How is Dimethyl 2,5-Dioxahexanedioate (CAS: 88754-66-9) typically synthesized?

Dimethyl 2,5-Dioxahexanedioate can be synthesized via a multi-step process. A common method involves the reaction of oxalic acid with dimethyl carbonate. This reaction is typically catalyzed by a transition metal complex, such as copper. The yield is around 85%, with good selectivity towards the desired product. This synthesis is performed under mild conditions to ensure high purity of the final product.