The Davis-Beirut reaction: N1,N2-disubstituted-1H-indazolones via 1,6-electrophilic addition to 3-alkoxy-2H-indazoles.

The Davis-Beirut reaction: N1,N2-disubstituted-1H-indazolones via 1,6-electrophilic addition to 3-alkoxy-2H-indazoles.
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DOI:
10.1021/ol2010424
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发表时间:
2011-06-17
期刊:
影响因子:
5.2
通讯作者:
Kurth, Mark J.
Kurth, Mark J.
中科院分区:
化学1区
文献类型:
--
作者:
Conrad, Wayne E.;Fukazawa, Ryo;Haddadin, Makhluf J.;Kurth, Mark J.

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通过Davis-Beirut反应可获得底物3-甲氧基-2H-吲唑(1a)、苯并恶嗪[3,2-b]吲唑(1d)和恶唑并[3,2-b]吲唑(1e),各种亲电试剂(酸酐、酸性氯化物、碳酸氯酸盐、磺酰氯和烷基溴)反应生成不同的N1,N2-二取代-1H-吲唑酮。对于某些亲电试剂,在吲唑1D上进行AERORC(加成电性、开环和闭环)过程可生成吲唑并咪唑酮。这些N1,N2-二取代-1H-吲唑酮的一个耐人寻味的方面是,它们准备通过例如这里报道的叠氮-炔环加成化学进行多样化。
A variety of electrophiles (anhydrides, acid chlorides, carbonochloridates, sulfonyl chlorides, and alkyl bromides) react with 3-methoxy-2H-indazole (1a), benzoxazin[3,2-b]indazole (1d), and oxazolino[3,2-b]indazole (1e) – substrates available by the Davis-Beirut reaction – to yield a diverse set of N1,N2-disubstituted-1H-indazolones. With certain electrophiles, an AERORC (Addition of the Electrophile, Ring Opening, and Ring Closure) process on indazole 1d results in indazoloindazolone formation. An intriguing aspect of these N1,N2-disubstituted-1H-indazolones is that they are poised for diversification through, for example, azide-alkyne cycloaddition chemistry reported here.
DOI: 10.1021/jo0524831
发表时间: 2006-03-31
影响因子: 3.6
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