(S)-6-chloro-3-nitro-2-phenyl-2H-chromene | 1384100-30-4

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 黄酮类化合物
• 英文名称: (S)-6-chloro-3-nitro-2-phenyl-2H-chromene
• 英文别名: 8-methoxy-3-nitro-2-phenyl-2H-chromene；(2S)-6-chloro-3-nitro-2-phenyl-2H-chromene
• CAS: 1384100-30-4
• 化学式: C₁₅H₁₀ClNO₃
• 分子量: 287.702
• InChiKey: PWJBINFPOKELBF-HNNXBMFYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.1
• 重原子数：
  20
• 可旋转键数：
  1
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.07
• 拓扑面积：
  55
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为产物：
  描述：

  3-bromo-5-chloro-3,4-dihydro-4-hydroxy-3-nitro-2-phenyl-2H-1-benzopyran 在 samarium diiodide 作用下， 以 四氢呋喃 为溶剂， 反应 2.0h， 以91%的产率得到(S)-6-chloro-3-nitro-2-phenyl-2H-chromene
  参考文献：
  名称：

  Synthesis of Enantiopure 2-C-Glycosyl-3-nitrochromenes

  摘要：

  A novel methodology has been developed to obtain enantiopure 2-C-glycosyl-3-nitrochromenes. First, (Z)-1-bromo-1-nitroalkenes were prepared from the corresponding sugar aldehydes through a sodium iodide-catalyzed Henry reaction with bromonitromethane followed by elimination of the resulting 1-bromo-1-nitroalkan-2-ols. In the next step, reaction of the sugar-derived (Z)-1-bromo-1-nitroalkenes with o-hydroxybenzaldehydes afforded enantiopure (2S,3S,4S)-3-bromo-3,4-dihydro-4-hydroxy-3-nitro-2H-1-benzopyrans, which, upon SmI2-promoted beta-elimination, yielded chiral enantiopure 2-C-glycosyl-3-nitrochromenes.

  DOI：

  10.1021/jo4021634

文献信息

• Synthesis of substituted chiral chromans via organocatalytic kinetic resolution of racemic 3-nitro-2-aryl-2H-chromenes with ketones catalyzed by pyrrolidinyl-camphor-derived organocatalysts
  作者：Dhananjay R. Magar、Kwunmin Chen

  DOI：10.1016/j.tet.2012.05.019

  日期：2012.7

  pyrrolidinyl-camphor derivative 2b as a bifunctional organocatalyst under neat conditions in the presence of AcOH at 0 °C. In general, the organocatalytic asymmetric Michael addition of ketones proceeded smoothly to give the functionalized Michael adducts (3a–n) with good-to-high diastereo- and enantioselectivities (up to 92:8 dr, 93% ee, and 47% yield). The less reactive chromenes (S)-1a–h, k, l and (R)-1i–j were

  在0°C存在AcOH的纯净条件下，使用吡咯烷基-樟脑樟衍生物2b作为双功能有机催化剂，探索了外消旋的2-芳基-3-硝基-2 H-苯甲基（1a – l）的动力学拆分。通常，酮的有机催化不对称迈克尔加成反应顺利进行，从而使官能化迈克尔加合物（3a - n）具有良好至高的非对映体和对映体选择性（高达92：8 dr，93％ee和47％的收率） 。活性较低的色烯（S）-1a – h，k，l和（R）-1i–以高化学产率和中等光学纯度（高达42％的化学产率和72％的ee）回收了j。
• A Novel Enantioselective Catalytic Tandem Oxa-Michael-Henry Reaction: One-Pot Organocatalytic Asymmetric Synthesis of 3-Nitro-2<i>H</i>-chromenes
  作者：Dan-Qian Xu、Yi-Feng Wang、Shu-Ping Luo、Shuai Zhang、Ai-Guo Zhong、Hui Chen、Zhen-Yuan Xu

  DOI：10.1002/adsc.200800535

  日期：2008.11.3

  An enantioselective oxa-Michael–Henry reaction of substituted salicylaldehydes with nitroolefins that proceeds though an aromatic iminium activation (AIA) has been developed by using a chiral secondary amine organocatalyst and salicylic acid as a co-catalyst. The corresponding 3-nitro-2H-chromenes were obtained in moderate-to-good yields with up to 91% ee under mild conditions. Based on the experimental

  通过使用手性仲胺有机催化剂和水杨酸作为助催化剂，开发了取代的水杨醛与硝基烯烃的对映选择性氧杂-迈克尔-亨利反应，该反应通过芳香亚胺活化（AIA）进行。在温和条件下，以中等至良好的收率获得了相应的3-硝基-2 H-色烯，其中ee高达91％。基于实验结果和中间体的ESI质谱检测，已提出了一个合理的过渡态来解释激活和不对称诱导的起源。
• Synthesis of function-oriented 2-phenyl-2H-chromene derivatives using l-pipecolinic acid and substituted guanidine organocatalysts
  作者：Bhaskar C. Das、Seetaram Mohapatra、Philip D. Campbell、Sabita Nayak、Sakkarapalayam M. Mahalingam、Todd Evans

  DOI：10.1016/j.tetlet.2010.02.143

  日期：2010.5

  Organocatalytic domino oxa-Michael/aldol reactions between salicylaldehyde with electron deficient olefins are presented. We screened guanidine, 1,1,3,3-tetramethylguanidine (TMG) and L-pipecolinic acid as organocatalysts for this transformation. 3-Substituted 2-phenyl-2H-chromene derivatives are synthesized with high yields and with poor enantioselectivity (5-17% ee) using L-pipecolinic acid while TMG works well with cinnamaldehyde without using co-catalyst. These 3-substituted-2-phenyl-2H-chromene derivatives are further derivatized to synthesize triazole and biotin-containing chromene derivatives, to facilitate purification of protein targets. (C) 2010 Elsevier Ltd. All rights reserved.
• Synthesis of Enantiopure 2-<i>C</i>-Glycosyl-3-nitrochromenes
  作者：Raquel G. Soengas、Humberto Rodríguez-Solla、Artur M. S. Silva、Ricardo Llavona、Filipe A. Almeida Paz

  DOI：10.1021/jo4021634

  日期：2013.12.20

  A novel methodology has been developed to obtain enantiopure 2-C-glycosyl-3-nitrochromenes. First, (Z)-1-bromo-1-nitroalkenes were prepared from the corresponding sugar aldehydes through a sodium iodide-catalyzed Henry reaction with bromonitromethane followed by elimination of the resulting 1-bromo-1-nitroalkan-2-ols. In the next step, reaction of the sugar-derived (Z)-1-bromo-1-nitroalkenes with o-hydroxybenzaldehydes afforded enantiopure (2S,3S,4S)-3-bromo-3,4-dihydro-4-hydroxy-3-nitro-2H-1-benzopyrans, which, upon SmI2-promoted beta-elimination, yielded chiral enantiopure 2-C-glycosyl-3-nitrochromenes.