The Synthesis of Vegetable Tannins

1. Tannin
2. Digallic Acid
3. Ellagic Acid
4. Depsides
Carbomethoxylation of Hydroxybenzoic Acids
Chlorides of Carbomethoxyhydroxybenzoic Acids
Preparation of Didepsides
Preparation of Tridepsides
Preparation of Tetradepsides
Tannoid Substances of the Tannin Type
Chart showing the Decomposition of Products of Tannin


SECTION II

Synthesis of Tanning Matters

1. Aromatic Sulphonic Acids
2. Condensation of Phenols
Condensation of Hydroxybenzene
Condensation of Dihydroxybenzene
Trihydroxy benzene
Polyhydroxybenzenes
Quinone
Phenolic Ethers
Nitro Bodies
Amino Bodies