The name of the reaction by Which the -COCl group is directly converted to -CHO group is:

Wolf-Kishner Reduction and Clemensen Reduction are used to convert carbonyl groups (aldehydes and ketones) to alkanes. They are not suitable for converting an acyl chloride to an aldehyde.

Pinacol Reduction is used to convert ketones to secondary alcohols.

Rosenmund Reduction utilizes a palladium catalyst and hydrogen gas (H2) to selectively reduce an acyl chloride to an aldehyde. This reaction is particularly useful because it avoids the complete reduction to an alkane, which can occur under other reducing conditions.