“…2) led to a b/a ratio of around 1.5:1, compared to a 1:1.5 ratio when the corresponding dibenzoate 97 is used under the same conditions. 44 Some of the protecting groups that were introduced to separate the diastereomers arising from the Reformatsky reaction proved also useful to separate the nucleoside anomers by crystallisation. 25 For example, the 4-phenylbenzoate protected difluororibose derivative 44 (Scheme 25).…”