Chemical consequences of fluorine substitution. Part 1. Experimental and theoretical results on Diels–Alder reactions of α- and β-fluorostyrenes†
作者:Thomas Ernet、Andreas H. Maulitz、Ernst-Ulrich Würthwein、Günter Haufe
DOI:10.1039/b102684b
日期:——
on the phenyl ring of 2 and 3 slightly accelerate the reaction rate by a maximum factor of 4. DFT calculations (UB3LYP/6-31G(d)) of activation energies for furan and isobenzofuran as model dienes reflect the order of the reaction rates of the kinetic measurements. The charge difference in the doublebond carbon atoms of the different dienophiles pre-determines the activation energies for the endo- and
作者:Yan Li、Wan Nie、Zhe Chang、Jia-Wang Wang、Xi Lu、Yao Fu
DOI:10.1038/s41929-021-00688-w
日期:——
few examples of its use in asymmetriccross-coupling. Here we report a cobalt-catalysed enantioselective C(sp3)–C(sp3) coupling reaction, namely, alkene hydroalkylation, to access chiral fluoroalkanes. This reaction represents a catalyst-controlled enantioselective coupling mode in which a tailor-made auxiliary is unnecessary; via this reaction, an aliphatic C–F stereogenic centre can be introduced at