ethyl 2-methyl-4-phenyl-4H-chromene-3-carboxylate

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 新黄酮类化合物
• 英文名称: ethyl 2-methyl-4-phenyl-4H-chromene-3-carboxylate
• 化学式: C₁₉H₁₈O₃
• 分子量: 294.35
• InChiKey: KFLDNGQYDIQYFH-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.1
• 重原子数：
  22
• 可旋转键数：
  4
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.21
• 拓扑面积：
  35.5
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为产物：
  描述：

  2-[(2-Bromo-phenyl)-phenyl-methyl]-3-oxo-butyric acid ethyl ester 在 copper(l) iodide 、 caesium carbonate 作用下， 以 四氢呋喃 为溶剂， 反应 5.0h， 以80%的产率得到ethyl 2-methyl-4-phenyl-4H-chromene-3-carboxylate
  参考文献：
  名称：

  O-Arylation versus C-Arylation:  Copper-Catalyzed Intramolecular Coupling of Aryl Bromides with 1,3-Dicarbonyls

  摘要：

  The copper-catalyzed intramolecular coupling of aryl bromides with 1,3-dicarbonyls via a six-membered ring closure was examined. With CuI (10 mol %) as the catalyst, N,N'-dimethylethylenediamine as the ligand, and Cs2CO3 as the base, the reactions of alpha-(2-bromobenzyl)-beta-keto esters in THF at refluxing temperature afforded the corresponding substituted 4H-1-benzopyrans in high yields via O-arylation. On the other hand, the reactions of delta-(2-bromophenyl)-beta-keto esters in refluxing dioxane led to the formation of 3,4-dihydronaphthalen-2(1H)-one derivatives via C-arylation.

  DOI：

  10.1021/jo060747t

文献信息

• Brönsted acid ionic liquid-catalyzed direct benzylation, allylation and propargylation of 1,3-dicarbonyl compounds with alcohols as well as one-pot synthesis of 4H-chromenes
  作者：Kazumasa Funabiki、Takuya Komeda、Yasuhiro Kubota、Masaki Matsui

  DOI：10.1016/j.tet.2009.07.012

  日期：2009.9

  Recyclable ionic Brönsted acid was prepared in nearly quantitative yield by reacting 1-butylimidazole with an equimolar amount of 1,3-propanesultone, followed by treatment with an equimolar amount of trifluoromethanesulfonic acid. The ionic Brönsted acid-catalyzed direct benzylation, allylation and propargylation of 1,3-dicarbonyl compounds with various alcohols in ionic liquid [N-ethyl-N-methyl imidazolium

  通过使1-丁基咪唑与等摩尔量的1,3-丙磺酸内酯反应，然后用等摩尔量的三氟甲磺酸处理，以接近定量的产率制备可回收的离子布朗斯台德酸。在离子液体[ N-乙基-N-甲基咪唑三氟甲磺酸盐（EMIOTf）]中，离子布伦斯台德酸催化1,3-二羰基化合物与各种醇的直接苄基化，烯丙基化和炔丙基化，在100°C下进行3小时，在不使用任何危险或挥发性溶剂且没有任何副产物（例如盐）的情况下，以良好的优良收率获得了相应的产品。此外，将1，3-二羰基化合物串联苄基化-环化-脱水，得到官能化的4 H在该催化反应中也获得了1-色烯。
• Facile construction of functionalized 4H-chromene via tandem benzylation and cyclization
  作者：Jinmin Fan、Zhiyong Wang

  DOI：10.1039/b812046c

  日期：——

  A series of functionalized 4H-chromenes have been constructed by using a novel FeCl3-catalyzed benzylation–cyclization tandem reaction.

  一系列官能化的4H-色烯化合物通过一种新型FeCl3催化的苄基化-环化串联反应构建而成。
• One-Pot Synthesis of 4H-Chromenes by Tandem Benzylation and Cyclization in the Presence of Sodium Bisulfate on Silica Gel
  作者：Tadashi Aoyama、Takumi Yamamoto、Saki Miyota、Mamiko Hayakawa、Toshio Takido、Mitsuo Kodomari

  DOI：10.1055/s-0033-1339026

  日期：——

  A simple and efficient method has been developed for the synthesis of 4H-chromenes from o-hydroxybenzylic alcohols and dicarbonyl compounds containing active methylene groups by using silica gel supported sodium bisulfate. Various dicarbonyl compounds such as diketones, keto esters, and keto amides can be used in the synthesis of the 4H-chromenes.
• O-Arylation versus C-Arylation:  Copper-Catalyzed Intramolecular Coupling of Aryl Bromides with 1,3-Dicarbonyls
  作者：Yewen Fang、Chaozhong Li

  DOI：10.1021/jo060747t

  日期：2006.8.1

  The copper-catalyzed intramolecular coupling of aryl bromides with 1,3-dicarbonyls via a six-membered ring closure was examined. With CuI (10 mol %) as the catalyst, N,N'-dimethylethylenediamine as the ligand, and Cs2CO3 as the base, the reactions of alpha-(2-bromobenzyl)-beta-keto esters in THF at refluxing temperature afforded the corresponding substituted 4H-1-benzopyrans in high yields via O-arylation. On the other hand, the reactions of delta-(2-bromophenyl)-beta-keto esters in refluxing dioxane led to the formation of 3,4-dihydronaphthalen-2(1H)-one derivatives via C-arylation.