How is 8-Chloro-1,3-dimethyl-3,9-dihydro-1H-purine-2,6-dione - 2-(diphenylmethoxy)-N,N-dimethylethanamine (1:1) (CAS: 523-87-5) typically synthesized?

This compound is typically synthesized via a multi-step process involving the coupling of a purine derivative with a diphenylmethanol derivative in the presence of a suitable catalyst, such as a Lewis acid. The reaction involves the formation of a new ester bond, followed by amination to introduce the N,N-dimethylethanamine moiety. The overall yield can be around 70-80%, with good selectivity towards the desired product.