Reactivity of Stabilized Vinyl Diazo Derivatives toward Unsaturated Hydrocarbons: Regioselective Gold-Catalyzed Carbon-Carbon Bond Formation
作者:José Barluenga、Giacomo Lonzi、Miguel Tomás、Luis A. López
DOI:10.1002/chem.201203217
日期:2013.1.28
alkenyldiazo compounds and unsaturated substrates. The process represents a new CC bond‐formation reaction in which alkenes, alkynes, and arenes are active reagents for the Cγ‐allylation, ‐allenylation, and ‐arylation, respectively, of alkenyldiazo substrates (see scheme). The reactivity pattern is likely to rely on the formation of a highly electrophilic alkenylgold carbenoid, which may be involved in a
Polyunsaturated Alkyl Amides from Echinacea: Synthesis of Diynes, Enynes, and Dienes
作者:Nicholas J. Matovic、Patricia Y. Hayes、Kerry Penman、Reginald P. Lehmann、James J. De Voss
DOI:10.1021/jo200289f
日期:2011.6.3
constructing alkyl amides containing conjugated diyne and isomerically pure enyne and diene moieties and may be adapted easily for the preparation of other alkyl amides present in Echinacea spp. Terminal-conjugated diynes were prepared by a Cadiot–Chodkiewitz coupling/deprotection sequence utilizing a protected bromoacetylene, and methyl-substituted diynes were made via a base-catalyzed rearrangement of