1-(thiophen-2-yl)propan-2-one oxime | 85515-93-1

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 杂芳族化合物
• 英文名称: 1-(thiophen-2-yl)propan-2-one oxime
• 英文别名: Thienylacetoxime；N-(1-thiophen-2-ylpropan-2-ylidene)hydroxylamine
• CAS: 85515-93-1
• 化学式: C₇H₉NOS
• 分子量: 155.221
• InChiKey: QYNWTPJWJGFJBV-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.5
• 重原子数：
  10
• 可旋转键数：
  2
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.29
• 拓扑面积：
  60.8
• 氢给体数：
  1
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  1-(thiophen-2-yl)propan-2-one oxime 在 copper(II) choride dihydrate 作用下， 以 aq. phosphate buffer 、 乙腈 为溶剂， 反应 7.0h， 以12.4 mg的产率得到2-噻吩基丙酮
  参考文献：
  名称：

  通过可见光光催化-水解序列将硝基烷烃温和地一锅法转化为酮或醛

  摘要：

  使用具有家用装饰性蓝色 LED 和添加剂 Et 3 N 和 DIPEA 的可见光光氧化还原催化策略，以及随后的水解序列，将硝基烷烃直接转化为相应的酮和醛的温和一锅法，构成已经开发出类似Nef的反应。值得注意的是，通过在 i-PrOH 中使用合适的光催化剂（例如，[Ir(dtbbpy)(ppy) 2 ]PF 6）和额外的添加剂 Et 3 N 以及 DIPEA 和 Mg(ClO 4 ) 2的组合（代替 CH 3CN)，将硝基烷烃转化为相应的肟，而不是硝酮，可以明显更有效。然后可以通过在pH 7缓冲溶液中与CuCl 2 ·2H 2 O反应将肟水解成酮。该方法具有转化效率高、条件温和、产率高以及对具有广泛不稳定官能团的化合物的普遍适用性等优点。

  DOI：

  10.1039/d2ob00267a
• 作为产物：
  描述：

  2-噻吩基丙酮 在 盐酸羟胺 、 sodium acetate 作用下， 以 甲醇 为溶剂， 生成 1-(thiophen-2-yl)propan-2-one oxime
  参考文献：
  名称：

  Copper‐Catalyzed Aza‐Sonogashira Cross‐Coupling To Form Ynimines: Development and Application to the Synthesis of Heterocycles

  摘要：

  AbstractNitrogen‐substituted alkynes, such as ynamines and ynamides, are versatile synthetic building blocks. Ynimines bearing additional nucleophilic and electrophilic centers relative to ynamines and ynamides are expected to have high synthetic potential. However, their chemical reactivity remains unexplored owing mainly to the lack of synthetic accessibility. We report herein a versatile copper‐catalyzed synthesis of ynimines from readily available O‐acetyl ketoximes and terminal alkynes. A wide range of O‐acetyl ketoximes derived from diaryl ketones, aryl alkyl ketones and dialkyl ketones underwent cross‐coupling with a diverse set of terminal alkynes to afford the ynimines in good to excellent yields. An unprecedented [5+1] heteroannulation reaction exploiting the reactivity of the ynimine generated in situ was subsequently developed for the synthesis of medicinally important heterocycles, including isoquinolines, azaindoles, azabenzofurans, azabenzothiophenes and carbolines.

  DOI：

  10.1002/anie.202110901

文献信息

• Practical Syntheses of N-Acetyl (E)-β-Arylenamides
  作者：Wenjun Tang、Zhihua Cai、Guodu Liu、Guangjun Jiao、Chris Senanayake

  DOI：10.1055/s-0033-1339976

  日期：——

  facile and practical method for the preparation of (E)-β-arylenamides [(E)-N-(1-arylprop-1-en-2-yl]acetamides] has been developed by reductive acetylation of the corresponding oximes with iron(II) acetate as the reducing reagent. Employment of hexamethylphosphoramide as the solvent was found to be critical for the high E/Z selectivity. The methodology has been applied in efficient syntheses of a key

  摘要 通过用铁还原相应的肟，开发了一种简便实用的制备（E）-β-芳基酰胺[（E）-N-（1-芳基丙-1-烯-2-基]乙酰胺]的方法（II）乙酸盐作为还原剂发现使用六甲基磷酰胺作为溶剂对高E / Z选择性至关重要，该方法已用于通过不对称氢化有效合成坦索罗辛的关键手性中间体。 通过用铁还原相应的肟，开发了一种简便实用的制备（E）-β-芳基酰胺[（E）-N-（1-芳基丙-1-烯-2-基]乙酰胺]的方法（II）乙酸盐作为还原剂发现使用六甲基磷酰胺作为溶剂对高E / Z选择性至关重要，该方法已用于通过不对称氢化有效合成坦索罗辛的关键手性中间体。
• Copper‐Catalyzed Aza‐Sonogashira Cross‐Coupling To Form Ynimines: Development and Application to the Synthesis of Heterocycles
  作者：Rémi Lavernhe、Rubén O. Torres‐Ochoa、Qian Wang、Jieping Zhu

  DOI：10.1002/anie.202110901

  日期：2021.11.2

  AbstractNitrogen‐substituted alkynes, such as ynamines and ynamides, are versatile synthetic building blocks. Ynimines bearing additional nucleophilic and electrophilic centers relative to ynamines and ynamides are expected to have high synthetic potential. However, their chemical reactivity remains unexplored owing mainly to the lack of synthetic accessibility. We report herein a versatile copper‐catalyzed synthesis of ynimines from readily available O‐acetyl ketoximes and terminal alkynes. A wide range of O‐acetyl ketoximes derived from diaryl ketones, aryl alkyl ketones and dialkyl ketones underwent cross‐coupling with a diverse set of terminal alkynes to afford the ynimines in good to excellent yields. An unprecedented [5+1] heteroannulation reaction exploiting the reactivity of the ynimine generated in situ was subsequently developed for the synthesis of medicinally important heterocycles, including isoquinolines, azaindoles, azabenzofurans, azabenzothiophenes and carbolines.
• A mild one-pot transformation of nitroalkanes to ketones or aldehydes <i>via</i> a visible-light photocatalysis–hydrolysis sequence
  作者：Yin-Yin Hsu、Sheng-Qi Luo、Bor-Cherng Hong、Su-Ying Chien

  DOI：10.1039/d2ob00267a

  日期：——

  i-PrOH (instead of CH3CN), the transformation of nitroalkanes to the corresponding oximes, rather than nitrones, can be markedly more effective. The oximes can then be hydrolyzed to ketones by reaction with CuCl2·2H2O in a pH 7 buffer solution. This process is appealing because of the benefits of efficient conversion, mild conditions, high yields, and general applicability to compounds with a wide range

  使用具有家用装饰性蓝色 LED 和添加剂 Et 3 N 和 DIPEA 的可见光光氧化还原催化策略，以及随后的水解序列，将硝基烷烃直接转化为相应的酮和醛的温和一锅法，构成已经开发出类似Nef的反应。值得注意的是，通过在 i-PrOH 中使用合适的光催化剂（例如，[Ir(dtbbpy)(ppy) 2 ]PF 6）和额外的添加剂 Et 3 N 以及 DIPEA 和 Mg(ClO 4 ) 2的组合（代替 CH 3CN)，将硝基烷烃转化为相应的肟，而不是硝酮，可以明显更有效。然后可以通过在pH 7缓冲溶液中与CuCl 2 ·2H 2 O反应将肟水解成酮。该方法具有转化效率高、条件温和、产率高以及对具有广泛不稳定官能团的化合物的普遍适用性等优点。