Helv. chim. acta, 79 (1996) 8, 2114-2136
Cramer Hagen, Pfleiderer Wolfgang
Nucleosides. Part LXI. A simple procedure for the monomethylation of protected and unprotected ribonucleosides in the 2'-O- and 3'-O-position using diazomethane and the catalyst stannous chloride
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http://dx.doi.org/10.1002/hlca.19960790808
