3-溴甲苯

化合物

3-溴甲苯是一種有機化合物,化學式為C7H7Br,是溴甲苯的同分異構體之一。

3-溴甲苯
3-溴甲苯的結構式
別名 間溴甲苯
3-甲基溴苯
識別
CAS號 591-17-3  checkY
PubChem 11560
SMILES
 
  • CC1=CC(=CC=C1)Br
性質
化學式 C7H7Br
摩爾質量 171.03 g·mol−1
外觀 無色液體
密度 1.4022 g·cm−3(25 °C)[1]
熔點 −39.8 °C(233.3 K)[2]
沸點 183.7 °C(456.8 K)[2]
溶解性 難溶
若非註明,所有數據均出自標準狀態(25 ℃,100 kPa)下。

合成

編輯

3-溴甲苯可由3-溴苯甲醛碳催化劑存在下被氫氣還原得到,[3]或通過3-甲基苯胺的重氮化-溴化反應製得。[4]3-甲基苯肼鹽酸鹽和三溴化硼二甲基亞碸中反應,也可以得到3-溴甲苯。[5]

反應

編輯

3-溴甲苯和苯硼酸可以發生鈴木偶聯反應(C–C偶聯),生成3-甲基聯苯:[6]

 

類似地,在三(二亞苄基丙酮)二鈀催化下,它和格氏試劑可以發生熊田偶聯反應,如和4-甲氧基苯基溴化鎂反應,得到3-甲基-4'-甲氧基聯苯。[7]該催化劑也可催化3-溴甲苯與胺的反應,如3-溴甲苯和哌啶在鹼的存在下反應,可以得到C–C偶聯產物1-(3-甲基苯基)哌啶。[8]

乙酸鈀三苯基膦可以催化其脫溴反應:[9]

 

它和氯磺酸三氯甲烷中反應,可以得到4-溴-2-甲苯磺酰氯。[10]它可以被氧氣過氧化叔丁醇等氧化劑催化氧化為3-溴苯甲酸[11][12][13]

參考文獻

編輯
  1. ^ Hussey, Allen S.; Dyer, John R. The Monomagnesium Derivatives of Dibromotoluenes. Journal of the American Chemical Society. 2002, 73 (2): 603–604. ISSN 0002-7863. doi:10.1021/ja01146a031. 
  2. ^ 2.0 2.1 "PhysProp" data were obtained from Syracuse Research Corporation of Syracuse, New York (US). Retrieved from SciFinder. [2021-07-11].
  3. ^ Wang, Shuguo; Zhou, Peng; Jiang, Liang; Zhang, Zehui; Deng, Kejian; Zhang, Yuhua; Zhao, Yanxi; Li, Jinlin; Bottle, Steven; Zhu, Huaiyong. Selective deoxygenation of carbonyl groups at room temperature and atmospheric hydrogen pressure over nitrogen-doped carbon supported Pd catalyst. Journal of Catalysis. 2018, 368: 207–216. ISSN 0021-9517. doi:10.1016/j.jcat.2018.10.017. 
  4. ^ Beletskaya, Irina; Sigeev, Alexander; Peregudov, Alexander; Petrovskii, Pavel. Catalytic Sandmeyer Bromination. Synthesis. 2007, 2007 (16): 2534–2538. ISSN 0039-7881. doi:10.1055/s-2007-983784. 
  5. ^ Phuc Tran, Dat; Nomoto, Akihiro; Mita, Soichiro; Dong, Chun-ping; Kodama, Shintaro; Mizuno, Takumi; Ogawa, Akiya. Metal- and base-free synthesis of aryl bromides from arylhydrazines. Tetrahedron Letters. 2020, 61 (23): 151959. ISSN 0040-4039. doi:10.1016/j.tetlet.2020.151959. 
  6. ^ Wang, Ai-E; Zhong, Jun; Xie, Jian-Hua; Li, Kai; Zhou, Qi-Lin. Highly Efficient Suzuki Cross-Coupling Catalyzed by Palladium/Phosphine-Imidazolium Carbene System. Advanced Synthesis & Catalysis. 2004, 346 (6): 595–598. ISSN 1615-4150. doi:10.1002/adsc.200404015. 
  7. ^ Pal, Anwesha; Ghosh, Raju; Adarsh, N.N.; Sarkar, Amitabha. Pyrazole-tethered phosphine ligands for Pd(0): useful catalysts for Stille, Kumada and Hiyama cross-coupling reactions. Tetrahedron. 2010, 66 (29): 5451–5458. ISSN 0040-4020. doi:10.1016/j.tet.2010.05.026. 
  8. ^ Mudithanapelli, Chandrashekar; Dhorma, Lama Prema; Kim, Mi-hyun. PIFA-Promoted, Solvent-Controlled Selective Functionalization of C(sp2)–H or C(sp3)–H: Nitration via C–N Bond Cleavage of CH3NO2, Cyanation, or Oxygenation in Water. Organic Letters. 2019, 21 (9): 3098–3102. ISSN 1523-7060. doi:10.1021/acs.orglett.9b00751. 
  9. ^ Chen, Jingbo; Zhang, Yushun; Yang, Liquan; Zhang, Xiang; Liu, Jianping; Li, Liang; Zhang, Hongbin. A practical palladium catalyzed dehalogenation of aryl halides and α-haloketones. Tetrahedron. 2007, 63 (20): 4266–4270. ISSN 0040-4020. doi:10.1016/j.tet.2007.03.061. 
  10. ^ Chen, Qiao-Hong; Rao, P.N. Praveen; Knaus, Edward E. Design, synthesis, and biological evaluation of N-acetyl-2-carboxybenzenesulfonamides: a novel class of cyclooxygenase-2 (COX-2) inhibitors. Bioorganic & Medicinal Chemistry. 2005, 13 (7): 2459–2468. ISSN 0968-0896. doi:10.1016/j.bmc.2005.01.039. 
  11. ^ Zheng, Kun; Yan, Xiaoyu; Zhang, Guofu; Yan, Xinhuan; Li, Xiaoqing; Xu, Xiangsheng. Photoinduced Carbon Tetrabromide Initiated Aerobic Oxidation of Substituted Toluenes to Carboxylic Acids. Synlett. 2019, 31 (03): 272–274. ISSN 0936-5214. doi:10.1055/s-0039-1691534. 
  12. ^ Ozen, Recep. Pyridinium Chlorochromate Catalyzed Oxidation of Toluenes to Aromatic Carboxylic Acids with Molecular Oxygen in Sub-critical Water. Asian Journal of Chemistry. 2014, 26 (3): 941–942. ISSN 0970-7077. doi:10.14233/ajchem.2014.16651. 
  13. ^ Mohammadpour, Pegah; Safaei, Elham. Catalytic C–H aerobic and oxidant-induced oxidation of alkylbenzenes (including toluene derivatives) over VO2+ immobilized on core–shell Fe3O4@SiO2 at room temperature in water. RSC Advances. 2020, 10 (40): 23543–23553. ISSN 2046-2069. doi:10.1039/D0RA03483E.