Alkylation of 1 -1ithio trisubstituted glycals obtained via the corresponding I-tributylstannyl derivatives constitutes a novel entry into C-glycosides.$ All new compounds were characterized by spectroscopic and/or microanalytical data. Yields refer to chromatographically pure products. Optical rotations were measured in chloroform.
The glucal tris(silylether) (I) produces the novel 1‐tributyltin derivative (IIb) which is metallated and treated with electrophiles to yield 1‐C‐substituted products (III), (V) and (VII).
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