Abstract

CpFe(CO) 2[C(OEt)R]BF 4 complexes can be prepared by reaction of CpFe(CO) 2(isobutylene)BF 4 with monoalkylated acetylenes in methylene chloride/ethanol solutions. Methyl propiolate yields methyl trans-2-ethoxy-acrylate, in a reaction catalytic in CpFe(CO) 2(isobutylene)BF 4, and internal acetylenes can be transformed to CpFe(CO) 2(vinyl ether)BF 4 complexes.

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