With the rise of the National Socialists he emigrated to Italy and France where he continued to work as a screenwriter.
His last screenplay was "Félicie Nanteuil" (1944).
Shortly afterwards he was arrested together with his wife and brought to the detention camp Drancy. Afterwards he was deported to Auschwitz and finally to the KZ Flossenbürg where he died in 1945.
He began his career as a writer and director at the Stadttheater Heidelberg at the end of the 20s. Beside it he also wrote some radio plays, among others together with Max Ophüls like "Philologen-Freuden" and "Verkehrsbüro".
He wrote his first screenplay in 1931 for the movie "Wer nimmt die Liebe ernst...?" (1931), afterwards he was engaged in the filmbusiness regularly.
The screenwriter and author Kurt Alexander was born as Kurt Rosenbaum in Berlin.