The Davis–Beirut Reaction: <i>N</i><sup>1</sup>,<i>N</i><sup>2</sup>-Disubstituted-1<i>H</i>-Indazolones via 1,6-Electrophilic Addition to 3-Alkoxy-2<i>H</i>-Indazoles
作者:Wayne E. Conrad、Ryo Fukazawa、Makhluf J. Haddadin、Mark J. Kurth
DOI:10.1021/ol2010424
日期:2011.6.17
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
多种亲电子试剂(酸酐、酰氯、碳氯化物、磺酰氯和烷基溴)与 3-甲氧基-2 H-吲唑 ( 1a )、苯并恶嗪[3,2- b ]吲唑 ( 1d ) 和恶唑并 [3] 发生反应,2- b ]吲唑 ( 1e ) — 戴维斯-贝鲁特反应可用的底物 — 产生多种N 1 , N 2 -二取代-1 H-吲唑酮。对于某些亲电子试剂,吲唑1d的 AERORC(亲电子试剂的添加、开环和闭环)过程会导致形成吲唑并吲唑酮。这些N 1 的一个有趣方面, N 2 -二取代-1 H -吲唑酮是通过例如此处报道的叠氮-炔环加成化学实现多样化。