5-methoxycarbonyloxy-4-benzyl-2-(4-methoxyphenyl)oxazole

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑类
• 英文名称: 5-methoxycarbonyloxy-4-benzyl-2-(4-methoxyphenyl)oxazole
• 英文别名: 4-benzyl-2-(4-methoxyphenyl)oxazol-5-yl methyl carbonate；[4-Benzyl-2-(4-methoxyphenyl)-1,3-oxazol-5-yl] methyl carbonate；[4-benzyl-2-(4-methoxyphenyl)-1,3-oxazol-5-yl] methyl carbonate
• 化学式: C₁₉H₁₇NO₅
• 分子量: 339.348
• InChiKey: WCNMKBCKWVFBLS-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.4
• 重原子数：
  25
• 可旋转键数：
  7
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.16
• 拓扑面积：
  70.8
• 氢给体数：
  0
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  5-methoxycarbonyloxy-4-benzyl-2-(4-methoxyphenyl)oxazole 在 3,4-dihydro-2H-benzo[4,5]thiazolo[3,2-a]pyrimidine 作用下， 以 二氯甲烷 为溶剂， 反应 0.25h， 以87%的产率得到4-benzyl-5-oxo-2-(4-methoxyphenyl)-4,5-dihydrooxazole-4-carboxylic acid methyl ester
  参考文献：
  名称：

  Amidine catalysed O- to C-carboxyl transfer of heterocyclic carbonate derivatives

  摘要：

  为了成为有效的O向C羧基转移剂，胍基的结构要求被阐明，并通过应用于一系列噁唑基、苯并呋喃基和吲哚基碳酸酯来概述该过程的范围。

  DOI：

  10.1039/b805850d
• 作为产物：
  描述：

  4-benzyl-2-(4-methoxyphenyl)oxazol-5(4H)-one 、 氯甲酸甲酯 在 三乙胺 作用下， 以 四氢呋喃 为溶剂， 以90%的产率得到5-methoxycarbonyloxy-4-benzyl-2-(4-methoxyphenyl)oxazole
  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

文献信息

• Isothiourea-Catalyzed Enantioselective Carboxy Group Transfer
  作者：Caroline Joannesse、Craig P. Johnston、Carmen Concellón、Carmen Simal、Douglas Philp、Andrew D. Smith

  DOI：10.1002/anie.200904333

  日期：2009.11.9

  Transferable skills: Enantiomerically pure isothioureas promote the O‐ to C‐carboxyl group transfer of oxazolyl carbonates with excellent levels of enantiocontrol (see scheme). The origin of the enantioselectivity of this process was probed mechanistically and rationalized computationally.

  可转移的技能：对映体纯净的异硫脲可促进对苯二甲酰碳酸酯的O-到C-羧基的转移，并具有出色的对映控制水平（参见方案）。机械地探查了该过程的对映选择性的起源，并在计算上进行了合理化。
• Isothiourea-Mediated Asymmetric O- to C-Carboxyl Transfer of Oxazolyl Carbonates: Structure-Selectivity Profiles and Mechanistic Studies
  作者：Caroline Joannesse、Craig P. Johnston、Louis C. Morrill、Philip A. Woods、Madeleine Kieffer、Tobias A. Nigst、Herbert Mayr、Tomas Lebl、Douglas Philp、Ryan A. Bragg、Andrew D. Smith

  DOI：10.1002/chem.201102847

  日期：2012.2.20

  The structural motif within a series of tetrahydropyrimidine‐based isothioureas necessary for generating high asymmetric induction in the asymmetric Steglich rearrangement of oxazolyl carbonates is fully explored, with crossover and dynamic 19F NMR experiments used to develop a mechanistic understanding of this transformation.

  充分探索了一系列四氢嘧啶基异硫脲中的结构基序，这些结构对于恶唑碳酸酯的不对称Steglich重排产生高不对称诱导是必要的，并使用交叉和动态19 F NMR实验来发展对该转变的机理理解。
• Asymmetric Nucleophilic Catalysis with an Octahedral Chiral-at-Metal Iridium(III) Complex
  作者：Thomas Cruchter、Michael G. Medvedev、Xiaodong Shen、Thomas Mietke、Klaus Harms、Michael Marsch、Eric Meggers

  DOI：10.1021/acscatal.7b01296

  日期：2017.8.4

  Herein, we report about the design, synthesis, and application of a nucleophilic octahedral chiral-only-at-metal iridium(III) complex. We demonstrate that the enantiopure form of this complex serves as an efficient catalyst for the asymmetric Steglich rearrangement of O-acylated azlactones (up to 96% ee and 99% yield) and the related asymmetric Black rearrangement of O-acylated benzofuranones (up to

  在此，我们报道了亲核八面体仅手性金属铱（III）配合物的设计，合成和应用。我们证明了该复合物的对映体纯形式可作为O-酰化氮杂内酯的不对称Steglich重排（ee高达96％和99％产率）和O的相关不对称Black重排的有效催化剂-酰化的苯并呋喃酮（ee最高可达94％，产率高达99％）。我们提供了这两个酰基迁移反应的机理以及活性催化剂的晶体结构和催化中间体类似物以及基于它们的量子化学计算方法的手性识别方式的见解。此外，我们证明了所提出的催化剂还有效地催化了芳基烷基烯酮和2-氰基吡咯之间的不对称反应，从而给出了相应的α-手性N-酰基吡咯（高达95％ee和99％产率）。
• Catalytic enantioselective Steglich rearrangements using chiral N-heterocyclic carbenes
  作者：Craig D. Campbell、Carmen Concellón、Andrew D. Smith

  DOI：10.1016/j.tetasy.2011.04.001

  日期：2011.4

  The evaluation of a range of enantiomerically pure NHCs, prepared in situ from imidazolinium or triazolium salt precatalysts, to promote the catalytic enantioselective Steglich rearrangement of oxazolyl carbonates to their C-carboxyazlactones, is reported. Modest levels of enantioselectivity (up to 66% ee) are observed using oxazolidinone derived NHCs. (C) 2011 Elsevier Ltd. All rights reserved.
• Probing the Efficiency of N-Heterocyclic Carbene Promoted <i>O</i>- to C-Carboxyl Transfer of Oxazolyl Carbonates
  作者：Jennifer E. Thomson、Craig D. Campbell、Carmen Concellón、Nicolas Duguet、Kathryn Rix、Alexandra M. Z. Slawin、Andrew D. Smith

  DOI：10.1021/jo702720a

  日期：2008.4.1

  Screening of a range of azolium salts, bases and solvents for reactivity indicates that triazolinylidenes, generated in situ with KHMDS in THF, promote the Steglich rearrangement of oxazolyl carbonates with high catalytic efficiency (typical reaction time 5 min at < 1.5 mol % NHC). This protocol shows wide substrate applicability, even allowing the efficient generation of vicinal quaternary centers. An improved experimental procedure is also described that allows a simplified one-pot reaction protocol to be employed with similarly high catalytic efficiency.