Paul was a doctor / chemist. He attended the Koeniglichen Gymnasium in Koenigshuette and Munich University.

Yad Vashem records state that Alice and Paul had lived in Hamburg and in Bergen (Norway) where their property was subject to Aryanization, and that Alice died in Auschwitz concentration camp the day after transportation from Berlin. A Yad Vashem testimonial says that Paul also died in Auschwitz concentration camp.

mappingthelives.org does not mention the emigration to Norway (although it does so for Alice), and has him deported to Sachsenhausen concentration camp.

Possibly the "Prof. P. Borinski" refered to in this 1928 paper by Prof. Dr. Alfred Stock as director of the Chemical Institute of the Berlin Health-Administration who founded the Mercury Investigative Agency of the City of Berlin. A Dr Phil Paul Borinski, chemist, is listed in the 1930 Berlin address book at NW87, Claudius Strasse 7.