Gold(I)-catalyzed efficient synthetic transformation was achieved to access the tetrahydrobenzo[h]cyclopropa[c]chromenes from allyl-substituted 1,6-diynes. Cyclopropane-fused tetrahydrobenzochromenes were obtained regioselectively in ≤92% yields. In this atom-economic organic transformation, three new C−C bonds were formed sequentially in one pot. Letter pubs.acs.org/OrgLett
An efficient gold-catalyzed formation of indenylidene-derived 1H-isochromene-4-carbaldehydes from substituted 1,5,10-triyne-O-silanes was developed under mild reaction conditions. In this reaction gold- catalyzed selective oxidation, 1,2-migration of enynyl group, nucleophilc addition and...
An efficient synthetic organic transformation was developed to access isoquinoline-substituted isobenzofurans by reaction of substituted 1,5diynes with isoquinoline N-oxides. Moderate to excellent yields of isoquinolinederived isobenzofurans were achieved by formation of a new C−C and two C− O bonds in the presence of copper catalyst in one pot. whereas quinolinesubstituted isobenzofurans were obtained when the reaction was conducted using quinoline N-oxides and 1,5-diynes in the presence copper catalyst.
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