In Situ Generation of Vinyl Allenes and Its Applications to One-Pot Assembly of Cyclohexene, Cyclooctadiene, 3,7-Nonadienone, and Bicyclo[6.4.0]dodecene Derivatives with Palladium-Catalyzed Multicomponent Reactions
作者:Phil Ho Lee、Kooyeon Lee、Youngjin Kang
DOI:10.1021/ja054144v
日期:2006.2.1
reaction of vinyl triflate with allenylindium followed by Pd-catalyzed carbon monoxide insertion reaction gave the corresponding 3,7-nonadienone product via tandemPd-catalyzedcross-coupling and [4 + 4 + 1] annulation. TandemPd-catalyzedcross-coupling, [4 + 4] cycloaddition, and [4 + 2] cycloaddition provided the rapid synthesis of bicyclo[6.4.0]dodecene derivatives starting from alpha-bromovinyl arenes
The [3]Dendralene Motif as an Entry into Nazarov Cyclizations by Silylium-Ion Initiation
作者:Supriya Rej、Hendrik F. T. Klare、Martin Oestreich
DOI:10.1021/acs.orglett.2c04166
日期:2023.1.20
with a silylium ion, thereby initiating a Nazarov cyclization. The cationic intermediate emerging from the electrocyclic ring closure is captured by hydride in the presence of excess hydrosilane. The resulting benzannulated methylenecyclopentene derivatives bearing a silylalkyl group then engage in silylium-ion regeneration followed by an unusual endo-selective intramolecular hydrosilylation. This cascade