N-(3-bromo-4-hydroxyphenyl)acetamide | 6329-78-8

• 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: N-(3-bromo-4-hydroxyphenyl)acetamide
• 英文别名: 3-bromo-4-hydroxyacetanilide；4-hydroxy-3-bromoacetanilide；acetic acid-(3-bromo-4-hydroxy-anilide)；Essigsaeure-(3-brom-4-hydroxy-anilid)；2-Brom-4-acetamino-phenol；4-Acetamido-2-bromophenol
• CAS: 6329-78-8
• 化学式: C₈H₈BrNO₂
• 分子量: 230.061
• InChiKey: YZUMPSIXWJTNQM-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.7
• 重原子数：
  12
• 可旋转键数：
  1
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.12
• 拓扑面积：
  49.3
• 氢给体数：
  2
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  N-(3-bromo-4-hydroxyphenyl)acetamide 在 三氟化硼甲醇络合物 、 亚硝酸特丁酯 作用下， 以 甲醇 为溶剂， 以80%的产率得到3-bromo-4-hydroxyphenyldiazonium tetrafluoroborate
  参考文献：
  名称：

  与4-苯基重氮鎓盐的Mizoroki-Heck反应

  摘要：

  在其他条件相同的条件下，使用4-苯酚重氮盐代替O-烷基化类似物，在Mizoroki-Heck反应中获得了明显更高的收率。我们发现，从扑热息痛或扑热息痛衍生的对乙酰苯胺开始的一烧瓶式脱乙酰化-重氮化反应-沉淀序列为获得所需的重氮四氟硼酸盐提供了便利。这些芳基化剂在钯催化的CC键形成反应中的实用性已被证明可用于一瓶合成药物阿立哌唑的杂环核心。值得注意的是，由乙苯胺形成的重氮盐可与两个Pd催化的步骤以一个烧瓶的顺序合并，而无需任何溶剂交换或中间体分离。

  DOI：

  10.1002/adsc.201000493
• 作为产物：
  描述：

  对乙酰氨基酚 在 aluminum (III) chloride 、 溴 作用下， 以 二氯甲烷 为溶剂， 反应 12.5h， 以91%的产率得到N-(3-bromo-4-hydroxyphenyl)acetamide
  参考文献：
  名称：

  与4-苯基重氮鎓盐的Mizoroki-Heck反应

  摘要：

  在其他条件相同的条件下，使用4-苯酚重氮盐代替O-烷基化类似物，在Mizoroki-Heck反应中获得了明显更高的收率。我们发现，从扑热息痛或扑热息痛衍生的对乙酰苯胺开始的一烧瓶式脱乙酰化-重氮化反应-沉淀序列为获得所需的重氮四氟硼酸盐提供了便利。这些芳基化剂在钯催化的CC键形成反应中的实用性已被证明可用于一瓶合成药物阿立哌唑的杂环核心。值得注意的是，由乙苯胺形成的重氮盐可与两个Pd催化的步骤以一个烧瓶的顺序合并，而无需任何溶剂交换或中间体分离。

  DOI：

  10.1002/adsc.201000493

文献信息

• METHOD FOR PRODUCING A CROSS-COUPLING PRODUCT OF A BENZENOID DIAZONIUM SALT
  申请人：Boege Nicolas

  公开号：US20130053598A1

  公开（公告）日：2013-02-28

  The invention relates to a method for producing a cross-coupling product of a benzenoid dizonium salt according to the general formula (I), wherein the groups R 1 , R 2 , R 3 , R 4 , and R 5 represent hydrogen, halogen, an alkyl, alkenyl, aryl, alkoxy, aryloxy, nitro, cyano, hydroxy, acetyl, and/or diazo groups independently of each, and X represents BF 4 , Cl, F, SO 3 CH 3 , CO 2 CH 3 , PF 6 , ClO 2 CH 3 , or CIO 4 , comprising the following steps: (a) providing a benzenoid amide, which with the exception of the diazo function has the same substituents R 1 , R 2 , R 3 , R 4 , and R 5 as the benzenoid diazonium salt of the general formula (I), and hydrolytically cleaving the amide to form an amine or providing a corresponding amine, (b) diazotizing the amine thus obtained or provided with a nitrite, and (c) subsequently reacting the benzenoid diazonium salt with a coupling partner in the presence of a catalyst to form a cross-coupling product, wherein the coupling parter is represented by the general formula (II), R 6 , R 7 , and R 8 are the same or different and represent hydrogen, carboxyalkyl groups, carboxyaryl groups, alkyl groups, aryl groups, alkoxy groups, aryloxy groups, wherein the groups can each contain Si, N, S, O, and or halogen atoms, or R 6 and R 7 with the double bound form an aromatic ring, which can be provided with R 8 and one to four further substituents, independently of each other, selected from the group comprising a straight-chain or branched (C 1 -C 6 ) alkyl group, a (C 3 -C 7 ) cycloalkyl group, a straight-chain or branched (C 1 -C 6 ) alkenyl group, a straight-chain or branched (C 1 -C 6 ) alkyoxy group, halogen, the hydroxy group, an amino, di(C 1 -C 6 ) alkylamino, nitro, acetyl, cyan, benzyl, 4-methoxybenzyl, 4-nitrobenzyl, phenyl, and 4-methoxyphenyl group and represents Y=H, —B(OR) 2 , —SnR 3 , —ZnR, —SiR 3 , or Mg (halogen), and wherein at least the steps (b) and (c) are performed without intermediate isolation of an intermediate product. According to said method, cross-couplings can be performed more simply and with improved yield without the hydroxyl group in aromatic reactants containing hydroxyl groups having to be provided with a protective group.

  该发明涉及一种根据通式(I)制备苯并重氮盐的交叉偶联产物的方法，其中基团R1、R2、R3、R4和R5代表氢、卤素、烷基、烯基、芳基、烷氧基、芳氧基、硝基、氰基、羟基、乙酰基和/或重氮基，X代表BF4、Cl、F、SO3CH3、CO2CH3、PF6、ClO2CH3或CIO4，包括以下步骤：(a)提供苯并酰胺，除了重氮功能外，具有通式(I)中苯并重氮盐相同的取代基R1、R2、R3、R4和R5，并水解裂解酰胺形成胺或提供相应的胺，(b)用亚硝酸盐重氮得到或提供的胺，(c)随后在催化剂存在下将苯并重氮盐与偶联配体反应形成交叉偶联产物，其中偶联配体由通式(II)表示，R6、R7和R8相同或不同，代表氢、羧基烷基、羧基芳基、烷基、芳基、烷氧基、芳氧基，其中基团可以包含Si、N、S、O和/或卤素原子，或R6和R7与双键形成芳香环，可提供R8和一个到四个进一步取代基，独立于彼此，选自包括直链或支链(C1-C6)烷基、(C3-C7)环烷基、直链或支链(C1-C6)烯基、直链或支链(C1-C6)烷氧基、卤素、羟基、氨基、二(C1-C6)烷基氨基、硝基、乙酰基、氰基、苄基、4-甲氧基苄基、4-硝基苄基、苯基和4-甲氧基苯基，表示Y=H、—B(OR)2、—SnR3、—ZnR、—SiR3或Mg(卤素)，至少步骤(b)和(c)在不中间分离中间产物的情况下执行。根据该方法，可以更简单地进行交叉偶联，并且在含有羟基的芳香反应物中无需提供保护基即可获得改进的产率。
• A Deacetylation-Diazotation-Coupling Sequence: Palladium- Catalyzed CC Bond Formation with Acetanilides as Formal Leaving Groups
  作者：Bernd Schmidt、René Berger

  DOI：10.1002/adsc.201200929

  日期：2013.2.1

  Acetanilides can be deacetylated and diazotized in situ, and subsequently used in Pd-catalyzed coupling reactions without isolation of the diazonium intermediate. Heck reactions, Suzuki cross-coupling reactions, and a Pd-catalyzed [2+2+1] cycloaddition have been investigated as terminating CC bond-forming steps of this one-flask sequence. The sequence does not require the exchange of solvents or removal

  乙酰苯胺可以原位脱乙酰化和重氮化，然后在不分离重氮中间体的情况下用于Pd催化的偶联反应中。Heck反应，Suzuki交叉偶联反应和Pd催化的[2 + 2 + 1]环加成反应已作为该一瓶序列的终止CC键形成步骤进行了研究。该顺序不需要在各个步骤之间交换溶剂或除去副产物，而是在适当的时候通过添加试剂和催化剂来进行。
• Therapeutic amines
  申请人：Zeneca Limited

  公开号：US05866611A1

  公开（公告）日：1999-02-02

  Compounds of formula I, and their pharmaceutically acceptable salts, ##STR1## in which R.sup.1 and R.sup.2 are hydrogen, alkyl, cycloalkyl, cycloalkylalkyl, phenylalkyl or alkenyl; or NR.sup.1 R.sup.2 is a heterocyclic group; A is trimethylene optionally substituted by alkyl and the phenyl ring is optionally substituted by substituents such as halogeno, alkenyl, amino, cyano, ureido, alkyl, carbamoylalkyl, alkanoylamino, alkoxycarbonyl, N-alkyl-alkanoylamino, alkanoyl and amines thereof; are inhibitors of squalene synthese and hence useful in treating diseases in which a lowering of cholesterol is desirable. As well as the use of these compounds in medicine, novel compounds, processes for their preparation and pharmaceutical compositions are also referred to.

  式I的化合物及其药学上可接受的盐，其中R.sup.1和R.sup.2分别为氢、烷基、环烷基、环烷基烷基、苯基烷基或烯基；或NR.sup.1 R.sup.2是杂环基团；A是可选择地由烷基取代的三亚甲基，苯环可选择地由卤素、烯基、氨基、氰基、脲基、烷基、碳酰胺基烷基、烷酰氨基、烷氧羰基、N-烷基-烷酰氨基、烷酰基及其胺基取代基取代；这些化合物是角鲨烯合成酶的抑制剂，因此在治疗降低胆固醇的疾病中有用。除了这些化合物在医学上的用途外，还提到了新颖的化合物、其制备方法和药物组合物。
• NOVEL COMPOUND AND PHARMACOLOGICALLY ACCEPTABLE SALT THEREOF
  申请人：MEIJI SEIKA PHARMA CO., LTD.

  公开号：US20190322686A1

  公开（公告）日：2019-10-24

  A compound represented by the general formula (1) below or a pharmacologically acceptable salt thereof: [In the formula (1), R 1 and R 2 may be the same or different and each represents a hydrogen atom, a halogen atom, a hydroxyl group, a carboxy group, a cyano group, an optionally substituted C 1-6 alkyl group et al.; R 3 represents a hydrogen atom; R 4 represents an optionally substituted 4- to 10-membered monocyclic heterocyclic group containing 1 to 4 heteroatoms selected from an oxygen atom, a nitrogen atom, and a sulfur atom; X represents a group represented by the following formula: —CH 2 —, —CH 2 —CH 2 —, —CH 2 —CH 2 —CH 2 —, or —CH 2 —O—CH 2 —; and Z represents a hydrogen atom or a hydroxyl group.]

  通用公式（1）表示的化合物或其药理学上可接受的盐：[在公式（1）中，R1和R2可以相同也可以不同，每个代表氢原子，卤原子，羟基，羧基，氰基，可选择地取代的C1-6烷基等；R3代表氢原子；R4代表可选择地取代的含有1至4个异原子（从氧原子，氮原子和硫原子中选择）的4至10元单环杂环基团；X代表以下式表示的基团：—CH2—，—CH2—CH2—，—CH2—CH2—CH2—，或—CH2—O—CH2—；Z代表氢原子或羟基。]
• Functionalized alkoxy arene diazonium salts from paracetamol
  作者：Bernd Schmidt、René Berger、Frank Hölter

  DOI：10.1039/b924619c

  日期：——

  as a convenient one-flask transformation with consecutive addition of the appropriate reagents. Exchange of solvents or removal of byproducts prior to isolation of the product is not required. The arene diazonium salts are isolated from the reaction mixture by simple filtration. Two complementary protocols are presented, and the utility of the reaction is exemplified for a synthesis of the diarylheptanoid

  芳族乙酰胺四氟硼酸酯可以由芳族乙酰胺经一系列的脱乙酰基，重氮化和沉淀（由阴离子交换诱导）合成。该反应以方便的一瓶转化进行，并连续添加适当的试剂。不需要在分离产物之前交换溶剂或除去副产物。通过简单的过滤从反应混合物中分离出芳烃重氮盐。提出了两种互补的方案，并举例说明了该反应用于合成二芳基庚烷天然产物去-O-甲基中心洛宾的方法。