{ALF} Alkylation of ethylene thioacetals proceeds only to the monoalkyl salt unless water is added, when the thioacetal is cleaved to give the carbonyl compound and the tetraalkyl ethane bis-sulfonium salt: Synthesis, 135 (1981). Alkylation on S to promote leaving group ability has also been used in a synthesis of oxiranes from ß-hydroxy sulfides: J. Am. Chem. Soc., 95, 3429 (1973); J. Chem. Soc., Chem. Commun., 714 (1975).

{ALD} Beilstein:1(4)1248

{TRC} Curphey, T.J. et al.: Org. Synth. 6, 1019 (1968);

{ALF} N,N-Dialkyl arylcarboxamides, useful as substrates for directed metallation reactions, can be converted to methyl esters in high yield: Tetrahedron, 56, 9875 (2000).

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