Rh(III)-Catalyzed Stereoselective C–C Bond Cleavage of ACPs with <i>N</i>-Phenoxyacetamides: The Critical Role of the Nucleophilic Directing Group
作者:Anurag Singh、Arnab Dey、Chandra M. R. Volla
DOI:10.1021/acs.joc.1c01135
日期:2021.8.6
phenols in nonpolar solvents, whereas [3 + 2]-annulation leading to dihydrobenzofurans was realized in polar fluorinated solvents. It was observed that the nucleophilic directing group controls the elimination of β-carbon and so plays a vital role for achieving high stereoselectivities. The synthetic utility of the dienylation and annulation was demonstrated by carrying out gram scale reactions and further
Rhodium(III)-Catalyzed Transannulation of Cyclopropenes with<i>N</i>-Phenoxyacetamides through CH Activation
作者:Hang Zhang、Kang Wang、Bo Wang、Heng Yi、Fangdong Hu、Changkun Li、Yan Zhang、Jianbo Wang
DOI:10.1002/anie.201408555
日期:2014.11.24
An efficient rhodium(III)‐catalyzed synthesis of 2H‐chromene from N‐phenoxyacetamides and cyclopropenes has been developed. The reaction represents the first example of using cyclopropenes as a three‐carbon unit in rhodium(III)‐catalyzed C(sp2)Hactivations.