2-tert-butyl 8-methyl 5-amino-3,4-dihydroisoquinoline-2,8(1H)-dicarboxylate is a heterocyclic scaffold containing an isoquinoline system substituted with amino, methyl, and tert-butyl ester moieties. This elaborate structure engages in versatile nucleophilic additions, substitutions and decarboxylations reactions through its reactive functional groups.