Disclosed is a method for preparing a C-nucleoside compound represented by Formula (III) or salt thereof. The present method has a high reaction yield, is simple to operate, uses a single metal reagent, has stable reaction temperature conditions, does not require frequent changes to the reaction system during the operation process, is suitable for scale-up synthesis, is suitable for large-scale production of Remdesivir, and has low costs.

##STR00001##

The present invention relates to processes for preparing glucopyranosyl-substituted benzyl-benzene derivatives of general formula III,

##STR00001##

wherein R.sup.1, R.sup.2 and R′ are defined according to claim 1; and the use of such processes in the synthesis of SGLT2 inhibitors.

The present invention relates to processes for preparing glucopyranosyl-substituted benzyl-benzene derivatives of general formula III,

##STR00001##

wherein R.sup.1, R.sup.2 and R′ are defined according to claim 1; and the use of such processes in the synthesis of SGLT2 inhibitors.

The present invention relates to processes for preparing glucopyranosyl-substituted benzylbenzene derivatives of general formula III, wherein R.sup.1, R.sup.2 and R are defined according to claim 1; and the use of such processes in the synthesis of SGLT2 inhibitors.

##STR00001##

The present invention relates to processes for preparing glucopyranosyl-substituted benzylbenzene derivatives of general formula III, wherein R.sup.1, R.sup.2 and R are defined according to claim 1; and the use of such processes in the synthesis of SGLT2 inhibitors.

##STR00001##

The present invention relates to processes for preparing glucopyranosyl-substituted benzyl-benzene derivatives of general formula III,

##STR00001##

wherein R.sup.1, R.sup.2 and R are defined according to claim 1; and the use of such processes in the synthesis of SGLT2 inhibitors.

The present invention relates to processes for preparing glucopyranosyl-substituted benzyl-benzene derivatives of general formula III,

##STR00001##

wherein R.sup.1, R.sup.2 and R are defined according to claim 1; and the use of such processes in the synthesis of SGLT2 inhibitors.