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Under mild acid catalysis, reacts with ethynyl alcohols to give allenic esters, which can be conjugated over alumina. For examples, see: Org. Synth. Coll., 8, 251 (1993):

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The products with allylic alcohols undergo Claisen allyl ether rearrangement, with addition of a 2-carbon unit and repositioning of the double bond: J. Am. Chem. Soc., 92, 741 (1970); Tetrahedron Lett., 21, 1285 (1980):

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Reaction with BF3 etherate gives the moderately stable selective alkylating agent, methyl diethoxycarbenium tetrafluoroborate: Synth. Commun., 19, 2307 (1989). Compare Triethyl orthoformate, A13587.• Reagent for facile esterification of sulfonic and carboxylic acids: Tetrahedron Lett., 34, 7355 (1993).
• For further examples, see: Org. Synth. Coll., 6, 584 (1988); 7, 164 (1990).