Umpolung Chemistry Flashcards
1
Q
Umpolung meaning
A
Inverse polarity
2
Q
Acyl anion equivalent
A
CN-
3
Q
How to remove CN-
A
H+/H2O gives alcohol
H+/Alcohol gives corresponding ester
4
Q
Nitro alkene
A
Soft nucleophile, acyl anion equivalent used for conjugated additions, unmasked to C=O using Nef Reaction = TiCL3 with water
5
Q
Thioacetal
A
acyl anion eqivalent used for direct nucleophilic attack, added using LA catalysis and SHCH2CH2CH2SH and nBuLi converts to corresponding lithium reagent to be used