Identify the name reaction: 

The reaction involves benzene reacting with $$CO$$ and $$HCl$$ in the presence of anhydrous $$AlCl_3$$ and $$CuCl$$.

Under these conditions, $$CO$$ and $$HCl$$ generate a formyl electrophile in situ. This electrophile undergoes electrophilic aromatic substitution with benzene, introducing a $$-CHO$$ group onto the aromatic ring.

As a result, benzene is converted into benzaldehyde.

This method of direct formylation of an aromatic ring using $$CO$$ and $$HCl$$ in the presence of $$AlCl_3$$ and $$CuCl$$ is known as the Gatterman-Koch reaction.

Stephen reaction converts nitriles into aldehydes and does not involve direct formylation of benzene.

Etard reaction oxidizes the methyl group of toluene to form an aldehyde using chromyl chloride.

Rosenmund reduction converts acid chlorides into aldehydes using hydrogen over a poisoned palladium catalyst.

Hence, the given reaction is the $$\text{Gatterman-Koch reaction}$$