Journal
ADVANCED SYNTHESIS & CATALYSIS
Volume 347, Issue 9, Pages 1295-1300Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adsc.200505095
Keywords
cross-coupling; homogeneous catalysis; palladium; phosphane ligands; Sonogashira reaction
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A mixture of Na2PdCl4, CuI and (t-Bu)(3)PH+BF4- (molar ratio 4:3:8) dispersed in H2N(i-Pr)(2)Br-+(-) can be used as a single source pre-catalyst for the Sonogashira coupling of aryl bromides with various aryl- and alkylacetylenes in HN(i-Pr)(2) solvent. Arylacetylenes require just 0.005 mol % of Pd catalyst at 80 degrees C, with TOFs ranging between 3,200 and 10,000 h(-1).
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