Iridium(I)-Catalyzed Intramolecular Hydrocarbonation of Alkenes: Efficient Access to Cyclic Systems Bearing Quaternary Stereocenters
作者:David F. Fernández、Moisés Gulías、José L. Mascareñas、Fernando López
DOI:10.1002/anie.201705105
日期:2017.8.1
wide variety of cyclic systems featuring methyl-substituted quaternary stereocenters is described. The method relies on the use of a cationic IrI–bisphosphine catalyst, which promotes a carboxamide-assisted activation of an olefinic C(sp2)−H bond followed by exo-cyclization to a tethered 1,1-disubstituted alkene. The extension of the method to aromatic and heteroaromatic C−H bonds, as well as developments
A novel method for the preparation of differentially substituted phosphonoacetates and phosphonoacetamides using 4-DMAP catalyzed ester exchange reaction has been developed.