ChemInform Abstract: An Efficient Cobalt Catalyst for the Neutral Diels-Alder Reaction of Acyclic 1,3-Dienes with Internal Alkynes.

Abstract The efficiently cobalt(I)-catalysed neutral Diels–Alder type reactions of internal alkynes with substituted 1,3-dienes is described. The regiochemistry for the dihydroaromatic products of reactions of isoprene with unsymmetrical reaction partners (2-alkynes and 1-trimethylsilyl-1-hexyne) is investigated. The dihydroaromatic reaction products are easily oxidised electrochemically to the corresponding functionalised durene and isodurene derivatives.