8, 9, 11-Trichloro-5H-benzofuro[3,2-c]carbazol-10-ol analogues have been synthesized by treating 2,3-dihydro-1H-carbazol-4(9H)-one with chloranil/fluoranil without any catalyst and is found to be applicable across a range of carbazolone substrates. A possible mechanism has been proposed.

中文翻译：

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无催化剂合成8、9、11-三卤代-5 H-苯并呋喃[3,2 - c ]咔唑-10-醇

8、9、11 -Trichloro-5 H-苯并呋喃[3,2 - c ] carbazol-10-ol类似物是通过用苯二甲腈处理2,3-dihydro-1 H -carbazol-4（9 H）-one合成的不含任何催化剂的间苯二酚/氟苯胺，发现可用于多种咔唑酮底物。已经提出了一种可能的机制。