In each reaction box, place the best reagent and conditions from the list below. A reagent may be used more than once. Hint: The step is conducted at -78°C.
2)
3)
4)
5)
CrO3, H2SO4
KMnO4
phenol
DIBAL-H
Mg, Et2O
H2, Pt
PhLi
LiAlH4
PBr3; pyridine
H3O+
CH3MgBr
NaBH4