Benzoin Condensation · Umpolung of Two Aldehydes
unseel.com · 2 PhCHO → PhCH(OH)C(=O)Ph · acyl anion
Carbon C1 δ+ electrophile
C-C bonds 0
Stage two aldehydes, no way to bond
Aldehyde carbon C=O
Catalyst (CN⁻ / NHC)
Oxygen
Nucleophilic carbon (δ−)
New C-C bond / benzoin
Unseel.com · Benzoin Condensation