2,6-di-p-tolyl-4H-pyran-4-one | 18357-35-2

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡喃
• 英文名称: 2,6-di-p-tolyl-4H-pyran-4-one
• 英文别名: 2,6-Bis(4-methylphenyl)-4H-pyran-4-one；2,6-bis(4-methylphenyl)pyran-4-one
• CAS: 18357-35-2
• 化学式: C₁₉H₁₆O₂
• 分子量: 276.335
• InChiKey: MFNGJZJAIMYXNF-UHFFFAOYSA-N

物化性质

• 熔点：
  178 °C(Solv: ethanol (64-17-5))
• 沸点：
  490.6±45.0 °C(Predicted)
• 密度：
  1.163±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  4.1
• 重原子数：
  21
• 可旋转键数：
  2
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.11
• 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：

  2,6-di-p-tolyl-4H-pyran-4-one 在 氯磺酸 作用下， 反应 6.25h， 生成 2,6-bis[3-(propoxysulfonyl)-4-methylphenyl]-4H-pyran-4-one
  参考文献：
  名称：

  Synthesis of Mono- and Bis-chlorosulfonylarylpyrones and Related Sulfonates and Sulfonamides

  摘要：

  New 2,6-bis[(3-chlorosulfonyl-4-methyl)phenyl]-4H-pyran-4-one and 2-[(3-chlorosulfonyl-4-methyl)phenyl]-6-methyl-4H-pyran-4-one were synthesized by means of a reaction of chlorosulfonic acid with corresponding pyrones at 050 degrees C and were treated with various alcohols and primary and secondary alkyl and aryl amines to give the corresponding sulfonates 4a-e in 20-49% and sulfonamides 3a-l in 55-82% yields. GRAPHICAL ABSTRACT[image omitted].

  DOI：

  10.1080/10426507.2010.484904
• 作为产物：
  描述：

  1,6-bis(4-methylphenyl)hexane-1,3,4,6-tetraone 在 lead(IV) acetate 、 盐酸 、 溶剂黄146 作用下， 以 乙醇 为溶剂， 反应 31.0h， 生成 2,6-di-p-tolyl-4H-pyran-4-one
  参考文献：
  名称：

  Synthesis of some schiff bases of 3-aroyl-6-aryl-4-hydroxy-2H-pyran-2-ones

  摘要：

  The reaction of 3-aroyl-6-aryl-4-hydroxy-2H-pyran-2-ones (Ar = p-tolyl, 1,1'-biphenyl-4-yl or thienyl) with aniline and substituted o-phenylenediamine (R = H, CH3 or Cl) yields a series of new Schiff bases 2 a - f in 51 - 72% yield. Bromination of 1 a gave the 5-bromo derivative 1 c, while the compounds 1 a, 1 b, 2 b, 2e, and 2 f were converted into 2,6-diaryl-4 H-pyran-4-ones 3 a - c. All products have been fully characterized.

  DOI：

  10.1007/bf00812331

文献信息

• Regiodivergent Hydration–Cyclization of Diynones under Gold Catalysis
  作者：Marta Solas、Miguel A. Muñoz、Samuel Suárez-Pantiga、Roberto Sanz

  DOI：10.1021/acs.orglett.0c02892

  日期：2020.10.2

  Skipped diynones, efficiently prepared from biomass-derived ethyl lactate, undergo a tandem hydration–oxacyclization reaction under gold(I) catalysis. Reaction conditions have been developed for a switchable process that allows selective access to 4-pyrones or 3(2H)-furanones from the same starting diynones. Further application of this methodology in the total synthesis of polyporapyranone B was demonstrated

  由生物质衍生的乳酸乙酯有效制备的已跳过的二炔酮，在金（I）催化下经历了串联水合-氧环化反应。已经开发了用于可切换过程的反应条件，该过程允许从相同的起始二炔酮选择性地获得4-吡喃酮或3（2 H）-呋喃酮。证明了该方法在聚吡喃酮B的全合成中的进一步应用。
• Brønsted Acid Catalyzed and NIS-Promoted Cyclization of Diynones: Selective Synthesis of 4-Pyrone, 4-Pyridone, and 3-Pyrrolone Derivatives
  作者：Yi-Feng Qiu、Fang Yang、Zi-Hang Qiu、Mei-Jin Zhong、Li-Jing Wang、Yu-Ying Ye、Bo Song、Yong-Min Liang

  DOI：10.1021/jo402055a

  日期：2013.12.6

  Brønsted acid catalyzed tandem cyclization was found to be highly effective for the preparation of a series of polysubstituted 4-pyrones from diynones (yield up to 99%). 4-Pyridone and 3-pyrrolone derivatives were also selectively synthesized by employing NIS and/or Brønsted acid. NIS as an electrophilic reagent could promote these reactions efficiently and rapidly under very mild reaction conditions

  发现布朗斯台德酸催化的串联环化对于从二炔酮制备一系列多取代的4-吡喃酮非常有效（收率高达99％）。还通过使用NIS和/或布朗斯台德酸选择性地合成了4-吡啶酮和3-吡咯烷酮衍生物。NIS作为亲电子试剂可以在非常温和的反应条件下有效而迅速地促进这些反应。
• Synthesis of γ-pyrones via decarboxylative condensation of β-ketoacids
  作者：Jérémy Merad、Thomas Maier、Catarina A. B. Rodrigues、Nuno Maulide

  DOI：10.1007/s00706-016-1851-2

  日期：2017.1

  AbstractThis manuscript describes the convergent synthesis of aryl- and alkyl-disubstituted γ-pyrones from β-ketoacids. The reaction proceeds in the presence of trifluoromethanesulfonic anhydride via an unprecedented decarboxylative auto-condensation of the starting material. Herein, the scope and limitations of this transformation are reported. Graphical abstract

  摘要该手稿描述了由β-酮酸聚合合成芳基和烷基二取代的γ-吡喃酮。反应在三氟甲磺酸酐的存在下通过原料的空前的脱羧自动缩合而进行。在此，报道了这种转变的范围和局限性。 图形概要
• Redesign of a Pyrylium Photoredox Catalyst and Its Application to the Generation of Carbonyl Ylides
  作者：Edwin Alfonzo、Felix Steven Alfonso、Aaron B. Beeler

  DOI：10.1021/acs.orglett.7b01222

  日期：2017.6.2

  We report the exploration into photoredox generation of carbonyl ylides from benzylic epoxides using newly designed 4-mesityl-2,6-diphenylpyrylium tetrafluoroborate (MDPT) and 4-mesityl-2,6-di-p-tolylpyrylium tetrafluoroborate (MD(p-tolyl)PT) catalysts. These catalysts are excited at visible wavelengths, are highly robust, and exhibit some of the highest oxidation potentials reported. Their utility

  我们报告探索photoredox代从苄环氧化物羰基叶立德采用全新设计的4-三甲-2,6- diphenylpyrylium四氟硼酸盐（MDPT）和4-三甲-2,6-二p -tolylpyrylium四氟硼酸盐（MD（p甲苯基）PT）催化剂。这些催化剂在可见光波长下被激发，具有很高的鲁棒性，并且表现出某些报道的最高氧化电位。在从苄基环氧化物温和而有效地生成羰基化物中证明了它们的效用，否则当前的普通光氧化还原催化剂无法实现。
• Synthesis of pyrone carbaldehydes, pyrone sulfonium ylides and related epoxides
  作者：Aziz Shahrisa、Mahnaz Saraei

  DOI：10.1002/jhet.79

  日期：2009.3

  Hexaminium salts of 4-pyrones were synthesized by treatment of 2-(4-bromomethylphenyl)-6-methyl-4H-pyran-4-one and 2-(4-bromomethylphenyl)-6-phenyl-4H-pyran-4-one with hexamethyl-enetetramine in chloroform in 71 and 84% yields respectively. Hydrolysis of and in EtOH:H2O produced the corresponding aldehydes and in 43 and 58% yields respectively. The reaction of bromopyrones and with dimethylsulfide

  4-吡喃六甲铵盐 通过处理合成 2-（4-溴甲基苯基）-6-甲基-4 H-吡喃-4-酮 和 2-（4-溴甲基苯基）-6-苯基-4 H-吡喃-4-酮 和 六甲基-亚乙基四胺在氯仿中的产率分别为71％和84％。水解的 和 在EtOH：H 2 O中产生相应的醛 和 分别有43％和58％的产量。溴吡喃酮的反应 和 和 甲醇中的二甲基硫醚：CH 2 Cl 2提供相应的sulf盐 和 分别有66％和65％的产量。治疗 和 与芳烃carbaldehydes如（AR = p -ClC 6 ħ 4，ö -ClC 6 ħ 4，p -NO 2 ç 6 ħ 4，ö -NO 2 ç 6 ħ 4，p -FC 6 ħ 4，2-萘基，p -MeOC 6 H 4，C 6 H 5 CH CH，p -MeC 6 H 4，C 6 H 5和4-（4-氧代-6-苯基-4 H-吡喃-2-基）苯甲醛 ）在CH 3 CN：H 2 O中存在