Synthesis of benzofurans, indoles and benzopyrans via oxidative free radical cyclisations using cobalt salen complexes.
VF Patel, G Pattenden, JJ Russell
Index: Patel, Vinod F.; Pattenden, Gerald; Russell, Jamie J. Tetrahedron Letters, 1986 , vol. 27, # 20 p. 2303 - 2306
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Citation Number: 36
Abstract
Abstract Reactions between the Co (I) species derived from cobalt (III)'salen'(1), and (O-allyl) or (O-but-3-enyl) iodophenol, leads to isolatable cobalt complexes, viz (2),(13), which can be converted into substituted benzofurans, ie(5),(6) and benzopyrans, ie(14),(15); similarly interaction between (18) and Co (I)'salen'led, in one step, to the 3-methylindole (19).
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