Pauson-Khand Carbonylative Cocyclizations of Acetylenes with Cyclopropylallenes
作者:Armin de Meijere、Bernard Cazes、Mohammed Ahmar、Mario Knoke
DOI:10.1055/s-2007-965882
日期:2007.2
The Pauson-Khand-like carbonylative cocyclizations of alkynes with cyclopropylallene and with 1,3-dicyclopropylallene occur regioselectively and lead to 4-(cyclopropylmethylene)cyclopentenones (43-59% for six examples).
A Versatile Access to 1-Cyclopropyl-2-aryl-1,3,5-hexatrienes - Domino Heck-Diels-Alder Reactions of 1,3-Dicyclopropyl-1,2-propadiene
作者:Armin de Meijere、Mario Knoke
DOI:10.1055/s-2003-36797
日期:——
dicyclopropyl-acetylene was developed. The allene, when coupled with several aryl iodides and aryl bromides underpalladium catalysis in the presence of a reactive dienophile, was found to undergo a dominoHeck-Diels-Alderreaction to yield 3-(1'-arylalkenyl)-substituted cyclohexenes 9 in moderate to good yields (36-86%).