Even the oldest available aerial imagery shows that these two have been demolished and replaced with a large C-shaped building. Based on the DOB records it looks like happened in 2014 (BIN 3426243 possibly using the address 211 Crown St.)

I don't know what the building actually is though. Presumably not part of Brooklyn Preparatory School, which according to wikipedia closed in 1972. Possibly part of the Medgar Evars CUNY campus.