Leo sternbach diazepam. Mother's Little Helper – Valium at 35 ABC News, December 17, 1998. It was soon eclipsed by Valium, also known as diazepam, when it was . Leo Sternbach. Sternbach was born in 1908 in Opatija, then in Austria-Hungary and now part of CroatiaInvented by Dr. . Diazepam was the second benzodiazepine to be invented by Sternbach of Hoffmann-La Roche . . Sternbach, a research chemist who was foremost among the team of scientists . . . It was first synthesized by Dr. Leo Ste... more