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.
Synthesis of
<i>gem</i>
‐Dichlorocyclopropanes Using Liquid–Liquid Slug Flow
作者:Jong Won Lee、Yea Seul Jang、Jong Min Park、Chan Pil Park
DOI:10.1002/bkcs.12346
日期:2021.8
causes of precipitation and clogging in continuous flow dichlorocyclopropanation, we established that the flow reaction can be performed only with T-junctions and microtubes. Unlike tertiaryamines, when quaternaryammoniumsalts were used as PTCs, precipitation and clogging in microchannels did not occur, and an excellent yield of up to 99% was obtained after optimizing the reaction temperature, reactant
Reverse regioselective photosensitized nucleophilic addition of arylcyclopropanes
作者:Jin-Yi Wu、Jing-Chen Mai、Pan Kai、Ho Tong-Ing
DOI:10.1016/s0040-4039(97)10708-0
日期:1998.2
Reverse regioselective nucleophilic addition of 1-aryl-2,2-dichlorocyclopropanes (1–7) photosensitized by 1,4-dicyanobenzene (DCB) has been observed to give 1-aryl-1-methoxy-3,3-dichloropropanes (for methanol) as the only regioselective products.