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Brüggen, Uwe von der and Mayr, Herbert (1988): Comment of the use of dichloromethyl methyl ether as formylating agent. In: Chemische Berichte, Vol. 121, No. 1: pp. 191-193
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Abstract

In contrast to normal alkenes, dialkylacetylenes can be formylated with dichloromethyl methyl ether (1) in the presence of 1.2 equivalents of boron trichloride. A rationalisation for the different behaviour of alkenes and alkynes arises from the NMR specktroscopic investigation of the reaction intermediates.