Cu-Catalyzed Synthesis of Tetrasubstituted 2,3-Allenols through Decarboxylative Silylation of Alkyne-Substituted Cyclic Carbonates
摘要:
An efficient and mild Cu-catalyzed protocol has been developed for the decarboxylative silylation of alkyne-functionalized cyclic carbonate substrates affording 2,3-allenols featuring four different substituents. This practical methodology gives access to a wide scope of tetrasubstituted functionalized allenes in excellent yields.
Alkylation of benzene with α-diazoketones via cycloheptatrienyl intermediates
作者:M. Anthony McKervey、D. Noel Russell、M. Fiona Twohig
DOI:10.1039/c39850000491
日期:——
Benzyl ketones can be synthesised efficiently from benzene and α-diazoketones with sequential catalysis by rhodium(II) trifluoroacetate and trifluoroacetic acids; the process involves cycloheptatrienylintermediates.
Enantioselective Alkenylation via Nickel-Catalyzed Cross-Coupling with Organozirconium Reagents
作者:Sha Lou、Gregory C. Fu
DOI:10.1021/ja1017046
日期:2010.4.14
A new family of organometallic compounds, organozirconiumreagents, are shown to serve as suitable partners in cross-coupling reactions of (activated) secondary alkyl electrophiles. Thus, the first catalytic method for coupling secondary alpha-bromoketones with alkenylmetal reagents has been developed, specifically, a mild, versatile, and stereoconvergent carbon-carbon bond-forming process that generates