Helferich method
The Helferich method may refer to:
- Glycosylation of an alcohol using a glycosyl acetate as glycosyl donor and a Lewis acid (eg a metal halide) as promoter (1).
- Glycosylation of an alcohol using a glycosyl halide as a glycosyl donor and a mercury salt as promoter (cf the Koenigs-Knorr reaction, which uses silver salts as promoters) (2).
References
[1] B. Helferich, E. Schmitz-Hillebrecht, Ber. 66, 378 (1933). [2] B. Helferich, J. Zirner, Chem. Ber. 95, 2604 (1962).
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