2-(p-bromophenyl)-1,2-propanediol | 171417-14-4

• 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-(p-bromophenyl)-1,2-propanediol
• 英文别名: 2-(p-Bromphenyl)-propan-1,2-diol；2-(4-bromophenyl)propane-1,2-diol
• CAS: 171417-14-4
• 化学式: C₉H₁₁BrO₂
• 分子量: 231.089
• InChiKey: QSSPOQOHIKXTNW-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.3
• 重原子数：
  12
• 可旋转键数：
  2
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.33
• 拓扑面积：
  40.5
• 氢给体数：
  2
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  2-(p-bromophenyl)-1,2-propanediol 在 platinum on activated charcoal 、 水 、 氧气 、 碳酸氢钠 作用下， 生成 2-(4-溴苯基)-2-羟基丙酸
  参考文献：
  名称：

  Stereospecific Decarboxylative Allylation of Sulfones

  摘要：

  Allyl sulfonylacetic esters undergo highly stereospecific, palladium-catalyzed decarboxylative allylation. The reaction allows the stereospecific formation of tertiary homoallylic sulfones in high yield. In contrast to related reactions that proceed at -100 degrees C and require highly basic preformed organometallics, the decarboxylative coupling described herein occurs under mild nonbasic conditions and requires no stoichiometric additives. Allylation of the intermediate a-sulfonyl anion is more rapid than racemization, leading to a highly enantiospecific process. Density functional theory calculations indicate that the barrier for racemization is 9.9 kcal/mol, so the barrier for allylation must be <9.9 kcal/mol.

  DOI：

  10.1021/ja104196x
• 作为产物：
  描述：

  1-bromo-4-(1-methoxyprop-1-en-2-yl)-benzene 在 sodium tetrahydroborate 、 N-(4-nitrobenzenesulfonyl)-3,3-dimethyloxaziridine 、 C₂₅H₂₆N₂O 、 氢溴酸 、 碳酸氢钠 、 三氟乙酸 作用下， 以 四氢呋喃 、 甲醇 、 水 、 丙酮 为溶剂， 反应 47.5h， 生成 2-(p-bromophenyl)-1,2-propanediol
  参考文献：
  名称：

  A Simple Primary Amine Catalyst for Enantioselective α-Hydroxylations and α-Fluorinations of Branched Aldehydes

  摘要：

  A new primary amine catalyst for the asymmetric a-hydroxylation and a-fluorination of alpha-branched aldehydes is described. The products of the title transformations are generated in excellent yields with high enantioselectivities. Both processes can be performed within short reaction times and on gram scale. The similarity in results obtained in both reactions, combined with computational evidence, implies a common basis for stereoinduction and the possibility of a general catalytic mechanism for a-functionalizations. Promising initial results in alpha-amination and alpha-chlorination reactions support this hypothesis.

  DOI：

  10.1021/acs.orglett.5b01193

文献信息

• Heterogeneous carbon nitride photocatalyst for C–C bond oxidative cleavage of vicinal diols in aerobic micellar medium
  作者：Tengfei Niu、Shengjun Chen、Mei Hong、Tianhao Zhang、Jiayang Chen、Xinyu Dong、Bangqing Ni

  DOI：10.1039/d0gc01727b

  日期：——

  A green and efficient visible-light promoted aerobic oxidative C–C bond cleavage of vicinal diols in micellar medium has been developed. This protocol used graphitic carbon nitride with nitrogen vacancies (CN620) as a metal-free recyclable photocatalyst and CTAB as surfactant in water. Control experiments and the ESR results indicated that superoxide radicals and valence band holes played an important

  已经开发了绿色高效的可见光促进胶束介质中邻二醇的好氧氧化C–C键裂解。该协议使用具有氮空位的石墨氮化碳（CN620）作为无金属可循环使用的光催化剂，而CTAB作为水中的表面活性剂。对照实验和ESR结果表明，超氧自由基和价带孔在反应中起重要作用。进一步的同位素实验提出了反应的β-分裂/ HAT途径和氧化/水解/脱水途径，这与以前的报道不同。半导体/胶束催化剂体系可以循环使用至少10次，而不会显着降低活性。此外，
• Microbiological Transformations 43. Epoxide Hydrolases as Tools for the Synthesis of Enantiopure α-Methylstyrene Oxides:  A New and Efficient Synthesis of (<i>S</i>)-Ibuprofen
  作者：M. Cleij、A. Archelas、R. Furstoss

  DOI：10.1021/jo982101+

  日期：1999.7.1

  the enantioselectivity of these biohydrolyses strongly depends on the nature of the enzyme and of the substituent. Using some of these enzymes, this approach allows to prepare these epoxides in high optical purity. The potentiality to perform efficient preparative-scale resolution using such a biocatalyst was illustrated by the four-step synthesis of (S)-ibuprofen, a nonsteroidal antiinflammatory drug

  使用来自不同来源的 10 种环氧化物水解酶研究了在芳环上不同取代的各种 α-甲基苯乙烯氧化物衍生物的生物水解。我们的结果表明，这些生物水解的对映选择性在很大程度上取决于酶和取代基的性质。使用这些酶中的一些，该方法允许以高光学纯度制备这些环氧化物。(S)-布洛芬是一种非甾体抗炎药和家用止痛药，是全球销量前十的药物之一，其四步合成说明了使用这种生物催化剂进行高效制备级拆分的潜力。使用组合化学酶促策略，
• [EN] CYCLOALKYL NITRILE PYRAZOLO PYRIDONES AS JANUS KINASE INHIBITORS<br/>[FR] CYCLOALKYLNITRILE PYRAZOLOPYRIDONES UTILISÉES COMME INHIBITEURS DE LA JANUS KINASE
  申请人：MERCK SHARP & DOHME

  公开号：WO2014146490A1

  公开（公告）日：2014-09-25

  Compounds of formula I are provided, which are JAK inhibitors and are useful for the treatment of JAK-mediated diseases such as rheumatoid arthritis, asthma, COPD and cancer.

  公式I的化合物被提供，这些化合物是JAK抑制剂，对于治疗JAK介导的疾病，如类风湿性关节炎、哮喘、慢性阻塞性肺病（COPD）和癌症等疾病是有用的。
• Visible light-promoted dihydroxylation of styrenes with water and dioxygen
  作者：Bo Yang、Zhan Lu

  DOI：10.1039/c7cc06745c

  日期：——

  The first efficient visible light promoted metal-free dihydroxylation of styrenes with water and dioxygen has been developed for the construction of vicinal alcohols. The protocol was operationally simple with broad substrate scope. The mechanistic studies demonstrated that one of the hydroxyl group came from water and the other one came from molecular oxygen. Additionally, the ß-alkyoxy alcohols could

  已经开发出第一种有效的可见光促进苯乙烯与水和双氧的无金属二羟基化反应，用于邻位醇的构建。该协议操作简单，具有广泛的底物范围。机理研究表明，一个羟基来自水，另一个羟基来自分子氧。另外，还可以使用类似的策略获得β-烷氧基醇。
• Photo‐Induced Dihydroxylation of Alkenes with Diacetyl, Oxygen, and Water
  作者：Yusuke Masuda、Daichi Ikeshita、Masahiro Murakami

  DOI：10.1002/hlca.202000228

  日期：2021.3

  Herein reported is a photo‐induced production of vicinal diols from alkenes under mild reaction conditions. The present dihydroxylation method using diacetyl (= butane‐2,3‐dione), oxygen, and water dispenses with toxic reagents and intractable waste generation.

  本文报道的是在温和的反应条件下从烯烃光诱导生产邻二醇。目前使用二乙酰（=丁烷-2,3-二酮），氧​​气和水的二羟基化方法可免除有毒试剂并产生难处理的废物。