1-(thiophen-2-yl)pent-4-en-1-one | 59304-44-8

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 1-(thiophen-2-yl)pent-4-en-1-one
• 英文别名: 1-thiophen-2-ylpent-4-en-1-one
• CAS: 59304-44-8
• 化学式: C₉H₁₀OS
• 分子量: 166.244
• InChiKey: UMQJUMQJBPQOLL-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.3
• 重原子数：
  11
• 可旋转键数：
  4
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.22
• 拓扑面积：
  45.3
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  1-(thiophen-2-yl)pent-4-en-1-one 在 sodium azide 、 碘苯二乙酸 、 双氧水 、 三苯基膦 作用下， 以 甲醇 、 二氯甲烷 、 苯 为溶剂， 反应 13.25h， 生成 2-(2-噻吩基)吡啶
  参考文献：
  名称：

  Synthesis of nitrogen-containing heterocycles from the azido-selenenylation products of unsaturated carbonyl compounds

  摘要：

  Terminal alkenes containing a remote carbonyl group reacted with iodobenzene diacetate, diphenyl diselenide, and sodium azide to afford the products of azido-phenylselenenylation of the double bond. Owing to its radical nature, this reaction proceeded with complete anti-Markovnikov regioselectivity. Under the influence of triphenylphosphine in benzene the azido group reacted with the carbonyl function to afford the corresponding ring-closure reaction products containing a carbon nitrogen double bond. Thus, starting from beta,gamma- or gamma,delta-unsaturated esters, the corresponding cyclic imino ethers were obtained. These could not be isolated but were directly transformed into beta-(phenylseleno) gamma-lactams or gamma-(phenylseleno) delta-lactams. The phenylseleno derivatives of tetrahydropyridine were formed starting both from gamma,delta-unsaturated ketones and from alpha-allyl beta-keto esters. In the latter case, the cyclization reaction is chemoselective and involves the ketonic carbonyl. The oxidation of these compounds with hydrogen peroxide directly produced the corresponding pyridines via selenoxide elimination followed by dehydrogenation. This simple reaction sequence represents a very useful general method to build up a 2-substituted pyridine ring. Several alkyl-, aryl-, and heteroarylpyridines, bipyridines, and a terpyridine have been prepared.

  DOI：

  10.1021/jo00074a042
• 作为产物：
  描述：

  2-噻吩甲酸 在 碘 、 magnesium 、 N,N'-羰基二咪唑 作用下， 以 乙醚 、 二氯甲烷 为溶剂， 反应 4.5h， 生成 1-(thiophen-2-yl)pent-4-en-1-one
  参考文献：
  名称：

  邻位取代苯的饱和生物甾体。

  摘要：

  合成，表征和验证了邻二取代苯（双环[2.1.1]己烷）的饱和生物等排体。这些核心被并入了生物活性化合物Valsartan，Boskalid和Fluxapyroxad，而不是苯环。饱和类似物显示出与Boskalid和Fluxapyroxad相似的抗真菌活性。

  DOI：

  10.1002/anie.202004183

文献信息

• Iminyl-Radicals by Oxidation of α-Imino-oxy Acids: Photoredox-Neutral Alkene Carboimination for the Synthesis of Pyrrolines
  作者：Heng Jiang、Armido Studer

  DOI：10.1002/anie.201706270

  日期：2017.9.25

  α‐imino‐oxy propionic acids for the generation of iminyl radicals has been accomplished through the use of Ir(dFCF3ppy)2(dtbbpy)PF6 as a photoredox catalyst. Different from visible‐light‐promoted homolysis and single‐electron reduction of oxime derivatives, this strategy provides a novel catalytic cycle for alkene carboimination through a sequence comprising N‐radical generation, iminyl radical cyclization,

  通过使用Ir（dFCF 3 ppy）2（dtbbpy）PF 6作为光氧化还原催化剂，可以实现α-亚氨基氧丙酸在可见光促进下的脱羧，从而生成亚胺基。与可见光促进的肟衍生物的均质分解和单电子还原不同，该策略通过包括N自由基生成，亚胺基自由基环化，向Michael受体添加分子间共轭物和单个在整个氧化还原中性过程中电子还原以提供各种吡咯啉衍生物。由这种合成方法制备的吡咯啉衍生物可以容易地构建吲哚并立定生物碱骨架。
• Iron-catalyzed carbonylative cyclization of γ,δ-unsaturated aromatic oxime esters to functionalized pyrrolines
  作者：Youcan Zhang、Zhiping Yin、Hai Wang、Xiao-Feng Wu

  DOI：10.1039/d0cc02784g

  日期：——

  Herein, a new method of iron-catalyzed carbonylative cyclization of γ,δ-unsaturated aromatic oxime esters to functionalized pyrrolines has been developed. By using readily available substrates, 32 examples of functionalized pyrrolines were prepared in moderate to good yields. Notably, examples of reduction and cycloaddition reactions of the obtained product were given as well.

  在此，开发了铁催化的γ，δ-不饱和芳族肟酯羰基化成官能化吡咯的新方法。通过使用容易获得的底物，以中等至良好的产率制备了32个官能化吡咯啉的实例。值得注意的是，还给出了所得产物的还原和环加成反应的实例。
• Polarity Umpolung Strategy for the Radical Alkylation of Alkenes
  作者：Jige Liu、Shuo Wu、Jiajia Yu、Chenxi Lu、Zhen Wu、Xinxin Wu、Xiao‐Song Xue、Chen Zhu

  DOI：10.1002/anie.201915837

  日期：2020.5.18

  Free radical-mediated alkylation of general alkenes is a challenging and largely unmet goal. Herein, we disclose a conceptually novel "polarity umpolung" strategy for radical alkylation of alkenes using a portfolio of easily-accessed, dual-function alkylating reagents. This is achieved by substituting inherently nucleophilic alkyl radicals with electrophilic sulfone-decorated surrogates, thus inverting

  自由基介导的一般烯烃的烷基化是一个具有挑战性且很大程度上未实现的目标。在这里，我们公开了一种概念上新颖的“极性化学极化”策略，该策略使用易于获得的双功能烷基化试剂进行烯烃的自由基烷基化。这可以通过用亲电砜修饰的替代物取代固有的亲核烷基自由基，从而改变通常的反应方式。随着烷基化，额外的杂芳基或肟基通过连续的对接和迁移过程同时并入烯烃，从而产生有价值的产品。该反应在温和条件下显示出宽泛的官能团耐受性。该协议为复杂的天然产物和含有烯烃部分的药物分子的后期修饰打开了新的前景。
• Radical Aza-Cyclization of α-Imino-oxy Acids for Synthesis of Alkene-Containing <i>N</i>-Heterocycles via Dual Cobaloxime and Photoredox Catalysis
  作者：Jia-Lin Tu、Jia-Li Liu、Wan Tang、Ma Su、Feng Liu

  DOI：10.1021/acs.orglett.0c00224

  日期：2020.2.7

  Nitrogen-containing heterocycles are prevalent in both naturally and synthetically bioactive molecules. We report herein an unprecedented protocol for radical aza-cyclization of α-imino-oxy acids with pendant alkenes via synergistic photoredox and cobaloxime catalysis. With or without alkenes as the intermolecular cross-coupling partners, the transformation provides a variety of corresponding alkene-containing dihydropyrrole

  天然和合成生物活性分子中都普遍存在含氮杂环。我们在本文中报道了一种空前的协议，用于通过协同光氧化还原和钴肟催化的α-亚氨基-氧酸与侧链烯烃的氮杂氮环化。在有或没有烯烃作为分子间交叉偶联伴侣的情况下，转化以令人满意的产率提供了多种相应的含烯烃的二氢吡咯产物。在存在外部烯烃的情况下，串联反应产生具有优异的化学和立体选择性的E-选择性偶联产物。
• Highly Enantioselective Construction of Dihydrooxazines via Pd-Catalyzed Asymmetric Carboetherification
  作者：Na Li、Baozhen Sun、Shuang Liu、Jinbo Zhao、Qian Zhang

  DOI：10.1021/acs.orglett.9b04123

  日期：2020.1.3

  Pd-catalyzed asymmetric carboetherification of γ,δ-alkenyl oximes with (hetero)aryl and alkenyl halides in the presence of a commercially available bisphosphine ligand. The enantioenriched products can be facilely converted to functionalized alcohols with high fidelity of chiral transfer.

  在市售双膦存在下，Pd催化γ，δ-烯基肟与（杂）芳基和烯基卤化物的不对称碳醚化反应，可以实现高度对映体富集的5,6-二氢-4H-1,2-恶嗪的直接合成。配体。富含对映体的产物可以容易地转化为具有高保真度的手性转移的官能化醇。