reaction is a nonpolar process.
Nitrosylsulfuric acid in the synthesis of 5-chloroisoxazoles from 1,1-dichlorocyclopropanes
作者:Oksana B. Bondarenko、Zaur M. Garaev、Arseniy I. Komarov、Lyubov I. Kuznetsova、Svetlana V. Gutorova、Dmitry A. Skvortsov、Nikolai V. Zyk
DOI:10.1016/j.mencom.2019.07.021
日期:2019.7
Nitrosylsulfuric acid is shown to be a usable reagent for the synthesis of 5-chioroisoxazoles from readily available 1,1-dichlorocyclopropanes via nitrosation-heterocyclization reaction. A cytotoxicity of some of the prepared 5-chloroisoxazoles towards MCF7, A549, HEK293T and VA13 cell lines was evaluated.
Transformations of gem-dichloroarylcyclopropanes in the reaction with NOCl·2SO3. Synthesis of 3-aryl-5-chloroisoxazoles
作者:O. B. Bondarenko、A. Yu. Gavrilova、D. S. Murodov、N. S. Zefirov、N. V. Zyk
DOI:10.1134/s1070428013020024
日期:2013.2
Nitrosation with complex NOCl center dot 2SO(3) of gem-dichloroarylcyclopropanes containing acceptor substituents in the aromatic ring proceeded chemo- and regioselectively affording 3-aryl-5-chloroisoxazoles in high yields. The presence of donor substituents complicated the reaction by the occurrence of competing processes.
Lin, Shaw-Tao; Yao, Yi-Fen; Jih, Yuh-Fehng, Journal of Chemical Research, Miniprint, 1998, # 9, p. 2011 - 2024