Page 37 - Phytochemistry 2 (06-PG 605)
P. 37

( - ) Quinine

• Quinine occurs as white crystalline powder

• It is levorotary, gives quinidine (d-isomer) when warmed with KOH in amyl
   alcohol.

• Quinine is diacidic bases due to presence of 2N atoms),

• They form two types of salts.

1- Neutral salts (Quinine sulphate), insoluble in water

2-Acidic salts (Quinine bisulphate),soluble in water.

• The alkaloids decolourizes both solution of KMnO4 and bromine water solution,
   due to the presence of unsaturated vinyl group.

( + ) Quinidine

dextro isomer of quinine.

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