This manuscript details the process research and development of a convergent and safe approach to 1 on a multikilo scale. Specific highlights of the process development efforts will be described, including the development of a dehydrogenation method for dihydropyrimidines and a thermochemically safe synthesis of a 1, 2, 4-aminotriazole fragment. A key feature of the synthesis is the use and optimization of a modified Julia− ...