methyl N-benzylcarbamate | 1208328-88-4

• 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: methyl N-benzylcarbamate
• CAS: 1208328-88-4
• 化学式: C₉H₁₁NO₂
• 分子量: 164.181
• InChiKey: ZWZIHLRSOOMEKT-RVRFMXCPSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.4
• 重原子数：
  12
• 可旋转键数：
  3
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.22
• 拓扑面积：
  38.3
• 氢给体数：
  1
• 氢受体数：
  2

反应信息

• 作为产物：
  描述：

  甲醇 、 (oxo(111C)methylideneamino)methylbenzene 以 N,N-二甲基甲酰胺 、 乙腈 为溶剂， 生成 methyl N-benzylcarbamate
  参考文献：
  名称：

  “环内”[11 C]CO2 固定：原型和概念验证

  摘要：

  碳11标记的二氧化碳是合成正电子发射断层扫描放射性示踪剂的最常见原料，可直接用于11 C-羰基化。在此，我们报告了一种设备的开发，该设备利用“环内”技术通过[11C]CO2固定来促进11C-羰基放射性示踪剂的稳健且可重复的合成。我们的“环内”[11 C]CO2 固定方法简单、高效，并且在环境压力和温度下顺利进行。我们选择了模型 11 C-羰基标记的氨基甲酸酯以及对称和不对称的脲，基于它们在放射性示踪剂设计中的广泛用途以及我们用于概念验证的临床研究兴趣。该方法的实用性通过单胺氧化酶 B、[11 C]SL25.1188 和 2 种新型脂肪酸酰胺水解酶抑制剂的可逆放射性药物的合成得到证明。这些放射性示踪剂经过分离和配制（>3.5 GBq；100 mCi），具有放射化学纯度（>99%）和摩尔放射性（≥80 GBq/μmol；≥2162 mCi/μmol）。

  DOI：

  10.1002/jlcr.3528

文献信息

• Direct fixation of [¹¹C]-CO₂by amines: formation of [¹¹C-carbonyl]-methylcarbamates
  作者：Alan A. Wilson、Armando Garcia、Sylvain Houle、Neil Vasdev

  DOI：10.1039/b916419g

  日期：——

  [11C-Carbonyl]-methylcarbamates can be synthesised directly from [11C]-CO2 and primary or secondary amines in a one-pot, two-step reaction. The use of either diazabicyclo[5.4.0]undec-7-ene (DBU) or 2-tert-butylimino-2-diethylamino-1,3-dimethyl-perhydro-1,3,2-diazaphosphorine (BEMP) enables efficient trapping of [11C]-CO2 in small volumes of DMF as [11C]-carbamate salts. Subsequent reaction with a variety of methylating agents rapidly generates the desired [11C-carbonyl]-methylcarbamates in high radiochemical yields. The usefulness of the method is illustrated by the efficient radiosynthesis of a kappa opioid receptor imaging radiotracer, useful in positron emission tomography (PET).

  [11C-羰基]-甲基氨基甲酸酯可以通过[11C]-CO2和一级或二级胺在一个反应锅中进行直接合成，反应分为两个步骤。使用二氮杂双环[5.4.0]十一烯（DBU）或2-tert-丁基亚氨基-2-二乙氨基-1,3-二甲基-全氢-1,3,2-二氮基磷烷（BEMP）能够有效地在小体积DMF中捕获[11C]-CO2，形成[11C]-氨基甲酸盐。随后与多种甲基化试剂反应，迅速生成所需的[11C-羰基]-甲基氨基甲酸酯，且放射化学产率较高。该方法的实用性通过有效的放射合成kappa阿片受体成像放射性示踪剂得以体现，后者在正电子发射断层扫描（PET）中具有重要应用。
• Synthesis and Application of Isocyanates Radiolabeled with Carbon-11
  作者：Alan A. Wilson、Armando Garcia、Sylvain Houle、Oleg Sadovski、Neil Vasdev

  DOI：10.1002/chem.201002345

  日期：2011.1.3

  efficiently prepared by dehydration of [11C]carbamate salts, which in turn are easily formed from cyclotron‐produced [11C]CO2 and amines in the presence of a CO2 fixation agent. The [11C]isocyanates are useful radiosynthons for the synthesis of a variety of [carbonyl‐11C]‐labeled asymmetrical ureas and carbamate esters. The method is well suited to incorporate any isotope of carbon, and is especially

  碳11标记的异氰酸酯可通过[ 11 C]氨基甲酸酯盐的脱水而有效地制备，而这些反过来又很容易由回旋加速器产生的[ 11 C] CO 2和胺在CO 2固定剂存在下形成。[ 11 C]异氰酸酯可用于合成各种[羰基11 C]标记的不对称脲和氨基甲酸酯的放射性合成子。该方法非常适合掺入碳的任何同位素，并且特别适用于体内成像的正电子发射断层扫描（PET）放射性示踪剂。通过使用该方法制备[羰基-11]可以证明这一点。C] -6-羟基-[1,1'-联苯] -3-基环己基氨基甲酸酯，这是一种用于脂肪酸酰胺水解酶PET显像的新型放射性示踪剂。
• Recent applications of a single quadrupole mass spectrometer in 11C, 18F and radiometal chemistry
  作者：Thomas L. Collier、Kenneth Dahl、Nickeisha A. Stephenson、Jason P. Holland、Adam Riley、Steven H. Liang、Neil Vasdev

  DOI：10.1016/j.jfluchem.2018.02.009

  日期：2018.6

  Mass spectrometry (MS) has longstanding applications in radiochemistry laboratories, stemming from carbon dating. However, research on the development of radiotracers for molecular imaging with either positron emission tomography (PET) or single photon emission computed tomography has yet to take full advantage of MS. This inertia has been attributed to the relatively low concentrations of radiopharmaceutical formulations and lack of access to the required MS equipment due to the high costs for purchase and maintenance of specialized MS systems. To date, single quadrupole (SQ)-MS coupled to liquid chromatography (LC) systems is the main form of MS that has been used in radiochemistry laboratories. These LC-MS systems are primarily used for assessing the chemical purity of radiolabeling precursor or standard molecules but also have applications in the determination of metabolites. Herein, we highlight personal experiences using a compact SQ-MS in our PET radiochemistry laboratories, to monitor the small amounts of carrier observed in most radiotracer preparations, even at high molar activities. The use of a SQ-MS in the observation of the low mass associated with nonradioactive species which are formed along with the radiotracer from the trace amounts of carrier found is demonstrated. Herein, we describe a pre-concentration system to detect dilute radiopharmaceutical formulations and metabolite analyses by SQ-MS. Selected examples where SQ-MS was critical for optimization of radiochemical reactions and for unequivocal characterization of radiotracers are showcased. We also illustrate examples where SQ-MS can be applied in identification of radiometal complexes and development of a new purification methodology for Pd-catalyzed radiofluorination reactions, shedding light on the identity of metal complexes present in the labelling solution.
• “In-loop” [¹¹ C]CO₂ fixation: Prototype and proof of concept
  作者：Kenneth Dahl、Thomas L. Collier、Ran Cheng、Xiaofei Zhang、Oleg Sadovski、Steven H. Liang、Neil Vasdev

  DOI：10.1002/jlcr.3528

  日期：2018.3

  model 11 C-carbonyl-labeled carbamates as well as symmetrical and unsymmetrical ureas based on their widespread use in radiotracer design and our clinical research interests for proof of concept. Utility of this method is demonstrated by the synthesis of a reversible radiopharmaceutical for monoamine oxidase B, [11 C]SL25.1188, and 2 novel fatty acid amide hydrolase inhibitors. These radiotracers were

  碳11标记的二氧化碳是合成正电子发射断层扫描放射性示踪剂的最常见原料，可直接用于11 C-羰基化。在此，我们报告了一种设备的开发，该设备利用“环内”技术通过[11C]CO2固定来促进11C-羰基放射性示踪剂的稳健且可重复的合成。我们的“环内”[11 C]CO2 固定方法简单、高效，并且在环境压力和温度下顺利进行。我们选择了模型 11 C-羰基标记的氨基甲酸酯以及对称和不对称的脲，基于它们在放射性示踪剂设计中的广泛用途以及我们用于概念验证的临床研究兴趣。该方法的实用性通过单胺氧化酶 B、[11 C]SL25.1188 和 2 种新型脂肪酸酰胺水解酶抑制剂的可逆放射性药物的合成得到证明。这些放射性示踪剂经过分离和配制（>3.5 GBq；100 mCi），具有放射化学纯度（>99%）和摩尔放射性（≥80 GBq/μmol；≥2162 mCi/μmol）。