Abstract
The reaction of a variety of unsaturated bond-containing 1,6-enynes with diazo compounds in the presence of [(IPr)AuBF4] as catalyst precursor at room temperature leads to the general formation of alkenylbicyclo[3.1.0]hexane derivatives with good yields, which were, afterwards, when heated in o-xylene solvent in the presence of [Rh(CO)2Cl]2 as catalyst at 150 0C affords two types of product, depending on the type of tether in alkenylbicyclo[3.1.0]hexane derivatives. In the first case, rhodium insertion into three member ring followed by 1,3-shift gives tetrahydro-1H-cyclopenta[c]furan. Whereas, in the second case, rhodium insertion and beta-hydride elimination affords conjugate diene compound. Both cases give good yields.