tert-butyl 5-phenylthiazole-4-carboxylate

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑类
• 英文名称: tert-butyl 5-phenylthiazole-4-carboxylate
• 英文别名: Tert-butyl 5-phenyl-1,3-thiazole-4-carboxylate；tert-butyl 5-phenyl-1,3-thiazole-4-carboxylate
• 化学式: C₁₄H₁₅NO₂S
• 分子量: 261.345
• InChiKey: CGBOTXGHKCUUKN-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.8
• 重原子数：
  18
• 可旋转键数：
  4
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.29
• 拓扑面积：
  67.4
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为产物：
  描述：

  溴苯 、 tert-butyl thiazole-4-carboxylate 在 palladium diacetate 、 potassium carbonate 、 tricyclohexylphosphine tetrafluoroborate 、 三甲基乙酸 作用下， 以 1,4-二氧六环 为溶剂， 反应 18.0h， 以61%的产率得到tert-butyl 5-phenylthiazole-4-carboxylate
  参考文献：
  名称：

  机构选型区域控制在基本辅助，钯催化直接Ç ？H与卤化物的偶联：恶唑和噻唑-4-羧酸盐的第一种方法

  摘要：

  两个基地辅助非一致金属化-去质子化（NCMD）和协同金属化-去质子化（CMD）已被确定为在钯催化的直接C上两个有效的操作机构通过与卤化物恶唑的耦合和噻唑-4-羧酸酯ħ碱和溶剂效应实验。然后通过控制电子和空间因素之间的平衡，设计了恶唑和噻唑-4-羧酸酯系列中新颖的C2和C5选择性CMD直接芳基化方法。值得注意的是，钯催化剂和底物之间的电荷相互作用被确定为控制选择性和减少CMD反应中空间因素的影响的参数。

  DOI：

  10.1002/chem.201101615

文献信息

• Carbonates: eco-friendly solvents for palladium-catalysed direct arylation of heteroaromatics
  作者：Jia Jia Dong、Julien Roger、Cécile Verrier、Thibaut Martin、Ronan Le Goff、Christophe Hoarau、Henri Doucet

  DOI：10.1039/c0gc00229a

  日期：——

  The palladium-catalysed direct 2-, 4- or 5-arylation of a wide range of heteroaromatics with aryl halides proceed in moderate to good yields using the eco-friendly solvents carbonates. The best yields were obtained using benzoxazole or thiazole derivatives. The arylation of furan, thiophene, pyrrole, imidazole or isoxazole derivatives was found to require a more elevated reaction temperature.

  这 钯环保型芳烃卤化物催化的各种杂芳族化合物与芳基卤化物的直接2-，4-或5-芳基化反应均能以中等至良好的收率进行 溶剂碳酸盐。使用以下方法可获得最佳产量苯并恶唑 或者 噻唑衍生品。这芳基化 的 呋喃， 噻吩， 吡咯， 咪唑 或者 异恶唑 发现衍生物需要更高的反应温度。
• Direct C-2 Arylation of Alkyl 4-Thiazolecarboxylates: New Insights in Synthesis of Heterocyclic Core of Thiopeptide Antibiotics
  作者：Thibaut Martin、Cécile Verrier、Christophe Hoarau、Francis Marsais

  DOI：10.1021/ol801035c

  日期：2008.7.3

  The Pd(0)-catalyzed regioselective C-2 (hetero)arylation of tert-butyl 4-thiazolecarboxylate with a broad (hetero)aryl halide is reported, including the direct coupling of pyridinyl halides. The process has allowed the preparation of valuable 2-pyridynyl-4-thiazolecarboxylates which are components of the complex heterocyclic core of thiopeptides antibiotics. As a first application, a synthesis of a tert-butyl sulfomycinamate thio-analogue from tert-butyl 4-thiazolecarboxylate is here described through a three-step direct pyridinylation, halogenation, and Stille cross-coupling sequence.
• Ligand controlled orthogonal base-assisted direct C–H bond arylation in oxa(thia)zole-4-carboxylate series. New insights in nCMD mechanism
  作者：Laure Théveau、Olivier Querolle、Georges Dupas、Christophe Hoarau

  DOI：10.1016/j.tet.2013.01.073

  日期：2013.6

  Alkyl- and arylphosphines have been screened in competitive C2-H/C5-H direct phenylation of oxa(thia)zole-4-carboxylates using Cs2CO3 and Rb2CO3 carbonate bases. nCMD-based C2-H selective direct phenylation was highly kinetically reduced (or enhanced) in favor (or to the detriment) of CMD-based direct C5-H phenylation with bromo- and chlorobenzene, respectively, using highly electron-rich ligands. These results gave novel experimental proof in favor of the electrophilic substitution-type mechanism for nCMD process based upon a prior nitrogen-arylpalladium complex interaction that preludes the deprotonation step. (C) 2013 Elsevier Ltd. All rights reserved.