ethyl 5-(2-hydroxyethyl)-4,5-dihydro-3-isoxazolecarboxylate | 258844-47-2

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑啉类
• 英文名称: ethyl 5-(2-hydroxyethyl)-4,5-dihydro-3-isoxazolecarboxylate
• 英文别名: ethyl 5-(2-hydroxyethyl)-4,5-dihydroisoxazole-3-carboxylate；ethyl 5-(hydroxyethyl)-4,5-dihydro-3-isoazolecarboxylate；3-ethoxycarbonyl-5-(2-hydroxyethyl)isoxazoline；Ethyl 5-(2-hydroxyethyl)-4,5-dihydro-1,2-oxazole-3-carboxylate
• CAS: 258844-47-2
• 化学式: C₈H₁₃NO₄
• 分子量: 187.196
• InChiKey: YZLNGBSYNFLNEL-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  0.2
• 重原子数：
  13
• 可旋转键数：
  5
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.75
• 拓扑面积：
  68.1
• 氢给体数：
  1
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  ethyl 5-(2-hydroxyethyl)-4,5-dihydro-3-isoxazolecarboxylate 在 N-甲基吗啉 、 吡啶 、 ammonium hydroxide 、 sodium hydroxide 、 sodium azide 、 (benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate 、 三苯基膦 作用下， 以 1,4-二氧六环 、 乙醇 、 二氯甲烷 、 N,N-二甲基甲酰胺 为溶剂， 反应 38.0h， 生成 2-[(S)-2,4,6-trimethylphenylsulfonylamino]-3-[5-(2-aminoethyl)isoxazolin-3-ylcarbonyl]aminopropionic acid tert-butyl ester
  参考文献：
  名称：

  Isoxazolines as Potent Antagonists of the Integrin α_vβ₃

  摘要：

  Starting with lead compound 2, we sought to increase the selectivity for alpha(v)beta(3)-mediated cell adhesion by examining the effects of structural changes in both the guanidine mimetic and the substituent alpha to the carboxylate. To prepare some of the desired aminoimidazoles, a novel reductive amination utilizing a trityl-protected aminoimidazole was developed. It was found that guanidine mimetics with a wide range of pK(a)'s were potent antagonists of alpha(v)beta(3). In general, it appeared that an acylated 2-aminoimidazole guanidine mimetic imparted excellent selectivity for alpha(v)beta(3)-mediated adhesion versus alpha(IIb)beta(3)-mediated platelet aggregation, with selectivity of approximately 3 orders of magnitude observed for compounds 3g and 3h. It was also found in this series that the alpha-substituent was required for potent activity and that 2,6-disubstituted arylsulfonamides were optimal. In addition, the selective alpha(v)beta(3) antagonist 3h was found to be a potent inhibitor of alpha(v)beta(3)-mediated cell migration.

  DOI：

  10.1021/jm9900321
• 作为产物：
  描述：

  重氮乙酸乙酯 、 3-丁烯-1-醇 在 三乙烯二胺 、 亚硝酸特丁酯 、 copper(II) acetate monohydrate 作用下， 以 甲苯 为溶剂， 反应 12.0h， 以50%的产率得到ethyl 5-(2-hydroxyethyl)-4,5-dihydro-3-isoxazolecarboxylate
  参考文献：
  名称：

  铜基碳氢化合物与亚硝基自由基的偶联反应：串联反应构建异恶唑啉

  摘要：

  在这封信中，已经开发出卡宾铜与亚硝基自由基之间空前的交叉偶联反应。这种自由基-卡宾偶联反应（RCC反应）为制备各种异恶唑啉提供了一种新颖的方法，其特征是通过一锅法构建C–C，C–O和C═N键。温和的反应条件，广泛的底物范围和简单的操作方法进一步提高了我们方法的合成效用。

  DOI：

  10.1021/acs.orglett.7b02885

文献信息

• Acid-Base-Catalysed Condensation Reaction in Water: Isoxazolines and Isoxazoles from Nitroacetates and Dipolarophiles
  作者：Elena Trogu、Claudia Vinattieri、Francesco De Sarlo、Fabrizio Machetti

  DOI：10.1002/chem.201102264

  日期：2012.2.13

  Base‐catalysed condensation reactions of nitroacetic esters with dipolarophiles to give isoxazole derivatives proceed faster, and often with higher yields, in the presence of water than in organic solvents such as chloroform. Kinetic profiles show that induction times are greatly reduced when the reaction is performed “in water” or “on water”. Any specificity of the base related to H‐bonding ability

  与有机溶剂（如氯仿）相比，在水存在下，硝基乙酸酯与双极性亲和剂的碱催化缩合反应进行得更快，通常收率更高。动力学曲线表明，当反应在“水中”或“在水中”进行时，诱导时间大大减少。水中失去了与在氯仿中观察到的与H键结合能力有关的碱基的任何特异性：有机或无机碱基均给出相同的结果，而这仅取决于浓度。碱与亲核试剂的摩尔比为0.1可获得最佳转化，而加入一当量的碱或强酸则可防止反应发生。这些结果符合反应顺序，在该顺序中，可逆性添加到双极性亲和剂中，然后是酸催化的环加合物的不可逆脱水。由于不可逆的酸催化除水作用，这是水中发生缩合反应的一个显着例子。该反应已在温和条件下成功应用于含有多种官能团（包括羧酸和铵盐）的双极性亲和剂。这种新的点击式反应有望与生物环境兼容。在温和的条件下包括羧酸和铵盐。这种新的点击式反应有望与生物环境兼容。在温和的条件下包括羧酸和铵盐。这种新的点击式反应有望与生物环境兼容。
• 一种异噁唑啉衍生物的制备方法
  申请人：苏州大学

  公开号：CN107118171B

  公开（公告）日：2019-05-17

  本发明公开了一种异噁唑啉衍生物的制备方法，以烯烃衍生物、重氮衍生物以及亚硝酸叔丁酯为反应底物，以铜化物为催化剂，在碱的条件下，通过金属卡宾与自由基偶联，进一步串联环化反应制备得到异噁唑啉衍生物；本发明设计了一种温和的反应条件，选用原料廉价易得，选用便宜的金属铜化合物为催化剂，直接在封管体系中就可以很方便的合成异噁唑啉衍生物衍生物。避免了传统合成方法使用大量氧化剂，贵金属作为催化剂，无水无氧等苛刻的实验条件，使得反应简单易行，后处理简单，具有潜在的工业应用价值。
• Isoxazoles and Isoxazolines by 1,3-Dipolar Cycloaddition: Base-Catalysed Condensation of Primary Nitro Compounds with Dipolarophiles
  作者：Fabrizio Machetti、Luca Cecchi、Elena Trogu、Francesco De Sarlo

  DOI：10.1002/ejoc.200700276

  日期：2007.9

  1,4-Diazabicyclo[2.2.2]octane (DABCO) or other suitable N-bases cause primary activated nitro compounds to condense with alkenes to yield isoxazolines or with alkynes to give isoxazoles. As the molar ratio of the base with respect to the dipolarophile decreased, the reaction became slower, but the nitro compound became more resistant to hydrolytic cleavage. The best results were achieved with a molar

  1,4-二氮杂双环 [2.2.2] 辛烷 (DABCO) 或其他合适的 N-碱导致初级活化硝基化合物与烯烃缩合生成异恶唑啉或与炔烃缩合生成异恶唑。随着碱与偶极体的摩尔比降低，反应变慢，但硝基化合物对水解裂解的抵抗力更强。碱的摩尔比在 0.05-0.1 范围内时获得最佳结果。反应在氯仿中于 60 °C 下进行；对于硝基乙酸乙酯和苯基硝基甲烷，可以使用 80 °C 的乙醇获得更好的结果和更短的反应时间。建议采用催化循环：
• Coupling Reaction of Cu-Based Carbene and Nitroso Radical: A Tandem Reaction To Construct Isoxazolines
  作者：Rongxiang Chen、Yanwei Zhao、Shangwen Fang、Wenhao Long、Hongmei Sun、Xiaobing Wan

  DOI：10.1021/acs.orglett.7b02885

  日期：2017.11.3

  unprecedented cross-coupling reaction between copper carbene and nitroso radical has been developed. This radical-carbene coupling reaction (RCC reaction) offers a novel approach for the preparation of various isoxazolines, which features the construction of C–C, C–O, and C═N bonds in a one-pot process. The synthetic utility of our method is further enhanced by its mild reaction conditions, wide substrate

  在这封信中，已经开发出卡宾铜与亚硝基自由基之间空前的交叉偶联反应。这种自由基-卡宾偶联反应（RCC反应）为制备各种异恶唑啉提供了一种新颖的方法，其特征是通过一锅法构建C–C，C–O和C═N键。温和的反应条件，广泛的底物范围和简单的操作方法进一步提高了我们方法的合成效用。
• Isoxazolines as Potent Antagonists of the Integrin α_vβ₃
  作者：William J. Pitts、John Wityak、Joanne M. Smallheer、A. Ewa Tobin、James W. Jetter、Jennifer S. Buynitsky、Patricia P. Harlow、Kimberly A. Solomon、Martha H. Corjay、Shaker A. Mousa、Ruth R. Wexler、Prabhakar K. Jadhav

  DOI：10.1021/jm9900321

  日期：2000.1.1

  Starting with lead compound 2, we sought to increase the selectivity for alpha(v)beta(3)-mediated cell adhesion by examining the effects of structural changes in both the guanidine mimetic and the substituent alpha to the carboxylate. To prepare some of the desired aminoimidazoles, a novel reductive amination utilizing a trityl-protected aminoimidazole was developed. It was found that guanidine mimetics with a wide range of pK(a)'s were potent antagonists of alpha(v)beta(3). In general, it appeared that an acylated 2-aminoimidazole guanidine mimetic imparted excellent selectivity for alpha(v)beta(3)-mediated adhesion versus alpha(IIb)beta(3)-mediated platelet aggregation, with selectivity of approximately 3 orders of magnitude observed for compounds 3g and 3h. It was also found in this series that the alpha-substituent was required for potent activity and that 2,6-disubstituted arylsulfonamides were optimal. In addition, the selective alpha(v)beta(3) antagonist 3h was found to be a potent inhibitor of alpha(v)beta(3)-mediated cell migration.