環状酸無水物と硫化水素の加圧反応

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  • The Reaction of Cyclic Acid Anhydrides with Hydrogen Sulfide under Pressure
  • カンジョウサン ムスイブツ ト リュウカ スイソ ノ カアツ ハンノウ

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説明

The reaction of cyclic acid anhydrides with hydrogen sulfide under pressure was investigated.<BR>The reactivity of anhydrides at 200°C was in the following order, maleic anhydride (1) > succinic anhydride (2) > hexahydrophthalic anhydride (3) > phthalic anhydride (4) > 1, 8-naphthalic anhydride (5).<BR>The main products obtained in this reaction were the corresponding acid thioanhydride, thiolactone, and dicarboxylic acid. (1) reacted to yield only tar-like materials containing sulfur, and (5) hardly reacted. <BR>This reaction was promoted by such catalysts as protonic acids or Lewis acids, and the yields of acid thioanhydrides increased.<BR>Similarly the reaction was promoted by triethylamine (TEA) and the main product was a thiolactone. This result is ascribed to the acceleration of the reduction with hydrogen sulfide by addition of TEA.

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