Carboxys
- Carboxylic Acid to Acid Chloride (SOCl2 or (COCl)2)
- Carboxylic Acids → Primary Alcohols with LiAlH₄
- Carboxylic Acids + Alcohols → Esters (Fischer Esterification)
- Carboxylic Acid to Amide (DCC Coupling)
- Carboxylic Acid → (Acetic / Mixed) Anhydride with NaOH then CH₃COCl
- Hell–Volhard–Zelinsky Reaction — Carboxylic Acid → α‑Halo Acid