Determining the excited-state substituent constants of furyl and thienyl groups
作者:Junyan Qu、Chao-Tun Cao、Chenzhong Cao
DOI:10.1002/poc.3799
日期:2018.5
and their wavelength of absorption maximum λmax was recorded. For the wavenumber νmax (cm−1, νmax = 1/λmax) of the obtained λmax, a quantitative correlation analysis was performed, and 6 excited‐statesubstituent constants of groups X were obtained by means of curve‐fitting method. Taking the νmax values of total 90 compounds of styrene derivatives as a data set (including 25 compounds from reference
Palladium-Catalyzed Dehydrogenative Coupling of Furans with Styrenes
作者:Chahinez Aouf、Emilie Thiery、Jean Le Bras、Jacques Muzart
DOI:10.1021/ol901570p
日期:2009.9.17
Under palladium(II)-catalyzed and oxidative conditions, the coupling of furans with styrenes leads to the formation of Heck-type products in medium to good yields. The reaction is highly regio- and stereoselective, giving trans-olefins predominantly.
Aerobic Dehydrogenative Heck Reactions of Heterocycles with Styrenes: A Negative Effect of Metallic Co-Oxidants
作者:Alexandre Vasseur、Dominique Harakat、Jacques Muzart、Jean Le Bras
DOI:10.1002/adsc.201200787
日期:2013.1.14
The aerobicdehydrogenativeHeckreaction (DHR) of heterocycles with styrenes was found to be more efficient in the absence of metallic co‐oxidants. According to a study of the isotope effect, the CH cleavage was the rate‐determining step of the catalytic cycle. Electrospray ionization mass spectrometry, subsequent MS/MS, and high‐resolution mass spectrometry were used to detect and characterize catalytic