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Full-Text Articles in Physical Sciences and Mathematics
Nicholas Reactions Of Alkynyl- And Alkenyltrifluoroborates, Brent St. Onge, James R. Green
Nicholas Reactions Of Alkynyl- And Alkenyltrifluoroborates, Brent St. Onge, James R. Green
Chemistry and Biochemistry Publications
The Lewis acid mediated Nicholas reaction of potassium alkynyltrifluoroborates and propargyl acetate- hexacarbonyldicobalt complexes affords 1,4-diyne dicobalt hexacarbonyl complexes in good yields. The analogous Nicholas reactions of potassium alkenyltrifluoroborates give 1,3-enyne dicobalt hexacarbonyl complexes in most cases, although the initial site of reaction can vary. Potassium vinyltrifluoroborate itself affords alkynylcyclopropane complexes.
Activated Cyclopropanes: A Remarkable Breadth Of Recent Chemistry, James R. Green, Victor Snieckus
Activated Cyclopropanes: A Remarkable Breadth Of Recent Chemistry, James R. Green, Victor Snieckus
Chemistry and Biochemistry Publications
The reactions of cyclopropanes activated by electron-withdrawing groups and electron-donating groups – donor–acceptor (DA) cyclopropanes – and with alkenyl or alkylidene substituents has been an area of recent intense research activity. This Cluster contains contributions from many of the leading research groups in this area, and provides a concise introduction to the rich ring-opening, ring-expansion, dimerization, and cycloaddition chemistry of these compounds.
Tandem 4+3 Cycloaddition/Nucleophilic Trapping Reactions Of Butyne-1,4-Diether Dicobalt Hexacarbonyl Complexes, Yafan Lu, James R. Green
Tandem 4+3 Cycloaddition/Nucleophilic Trapping Reactions Of Butyne-1,4-Diether Dicobalt Hexacarbonyl Complexes, Yafan Lu, James R. Green
Chemistry and Biochemistry Publications
Butyne-1,4-diether hexacarbonyldicobalt complexes 1 undergo Lewis acid mediated 4+3 cycloadditions with allylsilanes, incorporating halide from the Lewis acid to give halocycloheptynes 3, 6, 7. A phenyl group may be incorporated in place of the halogen (to give 8) by use of benzene as solvent and with B(C6F5)(3) as the Lewis acid; chlorobenzene and toluene also participate in the process.