All articles of this category A convenient synthesis of 3-spiro-fused benzofuran-2(3 H )-ones via palladium-catalyzed chemoselective carbonylation of vinyl triflates in the presence of o -iodophenols, followed by regioselective intramolecular Heck reaction, is described. benzofuran-2(3 H )-ones - triflates - palladium - phenoxycarbonylation - intramolecular Heck reaction
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Anacardio et al. (1995) studied this question.