How is 4-(Methylthio)benzaldehyde (CAS: 3446-89-7) typically synthesized?

4-(Methylthio)benzaldehyde is commonly synthesized via the reaction of methyl mercaptan with benzaldehyde. The reaction typically proceeds via a nucleophilic substitution at the benzaldehyde aldehyde group. Other methods include the reduction of 4-methylthioacetophenone with sodium borohydride. The yield is usually around 80-85%, and the method involves the use of a milder catalyst for better selectivity.