(Z)-5-nitroaurone | 131948-11-3

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 橙酮类黄酮
• 英文名称: (Z)-5-nitroaurone
• 英文别名: 5-nitroaurone；(2Z)-2-benzylidene-5-nitro-1-benzofuran-3-one
• CAS: 131948-11-3
• 化学式: C₁₅H₉NO₄
• 分子量: 267.241
• InChiKey: UESQCCJAMNBJBN-ZSOIEALJSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.4
• 重原子数：
  20
• 可旋转键数：
  1
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  72.1
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为产物：
  描述：

  2'-acetoxy-5'-nitrochalcone 在 sodium hydroxide 、 N-溴代丁二酰亚胺(NBS) 作用下， 以 甲醇 为溶剂， 反应 25.0h， 生成 (Z)-5-nitroaurone
  参考文献：
  名称：

  惠勒黄酮合成中的黄酮形成

  摘要：

  发现当被氢氧化乙醇水溶液环化时，通过2'-乙酰氧基查耳酮的侧链的溴甲基化形成的二氢查耳酮产生少量的黄酮以及主要的产品金酮。黄酮类化合物的产率随碱浓度的增加而增加。用于形成金酮的氢氧化物的最佳浓度低于1％。当在环化2'-氧官能团的对面引入硝基取代基时，会大大降低O-杂环的收率。

  DOI：

  10.1016/s0040-4020(01)87902-3

文献信息

• Versatile and Expeditious Synthesis of Aurones via Au^I-Catalyzed Cyclization
  作者：Hassina Harkat、Aurélien Blanc、Jean-Marc Weibel、Patrick Pale

  DOI：10.1021/jo702197b

  日期：2008.2.1

  Aurones are conveniently formed in a three-step procedure including a goldI-catalyzed cyclization of 2-(1-hydroxyprop-2-ynyl)phenols as a highly regio- and stereoselective key step. A wide diversity of derivatives can be obtained starting from substituted salicylaldehydes. Synthesis of natural 4,6,3‘,4‘-tetramethoxyaurone and structure revision of two natural products (dalmaisione D and 4‘-chloroaurone)

  可以以三步程序方便地形成Aurones，包括金I催化的2-（1-羟基丙-2-炔基）苯酚的环化反应，这是高度区域选择性和立体选择性的关键步骤。从取代的水杨醛开始可以得到各种各样的衍生物。实现了天然4,6,3'，4'-四甲氧基金龙的合成和两种天然产物（dalmaisione D和4'-氯金龙）的结构修饰。
• Water-Promoted, Silver–Phosphine Complex–Catalyzed Stereoselective Cyclization of 2-(1-Hydroxy-3-arylprop-2-ynyl)phenols Leading to a Highly Efficient Approach to Aurones
  作者：Mingdeng Lin、Min Yu、Chengyan Han、Chao-Jun Li、Xiaoquan Yao

  DOI：10.1080/00397911.2010.517613

  日期：2011.11.1

  Silver-phosphine complexes can be utilized as highly efficient catalysts for the cyclization of 2-(1-hydroxy-3-arylprop-2-ynyl)phenols (1) to give product 2, key intermediates to synthesize aurones (4), with good yields and stereoselectivities in water-toluene mixed solvent. With fluoride as the counteranion, complete E- or Z-stereoselectivities were achieved at high temperature or room temperature, respectively. Furthermore, after removing water from the reaction mixtures, the toluene solution containing crude products 2 can be treated by MnO2 directly without further purification, to give aurones 4 in good yields.
• Flavone formation in the wheeler aurone synthesis
  作者：John A. Donnelly、Clement L. Higginbotham

  DOI：10.1016/s0040-4020(01)87902-3

  日期：1990.1

  bromomethylation of the side-chain of 2'-acetoxychalcones were found to produce minor quantities of flavones as well as the major product aurones when cyclized by aqueous ethanolic sodium hydroxide. The yields of flavone increased with increasing base concentration. The optimum concentration of hydroxide for aurone formation was below 1%. Greatly diminished yields of O-heterocycles were obtained when a nitro substituent

  发现当被氢氧化乙醇水溶液环化时，通过2'-乙酰氧基查耳酮的侧链的溴甲基化形成的二氢查耳酮产生少量的黄酮以及主要的产品金酮。黄酮类化合物的产率随碱浓度的增加而增加。用于形成金酮的氢氧化物的最佳浓度低于1％。当在环化2'-氧官能团的对面引入硝基取代基时，会大大降低O-杂环的收率。