3,4-dimethoxy-β-bromostyrene

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: 3,4-dimethoxy-β-bromostyrene
• 英文别名: 1-bromo-2-(3',4'-dimethoxyphenyl)ethene；2-bromo-1-(3,4-dimethoxyphenyl)ethylene；ω-Brom-3.4-dimethoxy-styrol；β-bromo-3,4-dimethoxy-styrene；1²-Brom-3.4-dimethoxy-1-vinyl-benzol；β-Brom-3,4-dimethoxy-styrol；3.4-Dimethoxy-styrylbromid；4-(2-Brom-vinyl)-veratrol；4-(2-bromoethenyl)-1,2-dimethoxybenzene
• 化学式: C₁₀H₁₁BrO₂
• 分子量: 243.1
• InChiKey: KOIRFVGVZDAJBD-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.6
• 重原子数：
  13
• 可旋转键数：
  3
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.2
• 拓扑面积：
  18.5
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  3,4-dimethoxy-β-bromostyrene 在 N-溴代丁二酰亚胺(NBS) 、 水 作用下， 以 乙腈 为溶剂， 以100%的产率得到α,α-dibromomethyl-(3,4-dimethoxyphenyl)methanol
  参考文献：
  名称：

  Enantiomerically pure α-methoxyaryl acetaldehydes as versatile precursors: a facile chemo-enzymatic methodology for their preparation

  摘要：

  A facile and efficient synthesis of optically active alpha-methoxyaryl acetic acids (up to 95% ee), alpha-methoxyaryl ethanols (up to 93% ee) and alpha-methoxyaryl acetonitriles (up to 93% ee) was achieved via Arthrobacter sp. lipase-catalyzed kinetic resolution of masked aldehydes as the key synthons, that is, alpha-hydroxyaryl acetaldehyde acetals. (C) 2008 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetasy.2008.10.023
• 作为产物：
  描述：

  3,4-二甲氧基肉桂酸 在 溴 、 sodium carbonate 作用下， 以 氯仿 、 水 为溶剂， 反应 0.5h， 生成 3,4-dimethoxy-β-bromostyrene
  参考文献：
  名称：

  C-1 Alkynylation of N-Methyltetrahydroisoquinolines through CDC: A Direct Access to Phenethylisoquinoline Alkaloids

  摘要：

  本文介绍了一种使用CuI-DEAD的N-甲基四氢异喹啉与炔烃之间的直接交叉偶联反应，该反应以高产率选择性地生成了C-1位炔基化的产物。这种区域选择性与先前报道的N,N-二甲基苄胺反应结果形成鲜明对比，后者几乎完全或主要生成N-甲基炔基化产物。C-1位取代的丙炔基异喹啉能通过Pd/C催化轻易还原为苯乙基异喹啉。这一反应序列提供了一条合成甲氧啡啉、同劳丹诺素及其他苯乙基异喹啉生物碱的简捷途径。

  DOI：

  10.1055/s-0031-1290532

文献信息

• Nickel‐Catalyzed, Regio‐ and Enantioselective Benzylic Alkenylation of Olefins with Alkenyl Bromide
  作者：Jiandong Liu、Hegui Gong、Shaolin Zhu

  DOI：10.1002/anie.202012614

  日期：2021.2.19

  A NiH‐catalyzed migratory hydroalkenylation reaction of olefins with alkenyl bromides has been developed, affording benzylic alkenylation products with high yields and excellent chemoselectivity. The mild conditions of the reaction preclude olefinic products from undergoing further isomerization or subsequent alkenylation. Catalytic enantioselective hydroalkenylation of styrenes was achieved by using

  已开发出NiH催化的烯烃与烯基溴化物的迁移性加氢烯基化反应，可提供高收率和出色的化学选择性的苄基烯基化产物。该反应的温和条件阻止烯烃产物进行进一步的异构化或随后的烯基化。通过使用手性双恶唑啉配体实现苯乙烯的催化对映选择性加氢烯基化。
• Transition-Metal-Free Iodine Catalyzed Selenocayanation of Styrenyl Bromides and an Easy Access to Benzoselenophenes via Intermediacy of Styrenyl Selenocyanate
  作者：Pintu Maity、Bidisha Paroi、Brindaban C. Ranu

  DOI：10.1021/acs.orglett.7b02571

  日期：2017.11.3

  convenient procedure has been developed for the synthesis of styrenyl selenocyanates and benzoselenophenes from readily available styrenyl bromides by reaction with potassium selenocyanate in the presence of iodine under specified conditions. A series of both compounds have been obtained by this procedure. The synthesis of styrenyl selenocyanates has not been previously reported, and thus this method is of

  已经开发了一种方便的方法，用于在指定条件下，在碘的存在下，通过与硒化氰化钾反应，从易于获得的苯乙烯基溴化物中合成苯乙烯基硒化氰酸酯和苯并硒吩。通过该程序获得了一系列的两种化合物。以前没有报道苯乙烯基硒代氰酸酯的合成，因此该方法具有重要意义。
• Ligand-accelerating low-loading copper-catalyzed effective synthesis of (E)-1,3-enynes by coupling between vinyl halides and alkynes performed in water
  作者：Peng Sun、Hong Yan、Linhua Lu、Defu Liu、Guangwei Rong、Jincheng Mao

  DOI：10.1016/j.tet.2013.06.063

  日期：2013.8

  The useful conjugated enynes could be easily prepared via low-loading (0.0001 mol %) copper-catalyzed coupling between vinyl halides and terminal alkynes. It is noteworthy that this reaction could be preformed in water without using any co-solvents and the desired 1,3-enynes could be obtained with good yields. In the catalytic reaction, ligand-acceleration effect was markable.

  有用的共轭烯炔可以通过乙烯基卤化物和末端炔烃之间的低负载（0.0001 mol％）铜催化的偶联容易地制备。值得注意的是，该反应可以在水中进行而无需使用任何助溶剂，并且可以良好的收率获得所需的1，3-烯炔。在催化反应中，配体促进作用是显着的。
• Synthesis of α,ω-Diarylbutadienes and -Hexatrienes via Decarboxylative Coupling of Cinnamic Acids with Vinyl Bromides under Palladium Catalysis
  作者：Mana Yamashita、Koji Hirano、Tetsuya Satoh、Masahiro Miura

  DOI：10.1021/ol9027896

  日期：2010.2.5

  Readily available cinnamic acid derivatives such as ferulic acid couple with β-bromostyrenes and 1-bromo-4-phenylbutadiene under palladium catalysis accompanied by decarboxylation to produce the corresponding α,ω-diarylbutadienes and -hexatrienes, respectively. Some of the products exhibit solid-state fluorescence.

  易得的肉桂酸衍生物（如阿魏酸）在钯催化下与β-溴苯乙烯和1-溴-4-苯基丁二烯偶合，并伴随脱羧反应分别生成相应的α，ω-二芳基丁二烯和-己三烯。一些产品表现出固态荧光。
• Multifunctional aldose reductase inhibitors based on 2H-benzothiazine 1,1-dioxide
  作者：Zhongfei Han、Xin Hao、Zehong Gao、Bing Ma、Changjin Zhu

  DOI：10.1039/c5ra25984c

  日期：——

  complications. A number of derivatives having a phenolic hydroxyl-substituted N2-aromatic side chain and a C4-acetic acid head group on the core structure were found to be potent and selective aldose reductase inhibitors. 8a with a phenolic 4-hydroxyl at N2-styryl side chain was proved to be the most active with an IC50 value of 0.094 μM. All compounds with the N2-styryl side chain showed good antioxidant

  设计并合成了一系列苯并噻嗪衍生物，用于开发糖尿病并发症的候选药物。发现许多在核心结构上具有酚羟基取代的N 2-芳族侧链和C 4-乙酸头基的衍生物是有效的和选择性的醛糖还原酶抑制剂。在N2-苯乙烯基侧链上带有酚4-羟基的8a被证明是活性最高的IC 50值为0.094μM。使用DPPH自由基清除试验，所有具有N 2-苯乙烯基侧链的化合物均显示出良好的抗氧化活性，其中，具有酚羟基取代的N 2-苯乙烯基的化合物在抑制ALR2和抗氧化方面均有效。结果表明基于苯并噻嗪骨架的多功能醛糖还原酶抑制剂的开发成功。