Mechanisms by which Alkynes React with CpCr(CO)<sub>3</sub>H. Application to Radical Cyclization
作者:Deven P. Estes、Jack R. Norton、Steffen Jockusch、Wesley Sattler
DOI:10.1021/ja306120n
日期:2012.9.19
a single electron transfer (SET) as the rate-determining step. The radical anion of dimethylfumarate was observed by EPR spectroscopy during the course of the reaction, supporting this claim. The aromatic 1,6 eneyne (8) gave cyclized products in 78% yield under catalytic conditions (35 psi H(2)), presumably by the 5-exo-trig cyclization of the vinyl radical arising from H• transfer. Using a cobaloxime