Silylium-Ion-Promoted Hydrosilylation of Aryl-Substituted Allenes: Interception by Cyclization of the Allyl-Cation Intermediate
作者:Supriya Rej、Hendrik F. T. Klare、Martin Oestreich
DOI:10.1021/acs.orglett.2c00011
日期:2022.2.18
hydrosilylation can be intercepted by an intramolecular electrophilic aromatic substitution or a Nazarov electrocyclization of an allyl-cation intermediate in the form of its endo isomer. By this, the selective formation of either the conventional 1,2-hydrosilylation product (vinylsilane) or a cyclized product (silylated indane) can be controlled.
Palladium‐Catalyzed Insertion of an Allene into an Aminal: Aminomethylamination of Allenes by CN Bond Activation
作者:Jianhua Hu、Yinjun Xie、Hanmin Huang
DOI:10.1002/anie.201403774
日期:2014.7.7
aminomethylamination of allenes with aminals by CN bond activation is described. This direct and operationally simple method provides a fundamentally novel approach for the synthesis of 1,3‐diamines. Mechanistic studies suggest that a unique cationic π‐allylpalladium complex containing an aminomethyl moiety is generated as a key intermediate through the carbopalladation of the allene with a cyclometalated