: C 2865 (OTTOKEMI) Cyclopropylmagnesium bromide, 0.5 M in THF Cas 23719-80-4 -,used in chemical research. used in Grignard reaction that finds application as the key step in the preparation of aminopropylindenes, a chemotype of oxidosqualene cyclase (OSC) inhibitors from Grundmann′s ketone.