Convenient synthesis of novel 2,2-dialkyl-1,2-dihydronaphtho[2,1-b]furans
作者:Doug Vaughan、Amitabh Jha
DOI:10.1016/j.tetlet.2009.07.087
日期:2009.10
2,2-dialkylacetaldehydes with electron-rich 2-naphthols in presence of p-TSA under closed-vessel solvent-free microwave irradiation conditions resulted in formation of corresponding dihydronaphtho[2,1-b]furans in good to excellent yields. In several cases, small amounts of 14-alkyl-14H-dibenzo[a,j]xanthenes were also formed.
2,2-二烷基乙醛与p -TSA存在下的富电子2-萘在密闭容器无溶剂微波辐射条件下反应,可形成相应的二氢萘[2,1- b ]呋喃,收率高至优异。在几种情况下,还形成了少量的14-烷基-14 H-二苯并[ a,j ]蒽。
Iron-Catalyzed Oxidative Radical Cross-Coupling/Cyclization between Phenols and Olefins
作者:Zhiliang Huang、Liqun Jin、Ye Feng、Pan Peng、Hong Yi、Aiwen Lei
DOI:10.1002/anie.201210023
日期:2013.7.8
Selectively free: A highly efficient and selective iron‐catalyzedoxidative radical cross‐coupling/cyclization to prepare dihydrobenzofurans under mild conditions had been established. Phenols and olefins are directly utilized as clean nucleophiles. Mechanistic investigations revealed that the reaction proceeds through a radical pathway, and the high selectivity is due to the Lewis acid.
Iron-Catalyzed Oxidative Cross-Coupling of Phenols and Alkenes
作者:Umesh A. Kshirsagar、Clil Regev、Regev Parnes、Doron Pappo
DOI:10.1021/ol401532a
日期:2013.6.21
A novel bioinspired iron-catalyzedoxidativecross-coupling reaction betweenphenols and conjugated alkenes was developed. This method enables the direct coupling of phenols with styrene, α-alkyl- and α-arylstyrenes, β-alkyl styrenes, and stilbenes, thereby providing a new strategy for the preparation of the pharmacologically important 2,3-dihydrobenzofuran motif. In addition, this study revealed that