A mixture of 56 g (0.5 mole) of 2-furoic acid (see p. 43), m.p. 128–132°, and 100 ml of dry benzene was prepared in a 300-ml round-bottomed flask fitted with reflux condenser protected by a calcium chloride tube; a solution of 71.5 g (0.6 mole) of freshly distilled thionyl chloride in 50 ml of benzene was then added. The upper end of the calcium chloride tube was connected to a Tishchenko vessel containing a solution of caustic alkali, which served to absorb hydrogen chloride and sulfur dioxide liberated during the reaction.


Calcium Chloride Sulfur Dioxide Heterocyclic Compound Convenient Method Acid Chloride 
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Copyright information

© Springer Science+Business Media New York 1959

Authors and Affiliations

  • A. L. Mndzhoian

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