Organic Process Research & Development

A Continuous Protodecarboxylation of Heteroaromatic Carboxylic Acids in Sulfolane.

U Tilstam

文献索引：Tilstam, Ulf Organic Process Research and Development, 2012 , vol. 16, # 8 p. 1449 - 1454

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被引用次数: 7

摘要

A versatile, scalable method for the decarboxylation of indole-2-carboxylic acids has been found. With one equivalent of DBU in sulfolane, indole-2-carboxylic acid derivatives were cleanly decarboxylated in a 316 stainless steel tube reactor at 300° C within 20 min. The corresponding indole derivatives were obtained in good yields. It was also found that indole- 2-carboxylic acid (1) can be decarboxylated in either pure sulfolane or sulfolane with 3% ...