Heterocycle–Heterocycle Strategies: (2-Nitrophenyl)isoxazole Precursors to 4-Aminoquinolines, 1<i>H</i>-Indoles, and Quinolin-4(1<i>H</i>)-ones
作者:Keith C. Coffman、Teresa A. Palazzo、Timothy P. Hartley、James C. Fettinger、Dean J. Tantillo、Mark J. Kurth
DOI:10.1021/ol400787y
日期:2013.4.19
Reductive heterocycle–heterocycle (heterocycle → heterocycle; H–H) transformations that give 4-aminoquinolines, 3-acylindoles, and quinolin-4(1H)-ones from 2-nitrophenyl substituted isoxazoles are reported. When this methodology is applied to 3,5-, 4,5-, and 3,4-bis(2-nitrophenyl)isoxazoles, chemoselective heterocyclization gives quinolin-4(1H)-ones, and 4-aminoquinolines, exclusively.
据报道,还原性杂环 - 杂环(杂环 → 杂环;H–H)转化为 4-氨基喹啉、3-酰基吲哚和喹啉-4(1 H)-从 2-硝基苯基取代的异恶唑转化。当此方法应用于 3,5-、4,5- 和 3,4-双(2-硝基苯基)异恶唑时,化学选择性杂环化会专门生成喹啉-4(1 H)-酮和 4-氨基喹啉。