(2-bromo-4-methylphenyl)acetaldehyde | 1241405-24-2

• 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: (2-bromo-4-methylphenyl)acetaldehyde
• 英文别名: 2-(2-Bromo-4-methylphenyl)acetaldehyde；2-(2-bromo-4-methylphenyl)acetaldehyde
• CAS: 1241405-24-2
• 化学式: C₉H₉BrO
• 分子量: 213.074
• InChiKey: NRMGJPRMQFGLRJ-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.4
• 重原子数：
  11
• 可旋转键数：
  2
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.22
• 拓扑面积：
  17.1
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  (2-bromo-4-methylphenyl)acetaldehyde 在 tripropylammonium fluorochromate (VI) 、 高碘酸 、 碳酸氢钠 、 盐酸 作用下， 以 乙腈 、 二氯甲烷 、 水 为溶剂， 反应 2.0h， 以88.3%的产率得到2-(2-bromo-4-methylphenyl)acetic acid
  参考文献：
  名称：

  Properties and Synthesis of 2-{2-Fluoro (or Bromo)-4-[(2-oxocyclopentyl)methyl]phenyl}propanoic Acid: Nonsteroidal Anti-inflammatory Drugs with Low Membrane Permeabilizing and Gastric Lesion-Producing Activities

  摘要：

  We previously proposed that membrane permeabilization activity of NSAIDs is involved in NSAID-induced gastric lesions. We here synthesized derivatives of loxoprofen that have lower membrane permeabilization activity than other NSAIDs. Compared to loxoprofen, the derivatives 10a and 10b have lower membrane permeabilization activity and their oral administration produced fewer gastric lesions but showed an equivalent anti-inflammatory effect. These results suggest that 10a and 10b are likely to be therapeutically beneficial as safer NSAIDs.

  DOI：

  10.1021/jm101116s
• 作为产物：
  描述：

  2-溴-4-甲基苯甲醛 在 盐酸 作用下， 以 四氢呋喃 、 丙酮 为溶剂， 反应 6.0h， 生成 (2-bromo-4-methylphenyl)acetaldehyde
  参考文献：
  名称：

  分子内还原镍催化立体选择性合成鬼臼木核

  摘要：

  镍催化还原还原级联的非对映体控制的THN [2,3-c]呋喃。温和的反应条件导致了宽泛的官能团的耐受性，这些官能团几乎可以以良好的产率置于该骨架的每个位置。还提出了在串联环化偶联过程中观察到的反式或顺式融合选择性的构象控制。

  DOI：

  10.1039/c8cc00001h

文献信息

• [EN] ALKALOID ESTER AND CARBAMATE DERIVATIVES AND MEDICINAL COMPOSITIONS THEREOF<br/>[FR] DÉRIVÉS D'ALCALOÏDE ESTER ET CARBAMATE, ET COMPOSITIONS MÉDICINALES À BASE DE CEUX-CI
  申请人：CHIESI FARMA SPA

  公开号：WO2012146515A1

  公开（公告）日：2012-11-01

  The present invention relates to compounds acting as muscarinic receptor antagonists, to methods of preparing such derivatives, to compositions comprising them and therapeutic use thereof.

  本发明涉及作为毒蕈碱受体拮抗剂的化合物，制造此类衍生物的方法，包含它们的组合物以及它们的治疗用途。
• [EN] 2-PHENYL OR 2-HETARYL IMIDAZOL[1,2-a]PYRIDINE DERIVATIVES<br/>[FR] DÉRIVÉS DE 2-PHÉNYL- OU 2-HÉTARYL-IMIDAZOL[1,2-A]PYRIDINE
  申请人：HOFFMANN LA ROCHE

  公开号：WO2014177458A1

  公开（公告）日：2014-11-06

  The invention relates to compounds of formulas I and II, formula I or formula II wherein R1 is hydrogen, lower alkyl, lower alkoxy, halogen, S-lower alkyl, lower alkoxy substituted by halogen, di-lower alkyl amino, C(O)O-lower alkyl, lower alkyl substituted by hydroxy or hydroxy; R2 is hydrogen, lower alkyl, halogen, lower alkoxy, S-lower alkyl, lower alkoxy substituted by halogen, O(CH2)2-lower alkoxy substituted by halogen, di-lower alkyl amino, alkyl amino, NH-lower alkyl substituted by halogen, N(lower alkyl)-benzyl, lower alkyl substituted by hydroxy, heterocycloalkyl optionally substituted by halogen, CH2-lower alkoxy, CH2-lower alkoxy substituted by halogen or hydroxy; or R1 and R2 form together with the carbon atoms to which they are attached a ring containing -OCH2CH2O-, OCH2O-, OCH2CH2CH2O- or -NHC(O)CH2O-; R3 is hydrogen or lower alkoxy; R4 is hydrogen or lower alkyl; R5 is lower alkyl, cycloalkyl, lower alkyl substituted by hydroxy or lower alkyl substituted by halogen; or R4 and R5 form together with the nitrogen atom to which they are attached a ring containing -CH2CH2CHRCH2CH2-, -CH2CHRCH2CH2-, -CH2CH2OCH2CH2-, -CH2CH2NR'CH2CH2-, CH2CHR- or -CH2CH2CH2-; wherein R is hydrogen, halogen, lower alkyl, lower alkoxy or lower alkyl substituted by halogen; R' is lower alkyl substituted by halogen; Ra is hydrogen or H; Rb is hydrogen, hydroxy or 3H; R6 is hydrogen, halogen or lower alkyl; HetAr is selected from the group consisting of thiophenyl, furanyl, thiozolyl, benzofuranyl, pyrazolyl, benzoimidazolyl or pyridinyl; n is 1 or 2; or to a pharmaceutically acceptable acid addition salt, to a racemic mixture or to its corresponding enantiomer and/or optical isomers thereof. The present compounds are suitable as imaging tool, which will improve diagnosis by identifying potential patients with excess of tau aggregates in the brain, which may be likely to develop Alzheimer's disease.

  本发明涉及式I和式II的化合物，式I或式II中，R1为氢、低级烷基、低级烷氧基、卤素、S-低级烷基、卤素取代的低级烷氧基、二-低级烷基氨基、C(O)O-低级烷基、羟基取代的低级烷基或羟基；R2为氢、低级烷基、卤素、低级烷氧基、S-低级烷基、卤素取代的低级烷氧基、O(CH2)2-卤素取代的低级烷氧基、二-低级烷基氨基、烷基氨基、NH-卤素取代的低级烷基、N(低级烷基)-苄基、羟基取代的低级烷基、任选卤素取代的杂环烷基、CH2-低级烷氧基、CH2-卤素或羟基取代的低级烷氧基；或者R1和R2与其所连接的碳原子一起形成含有-OCH2CH2O-、OCH2O-、OCH2CH2CH2O-或-NHC(O)CH2O-的环；R3为氢或低级烷氧基；R4为氢或低级烷基；R5为低级烷基、环烷基、羟基取代的低级烷基或卤素取代的低级烷基；或者R4和R5与其所连接的氮原子一起形成含有-CH2CH2CHRCH2CH2-、-CH2CHRCH2CH2-、-CH2CH2OCH2CH2-、-CH2CH2NR'CH2CH2-、CH2CHR-或-CH2CH2CH2-的环；其中R为氢、卤素、低级烷基、低级烷氧基或卤素取代的低级烷基；R'为卤素取代的低级烷基；Ra为氢或H；Rb为氢、羟基或3H；R6为氢、卤素或低级烷基；HetAr选自噻吩基、呋喃基、噻唑基、苯并呋喃基、吡唑基、苯并咪唑基或吡啶基；n为1或2；或为药学上可接受的酸加成盐、外消旋混合物或其相应的对映体和/或光学异构体。本发明的化合物适合作为成像工具，通过识别大脑中tau聚集体过量的潜在患者，将有助于改善诊断，这些患者可能发展为阿尔茨海默病。
• Stereoselective synthesis of a <i>Podophyllum</i> lignan core by intramolecular reductive nickel-catalysis
  作者：Jian Xiao、Xiao-Wei Cong、Gui-Zhen Yang、Ya-Wen Wang、Yu Peng

  DOI：10.1039/c8cc00001h

  日期：——

  A Ni-catalyzed reductive cascade to a diastereocontrolled construction of THN[2,3-c]furan, is developed. The mild reaction conditions led to the tolerance of broad functional groups that can be placed in almost every position of this skeleton with good yields. The conformational control for the observed trans- or cis-fused selectivity during this tandem cyclization-coupling is also proposed.

  镍催化还原还原级联的非对映体控制的THN [2,3-c]呋喃。温和的反应条件导致了宽泛的官能团的耐受性，这些官能团几乎可以以良好的产率置于该骨架的每个位置。还提出了在串联环化偶联过程中观察到的反式或顺式融合选择性的构象控制。
• Copper(I) Bromide-Catalyzed Carbonylative Coupling of Aryl Halides with Phenols, Alcohols and Amines using Sodium Cyanide as C₁Source: A Synthesis of Carboxylic Acid Derivatives
  作者：Pragati K Prasad、Arumugam Sudalai

  DOI：10.1002/adsc.201301155

  日期：2014.7.7

  A new “carbon monoxide‐free” synthesis of carboxylate derivatives via carbonylative coupling of aryl bromides with phenols, alcohols, amines and acids in the presence of copper(I) bromide as catalyst and sodium cyanide in a stoichiometric amount has been developed. Its intramolecular version provides for the preparation of lactones (e.g., isochroman‐1‐ones and isobenzfuranones), imides, anhydrides

  已经开发出一种新的“无一氧化碳”羧酸酯衍生物的合成方法，该方法是在溴化铜（I）和化学计量的氰化钠存在下，通过芳基溴化物与苯酚，醇，胺和酸的羰基化偶联进行的。其分子内版本可制备内酯（例如，异色满-1-酮和异苯并呋喃酮），酰亚胺，酸酐和内酰胺，收率极高（73-96％）。
• <scp>Pd‐Catalyzed</scp> Asymmetric Intramolecular Arylative Dearomatization of <scp> <i>para</i> ‐Aminophenols </scp> ^<b>†</b>
  作者：Ren‐Qi Xu、Ping Yang、Chao Zheng、Shu‐Li You

  DOI：10.1002/cjoc.202000109

  日期：2020.7

  Asymmetric arylative dearomatization reactions of para ‐aminophenols are realized by a Pd‐catalyst consisting of a TADDOL (α,α,α',α'‐tetraaryl‐2,2‐disubstituted 1,3‐dioxolane‐4,5‐dimethanol)‐derived chiral phosphoramidite ligand. The tetracyclic products bearing the key skeleton of Erythrina alkaloids are afforded in reasonable yields (up to 73%) with good to excellent enantioselectivity (up to 97% ee).

  对氨基苯酚的不对称芳基脱芳香化反应是通过由TADDOL（α，α，α'，α'-四芳基-2,2-二取代的1,3-二氧戊环-4,5-二甲醇）组成的Pd催化剂实现的。衍生的手性亚磷酰胺配体。带有赤藓生物碱关键骨架的四环产物以合理的收率（高达73％）和良好至优异的对映选择性（高达97％ee）提供。通过将此方法用作关键步骤，可以实现（–）-3-去甲氧基赤藓丁酮的精确全合成。