7-chlorochromone | 101860-74-6

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 苯并吡喃
• 英文名称: 7-chlorochromone
• 英文别名: 7-chloro-4H-chromen-4-one；7-Chloro-4h-1-benzopyran-4-one；7-chlorochromen-4-one
• CAS: 101860-74-6
• 化学式: C₉H₅ClO₂
• 分子量: 180.59
• InChiKey: JQQABSXUHNBEPB-UHFFFAOYSA-N

物化性质

• 熔点：
  100-102 °C(Solv: ethanol (64-17-5))
• 沸点：
  290.9±40.0 °C(Predicted)
• 密度：
  1.399±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.4
• 重原子数：
  12
• 可旋转键数：
  0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  26.3
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  7-chlorochromone 在 甲酸 、 C₃₁H₃₅ClN₂O₂RhS^(1-) 、 sodium formate 作用下， 以 水 为溶剂， 反应 3.0h， 以99%的产率得到(4S)-7-chloro-3,4-dihydro-2H-chromen-4-ol
  参考文献：
  名称：

  Rh(II)-Cp∗–TsDPEN catalyzed aqueous asymmetric transfer hydrogenation of chromenones into saturated alcohol: CC and CO reduction in one step

  摘要：

  As an efficient catalyst for asymmetric transfer hydrogenation reaction (ATH reaction) of alpha,beta-unsaturated ketones, Rh-Cp*-TsDPEN (Cp* = 1,2,3,4,5-pentamethylcyclopenta-1,3-diene, TsDPEN = N-(p-toluenesulfonyl)-1,2-diphenyl- ethylenediamine) shows high chemoselectivity on C=O and C=C reduction. In our method, both C=O and C=C bonds in a variety of chromenone derivatives were reduced efficiently in aqueous media, resulting in at least 98% ee and up to 99% yields in a convenient way without further purification. The product was a useful intermediate for deriving chiral chroman-4-amine, which was reported as an effective agent against hypotension and inflammatory pain by inhibiting human bradykinin B1 receptor. (C) 2012 Published by Elsevier Ltd.

  DOI：

  10.1016/j.tetlet.2012.04.050
• 作为产物：
  描述：

  4'-氯-2'-羟基苯乙酮 、 N,N-二甲基甲酰胺二甲基缩醛 在 盐酸 作用下， 以 水 为溶剂， 生成 7-chlorochromone
  参考文献：
  名称：

  苯醌/ 3-氯苯甲酮与甲苯磺酰hydr的连续反应-取代基吡咯/ Chromeno [3,2- c ]吡唑的取代基定向合成

  摘要：

  开发了一种简便有效的合成策略，用于化学选择性合成单环/三环稠合的吡唑，并通过色酮上的不同3位取代基（H或Cl）进行定向。反应以一锅顺序的方式进行，具有广泛的底物范围并且产率中等至优异。

  DOI：

  10.1021/acs.joc.9b00282

文献信息

• Metal-free oxidative decarbonylative alkylation of chromones using aliphatic aldehydes
  作者：Rongzhen Chen、Jin-Tao Yu、Jiang Cheng

  DOI：10.1039/c8ob00720a

  日期：——

  A decarbonylative alkylation of chromones via radical conjugate addition under metal-free conditions was developed using aliphatic aldehydes as alkylating reagents. A series of 2-tertiary, secondary, and even primary alkylated chromanones were obtained in moderate to excellent yields.

  使用脂肪族醛作为烷基化试剂，开发了在无金属条件下通过自由基共轭加成反应实现色酮的脱羰基烷基化反应。以中等至优异的产率获得了一系列的2-叔，仲，甚至伯烷基化的发色酮。
• Ruthenium(II)-Catalyzed C–H Activation of Chromones with Maleimides to Synthesize Succinimide/Maleimide-Containing Chromones
  作者：Yan Zhou、Hong Liang、Yaoguang Sheng、Shaoli Wang、Yi Gao、Lingling Zhan、Zhilong Zheng、Mengjie Yang、Guang Liang、Jianmin Zhou、Jun Deng、Zengqiang Song

  DOI：10.1021/acs.joc.0c01223

  日期：2020.7.17

  efficient route for the coupling of maleimides with chromones at the C5-position has been developed under Ru(II) catalysis. It could provide 1,4-addition products and oxidative Heck-type products by switching additives. Benzoic acid led to the formation of 1,4-addition products under solvent-free conditions, and silver acetate was promoted to the generation of oxidative Heck-type products. Various maleimides

  在Ru（II）催化下，已经开发了马来酰亚胺与色酮在C5位偶联的有效途径。通过切换添加剂可以提供1，4-加成产物和氧化性Heck型产物。在无溶剂条件下，苯甲酸导致形成1，4-加成产物，乙酸银被促进生成氧化型Heck型产物。各种马来酰亚胺和色酮适合于该转化，在短的反应时间内以良好至优异的产率提供所需的产物。为了理解该反应的机理，已经进行了氘化研究和对照实验。
• NHC-catalyzed enantioselective C2-functionalization of 3-hydroxychromenones <i>via</i> α,β-unsaturated acyl azoliums
  作者：Krzysztof Dzieszkowski、Michał Słotwiński、Katarzyna Rafińska、Tadeusz M. Muzioł、Zbigniew Rafiński

  DOI：10.1039/d1cc03708k

  日期：——

  A novel synthetic method for enantioselective C2-functionalization of 3-hydroxychromenones promoted by N-heterocyclic carbenes via the formation of α,β-unsaturated acyl azolium intermediates, which occurs with Coates–Claisen rearrangement is established. This synthetic strategy enabled the rapid assembly of enantiomerically enriched δ-hydroxychromenone-derived esters/amides under mild conditions with

  建立了一种通过形成 α,β-不饱和酰基唑鎓中间体和 Coates-Claisen 重排的 N-杂环卡宾促进 3-羟基色酮对映选择性 C2 官能化的新合成方法。这种合成策略能够在温和条件下快速组装富含对映异构体的 δ-羟基色酮衍生酯/酰胺，并具有良好的产率和广泛的底物范围。
• DTBP-promoted site-selective α-alkoxyl C–H functionalization of alkyl esters: synthesis of 2-alkyl ester substituted chromanones
  作者：Jin-Tao Yu、Yiting Li、Rongzhen Chen、Zixian Yang、Changduo Pan

  DOI：10.1039/d1ob00605c

  日期：——

  The direct C–H functionalization of ethyl acetates was developed, delivering a variety of 1-(4-oxochroman-2-yl)ethyl acetate derivatives by reacting with chromones. This reaction has a wide substrate scope with excellent site-selective C–H activation at the inactive α-hydrogen of the alkoxyl group instead of the α-hydrogen of the carbonyl group under radical conditions. Compared with other protocols

  开发了乙酸乙酯的直接 C-H 官能化，通过与色酮反应产生各种 1-(4-oxochroman-2-yl) 乙酸乙酯衍生物。该反应具有广泛的底物范围，在自由基条件下，在烷氧基的非活性 α-氢而不是羰基的 α-氢上具有优异的位点选择性 C-H 活化。与烷基酯的 α-烷氧基 C-H 官能化的其他方案相比，该反应的一个显着特点是不需要金属催化剂，而 DTBP 作为唯一的氧化剂。
• Site-specific hydroxyalkylation of chromones <i>via</i> alcohol mediated Minisci-type radical conjugate addition
  作者：Rongzhen Chen、Jin-Tao Yu、Jiang Cheng

  DOI：10.1039/c8ob00392k

  日期：——

  A metal-free site-specific C2-hydroxyalkylation of chromones through the Minisci-type reaction using simple alcohols was developed. This transformation proceeds via radical sp3 C–H activation and subsequent conjugate addition, generating a series of C2-hydroxyalkylated chromanones in moderate to good yields. Besides, ethers were also compatible in this Minisci reaction, leading to corresponding C2

  通过使用简单的醇类的Minisci型反应，开发了色酮的无金属位点特定的C2-羟烷基化反应。该转化过程通过自由基sp 3 C–H活化和随后的共轭加成进行，以中等至良好的产率生成了一系列C2-羟烷基化的发色酮。此外，醚在该Minisci反应中也相容，从而导致相应的C 2醚取代的发色酮。