[GRAPHIC]Temporary union of alkynes in the Fe(CO)(5)-promoted cyclocarbonylation provides a method for carbonylative cross-coupling of alkynes to construct unsymmetrically substituted cyclopentadienones.
Conjugate Additions of Carbon Nucleophiles to Cyclopentadienones
作者:Anthony J. Pearson、Jin Bum Kim
DOI:10.1021/ol0300571
日期:2003.7.1
graphicReactions of cyclopentadienones 1 with alkylmagnesium bromides were investigated and gave 1,4 adduct and/or 1,2 adduct.
Diels−Alder Reactions of Cyclopentadienones with Aryl Alkynes To Form Biaryl Compounds
作者:Anthony J. Pearson、Yan Zhou
DOI:10.1021/jo900559n
日期:2009.6.5
Diels-Alder reactions of cyclopentadienones, to afford substituted biaryls, were studied using an expanded substrate base. Electron-withdrawing groups on the aryl alkyne dienophile facilitated the reaction, and these substrates gave better yields than those with electron-donating substituents. Steric effects were also found to be important, and o,o'-dimethylphenylacetylene gave much poorer yield of biaryl product.