Acid-Catalyzed Condensations of Ninhydrin with Aromatic Compounds. Preparation of 2,2-Diaryl-1,3-indanediones and 3-(Diarylmethylene)isobenzofuranones<sup>1</sup>
作者:Douglas A. Klumpp、Shyla Fredrick、Siufu Lau、Kevin K. Jin、Robert Bau、G. K. Surya Prakash、George A. Olah
DOI:10.1021/jo990197h
日期:1999.7.1
Ninhydrin (1) reacts with aromatic compounds in acid solution to give condensation products. In H2SO4, 1 reacts with arenes to give 2,2-diaryl-1,3-indanediones (2a-f). In superacidic triflic acid (CF3SO3H, TfOH), 1 reacts with arenes to give 3-(diarylmethylene)isobenzofuranones (3a-e). Products 3a-e are proposed to have formed by a condensation and rearrangement involving dicationic intermediates.
茚三酮 (1) 在酸溶液中与芳香族化合物反应生成缩合产物。在 H2SO4 中,1 与芳烃反应生成 2,2-二芳基-1,3-茚二酮 (2a-f)。在超酸性三氟甲磺酸 (CF3SO3H, TfOH) 中,1 与芳烃反应生成 3-(二芳基亚甲基)异苯并呋喃酮 (3a-e)。建议通过涉及双阳离子中间体的缩合和重排形成产物 3a-e。苯并[f]茚三酮也在 H2SO4 中与 C6H6 反应生成类似的缩合产物。