Cycloaddition Reaction of Hexafluoro-2-butyne with an (qz-Thiophosphinito)cobalt ComplexInsertion of hexafluoro-2-butyne (2) into the Co-P bond of the results in the formation of the stable (q3-cyclobutenyl)cobalt (q2-thiosphosphinito)cobalt complex (OC)2Ph3PCo(qz-S PEt2) complex 3. According to an X-ray structural analysis 3 crys-(1) and subsequent 12 + 21 cycloaddition to a second alkyne 2 tallizes in the triclinic space group Pi with Z = 2.
Synthesis, Properties, and Reactions of Metal-Containing Heterocycles.Part 83. Synthesis of Differently Substituted Furans by Cobalt-Induced Cyclocotrimerization of a P=S Function with Acetylenedicarboxylic Dialkyl Esters.-Eight furans of type (III) are synthesized in 14-23% yields by the title reaction. A mechanism is proposed. -(LINDNER, E.; SCHLENKER, T.; FAWZI, R.; MAICHLE, C.; J. Organomet.
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