Directing Group Assisted Copper-Catalyzed Chemoselective O-Aroylation of Phenols and Enols Using Alkylbenzenes
摘要:
By using alkylbenzenes as aroyl surrogates, copper(II) catalyzed chemoselective O-aroylations of 1,3-dicarbonyl compounds and phenolic -OH ortho to carbonyl (-CHO, -COR) groups have been achieved. A dual mechanism operating in tandem for these transformations has been supported by a crossover experiment.
Directing Group Assisted Copper-Catalyzed Chemoselective <i>O</i>-Aroylation of Phenols and Enols Using Alkylbenzenes
作者:Saroj Kumar Rout、Srimanta Guin、Arghya Banerjee、Nilufa Khatun、Anupal Gogoi、Bhisma K. Patel
DOI:10.1021/ol401682a
日期:2013.8.16
By using alkylbenzenes as aroyl surrogates, copper(II) catalyzed chemoselective O-aroylations of 1,3-dicarbonyl compounds and phenolic -OH ortho to carbonyl (-CHO, -COR) groups have been achieved. A dual mechanism operating in tandem for these transformations has been supported by a crossover experiment.
Titanium-induced syntheses of furans, benzofurans and indoles
作者:Alois Fürstner、Denis N. Jumbam
DOI:10.1016/s0040-4020(01)89848-3
日期:1992.1
Highly reactive titanium on graphite as the reagent of choice promotes intramolecular McMurry type reactions of acyloxy- and acylamido carbonyl compounds affording furans, benzofurans and indoles in good to excellent yields. A variety of reducible groups in the substrates is tolerated (e.g. -F, -Cl, -Br, -I, -CF3, -OMe, -CN, -thiophenyl, -COOR, -CONR2) and strained products such as 11h can be obtained