Synthesis of 2-nitroindoles via the Sundberg indole synthesis
Synthesis of 2-nitroindoles via the Sundberg indole synthesis
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DOI:
10.1016/s0040-4039(97)01272-0
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发表时间:
1997-08-11
影响因子:
1.8
通讯作者:
Gribble, GW
中科院分区:
文献类型:
--
作者:
Pelkey, ET;Gribble, GW
A three-step sequence has been developed for converting o-nitrobenzaldehydes into 2-nitroindoles. The key step involves the thermolysis of 2-(o-azidophenyl)nitroethylene (10) in xylenes which gives 2-nitroindole (4) in 54% yield, akin to the classic Sundberg indole synthesis. This procedure has also been utilized to synthesize 5,6-dimethoxy-2-nitroindole (14). (C) 1997 Elsevier Science Ltd.