4-isopropyl-2-(4-methoxyphenyl)oxazol-5(4H)-one | 79137-48-7

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: 4-isopropyl-2-(4-methoxyphenyl)oxazol-5(4H)-one
• 英文别名: 5(4H)-Oxazolone, 2-(4-methoxyphenyl)-4-(1-methylethyl)-；2-(4-methoxyphenyl)-4-propan-2-yl-4H-1,3-oxazol-5-one
• CAS: 79137-48-7
• 化学式: C₁₃H₁₅NO₃
• 分子量: 233.267
• InChiKey: WMYZVOSJJQUTOD-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.8
• 重原子数：
  17
• 可旋转键数：
  3
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.38
• 拓扑面积：
  47.9
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  4-isopropyl-2-(4-methoxyphenyl)oxazol-5(4H)-one 在 2-phenyl-6,7-dihydro-5H-pyrrolo[2,1-c][1,2,4]triazol-2-ium tetrafluoroborate 、 双(三甲基硅烷基)氨基钾 、 三乙胺 作用下， 以 四氢呋喃 为溶剂， 反应 0.08h， 生成 4-isopropyl-5-oxo-2-(4-methoxyphenyl)-4,5-dihydrooxazole-4-carboxylic acid methyl ester
  参考文献：
  名称：

  Efficient N-Heterocyclic Carbene-Catalyzed O- to C-Acyl Transfer

  摘要：

  An N-heterocyclic carbene promotes the rearrangement of alpha-amino acid derived O-acyl carbonates to their corresponding C-acylated isomers, generating a C-C bond and a quaternary stereocenter with high efficiency, under mild reaction conditions and with low catalyst loadings.

  DOI：

  10.1021/ol061380h
• 作为产物：
  描述：

  l-Valine, N-(p-anisoyl)-, methyl ester 在 N,N'-二环己基碳二亚胺 、 sodium hydroxide 作用下， 以 甲醇 、 二氯甲烷 为溶剂， 生成 4-isopropyl-2-(4-methoxyphenyl)oxazol-5(4H)-one
  参考文献：
  名称：

  Regiodivergent Enantioselective γ-Additions of Oxazolones to 2,3-Butadienoates Catalyzed by Phosphines: Synthesis of α,α-Disubstituted α-Amino Acids and N,O-Acetal Derivatives

  摘要：

  Phosphine-catalyzed regiodivergent enantioselective C-2- and C-4-selective gamma-additions of oxazolones to 2,3-butadienoates have been developed. The C-4-selective gamma-addition of oxazolones occurred in a highly enantioselective manner when 2-aryl-4-alkyloxazol-5-(4H)-ones were employed as pronudeophiles. With the employment of 2-alkyl-4-aryloxazol-5-(4H)-ones as the donor, C-2-selective gamma-addition of oxazolones took place in a highly enantioselective manner. The C-4-selective adducts provided rapid access to optically enriched alpha,alpha-disubstituted alpha-amino acid derivatives, and the C-2-selective products led to facile synthesis of chiral N,O-acetals and gamma-lactols. Theoretical studies via DFT calculations suggested that the origin of the observed regioselectivity was due to the distortion energy that resulted from the interaction between the nudeophilic oxazolide and the electrophilic phosphonium intermediate.

  DOI：

  10.1021/jacs.5b10524

文献信息

• Strategy for Catalytic Chemoselective Cross-Enolate Coupling Reaction via a Transient Homocoupling Dimer
  作者：Takafumi Tanaka、Tsukushi Tanaka、Taro Tsuji、Ryo Yazaki、Takashi Ohshima

  DOI：10.1021/acs.orglett.8b01313

  日期：2018.6.15

  A new strategy, a transient homocoupling dimer strategy, for direct catalytic oxidative cross-enolate coupling reactions is developed. Cross-enolate coupling products bearing a (contiguous) tetrasubstituted carbon center were obtained chemoselectively without the need for stoichiometric amounts of strong bases/metal oxidants, and thus, the present catalysis provides a general method for the synthesis

  提出了一种新的策略，即瞬时均相偶合二聚体策略，用于直接催化氧化交叉烯醇盐偶联反应。不需要化学计量的强碱/金属氧化剂，就可以化学选择性地获得带有（连续）四取代碳中心的烯醇式偶联产物，因此，本发明的催化剂提供了一种合成非天然α，α-二取代氨基的一般方法酸性图案。a内酯和2-酰基咪唑单元的独特转化突出了本催化的合成效用。
• Highly tunable arylated cinchona alkaloids as bifunctional catalysts
  作者：Cormac Quigley、Zaida Rodríguez-Docampo、Stephen J. Connon

  DOI：10.1039/c1cc14684j

  日期：——

  We report the design and evaluation of a library of chiral bifunctional organocatalysts in which the distance between the catalytically active units can be systematically varied.

  我们报道了一种手性双功能有机催化剂库的设计与评估，其中催化活性单元之间的距离可以系统地变化。
• Potassium Acetate-Catalyzed Double Decarboxylative Transannulation To Access Highly Functionalized Pyrroles
  作者：Jun-Kuan Li、Biying Zhou、Yu-Chen Tian、Chunman Jia、Xiao-Song Xue、Fa-Guang Zhang、Jun-An Ma

  DOI：10.1021/acs.orglett.0c03621

  日期：2020.12.18

  remodeling by utilizing CO2 moiety as traceless activating and directing groups in both reaction partners. The synthetic value is evidenced by the rapid preparation of a broad spectrum of highly functionalized 3-carbamoyl-4-aryl pyrroles in good to excellent yields with exclusive regio-control, including the important Atorvastatin core.

  有效构建通用吡咯药物核心的新合成策略的开发，尤其是在操作上简单且对环境无害的方式，仍然是一个艰巨而具有挑战性的目标。在这里，我们报告了易于获得的恶唑酮和异恶唑烷二酮之间的KOAc催化的双脱羧环过氧化物。这种转化代表了利用CO 2部分作为两个反应伙伴中无痕的活化和引导基团进行骨骼重塑的新方法。合成的价值可通过快速制备各种高官能度的3-氨基甲酰基-4-芳基吡咯，以良好的收率，并通过独家区域控制（包括重要的阿托伐他汀核心）来获得。
• Enantioselective Organocatalytic 1,6-Addition of Azlactones to <i>para</i>-Quinone Methides: An Access to α,α-Disubstituted and β,β-Diaryl-α-amino acid Esters
  作者：Wenjun Li、Xianhong Xu、Yang Liu、Hua Gao、Yuyu Cheng、Pengfei Li

  DOI：10.1021/acs.orglett.8b00072

  日期：2018.2.16

  This work describes the first enantioselective 1,6-additions of azlactones to para-quinone methides. In the presence of a chiral phosphoric acid, 1,6-adducts were obtained in high yields (up to 96%) with excellent diastereoselectivities and enantioselectivities (all >20:1 diastereoselectivity ratio (dr), up to 99% enantiomeric excess (ee)). Importantly, the method offers a facile synthetic approach

  这项工作描述了对内苯醌甲基化物中a内酯的第一个对映选择性的1,6-加成反应。在手性磷酸的存在下，可以高收率（高达96％）获得1,6-加合物，具有出色的非对映选择性和对映选择性（所有> 20：1非对映选择性比率（dr），对映体过量高达99％（ee ））。重要的是，该方法不仅提供对映体纯的α，α-二取代的α-氨基酸酯，而且提供了具有相邻的叔和季生立体中心的非天然对映体富集的β，β-二芳基-α-氨基酸酯的简便合成方法。
• Asymmetric trifluoromethylthiolation of azlactones under chiral phase transfer catalysis
  作者：Marina Sicignano、Ricardo I. Rodríguez、Vito Capaccio、Fabio Borello、Rafael Cano、Francesco De Riccardis、Luca Bernardi、Sergio Díaz-Tendero、Giorgio Della Sala、José Alemán

  DOI：10.1039/d0ob00476f

  日期：——

  The first enantioselective method for the installation of the SCF3 group at the C-4 position of azlactones is described in the present communication under quinidinium phase transfer catalysis. The higher performance of substrates containing electron-rich 2-aryl groups at the azlactone was rationalized using DFT calculations.

  在喹啉鎓相转移催化下的本说明书中描述了将SCF3基团安装在a内酯的C-4位的第一种对映选择性方法。使用DFT计算合理化了含氮杂内酯中富含电子的2-芳基的底物的较高性能。