Jw. Herndon et al., Synthesis of benzofuran derivatives through the coupling of conjugated dienynes with Fischer carbene complexes, TETRAHEDR L, 41(45), 2000, pp. 8687-8690
The reaction of Fischer carbene complexes with conjugated dienylacetylene d
erivatives followed by treatment with iodine leads to benzofuran derivative
s in good-to-excellent yields. Equivalent products can be obtained from cou
pling of conjugated enediynes with Fischer carbene complexes in the presenc
e of hydrogen atom donors. (C) 2000 Published by Elsevier Science Ltd.