Twofold Carbon-Carbon Bond Formation by Intra- and Intermolecular Radical Reactions of Aryl Diazonium Salts
作者:Hannelore Jasch、Yannick Landais、Markus R. Heinrich
DOI:10.1002/chem.201300354
日期:2013.6.24
Cascade reactions: A variety of novel cascade reactions can be performed when the known and well‐studied radical 5‐ or 6‐exo‐cyclization of an aryldiazonium salt is conducted in the presence of alkenes and further optional scavengers (see scheme).
Formation of functionalized dihydrobenzofurans by radical cyclization
作者:Gordon F. Meijs、Athelstan L. J. Beckwith
DOI:10.1021/ja00279a038
日期:1986.9
Etude de la cyclisation de tetrafluoroborates d'allyloxy-2 benzenediazonium induite par des agents de thiodediazoniation et des reactifs suivies de dediazoniation de type «Sandmeyer»
四氟硼酸盐 d'allyloxy-2 benzodiazonium induite par des agent de thiodediazoniation et des reactifs suivies de dediazoniation de type «Sandmeyer»
Formation of dihydrobenzofurans by radical cyclization
作者:Athelstan L. J. Beckwith、Gordon F. Meijs
DOI:10.1039/c39810000136
日期:——
A survey of methods for the generation of aryl radicals from o-alkenyloxyarene diazonium salts demonstrates that dihydrobenzofuran derivatives can be efficiently formed by treatment of (1) or (2) with Bun3SnH–Et2O or with NaI–Me2CO; methods utilising the iodo-compound (3; X = I) are less effective.
对由邻链烯基氧基芳烃重氮盐生成芳基的方法的调查表明,通过用Bu n 3 SnH–Et 2 O或NaI–Me 2 CO处理(1)或(2),可以有效地形成二氢苯并呋喃衍生物。; 利用碘化合物(3 ; X = I)的方法效果较差。
Cyclizing Radical Carboiodination, Carbotelluration, and Carboaminoxylation of Aryl Amines
作者:Marcel Hartmann、Armido Studer
DOI:10.1002/anie.201403968
日期:2014.7.28
Radicalcarboiodination of various arylamines is reported. Aryl diazonium salts, generated in situ from the corresponding arylamines, are reacted with Bu4NI to provide the corresponding arylradicals which undergo 5‐exo or 6‐exo cyclization. Iodine abstraction eventually affords the carboiodinated products in good to excellent yields. If TEMPO is added, the cascade provides the cyclized carboaminoxylation
Copper-catalyzed carbochlorination or carbobromination via radical cyclization of aryl amines
作者:Jianing Ouyang、Xiaolong Su、Yu Chen、Yaofeng Yuan、Yi Li
DOI:10.1016/j.tetlet.2016.02.054
日期:2016.3
A copper-catalyzed radical carbochlorination or carbobromination is reported. Intramolecular cyclization occurred through aryl radicals generated in situ from bench-stable aryl amines with aqueous hydrogen halides as the halogen sources. A variety of (3-halomethyl)-1,2-dihydrobenzofuran derivatives were prepared in up to 92% yield through this one-pot protocol utilizing widely available starting materials