Oxidative Coupling Reaction of Acetylene Compounds in the Solid State
作者:Fumio Toda、Yoshihisa Tokumaru
DOI:10.1246/cl.1990.987
日期:1990.6
Oxidative coupling of acetylene compound with cupric salt in the solid state was found to proceed efficiently and selectively. The couplingreaction of α,ω-diacetylenes in the solid state gave the linear oligomers in contrast with the formation of the cyclic products in the solution reaction.
Influence of Bases and Ligands on the Outcome of the Cu(I)-Catalyzed Oxidative Homocoupling of Terminal Alkynes to 1,4-Disubstituted 1,3-Diynes Using Oxygen as an Oxidant
作者:Subbarayappa Adimurthy、Chandi C. Malakar、Uwe Beifuss
DOI:10.1021/jo900246z
日期:2009.8.7
The efficient Cu(I)-catalyzed oxidative homocoupling of terminal alkynes in the presence of a base using an amine as a ligand and oxygen as an oxidant yields the symmetrical 1,3-diynes with yields of up to 99%. The outcome of the couplings critically depends on the proper choice of base and ligand as well as reaction conditions. Best results were observed with 2.0 mol % CuCl, 1.5 mol % TMEDA or DBEDA
The Thermal [2+2] Cycloaddition of 1-Halo-2-(9-fluorenylidene)ethylene to Afford Fluorene-9-spiro-1′-[2′-halo-3′-(9-fluorenylidene)-4′-halomethylene]cyclobutane
作者:Fumio Toda、Hiroharu Motomura、Hirofumi Oshima
DOI:10.1246/bcsj.47.467
日期:1974.2
The thermal [2+2]cycloaddition products of 1-chloro-(II) and 1-bromo-2-(9-fluorenylidene)ethylene (X) were found to be two head-to-tail dimers, fluorene-9-spiro-1′-[2′-chloro-3′-(9-fluorenylidene)-4′-chloromethylene]cyclobutane (VI) and its bromo-analog (XI) respectively.