甲基2-甲基-5-亚甲基-4,5-二氢-3-呋喃羧酸酯 | 146896-48-2

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 二氢呋喃
• 中文名称: 甲基2-甲基-5-亚甲基-4,5-二氢-3-呋喃羧酸酯
• 英文名称: methyl 2-methyl-5-methylene-4,5-dihydrofuran-3-carboxylate
• 英文别名: 2-methyl-3-methoxyl carbonyl-5-methylene-4,5-dihydrofuran；3-carbomethoxy-4,5-dihydro-2-methyl-5-methylenefuran；3-Furancarboxylicacid,4,5-dihydro-2-methyl-5-methylene-,methylester(9CI)；methyl 5-methyl-2-methylidene-3H-furan-4-carboxylate
• CAS: 146896-48-2
• 化学式: C₈H₁₀O₃
• 分子量: 154.166
• InChiKey: PCZIUQMMVOEWHW-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.2
• 重原子数：
  11
• 可旋转键数：
  2
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.38
• 拓扑面积：
  35.5
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  甲基2-甲基-5-亚甲基-4,5-二氢-3-呋喃羧酸酯 在 Amberlist 作用下， 以 苯 为溶剂， 反应 3.0h， 以65%的产率得到2,5-二甲基-3-呋喃羧酸甲酯
  参考文献：
  名称：

  Elimination reactions of terminal .beta.-oxy selenoxides. Synthesis of aryl and vinyl enol ethers and of furans, oxazoles, and thiazoles

  摘要：

  Elimination reactions of terminal selenoxides holding an alkoxy group in the beta position, RCH-(OR)CH2SeOPh, are usually difficult and can give rise to complex reaction mixtures. We report that these reactions take place more easily whenever the oxygen atom is linked to an unsaturated group (-CH=CHR, -Ar, -CR=O, -CH=NR). These selenoxides are easily available, and the elimination reaction was employed to effect useful syntheses of both open-chain and cyclic aryl and vinyl enol ethers. Moreover, by simple isomerization with acids or bases the cyclic derivatives can be transformed into the corresponding furans. The same procedure has been employed to synthesize substituted oxazoles and thiazoles also.

  DOI：

  10.1021/jo00058a011
• 作为产物：
  描述：

  methyl 2-methyl-5-((phenylselanyl)methyl)-4,5-dihydrofuran-3-carboxylate 在 双氧水 、 碳酸氢钠 作用下， 以 甲醇 、 苯 为溶剂， 反应 22.0h， 生成 甲基2-甲基-5-亚甲基-4,5-二氢-3-呋喃羧酸酯
  参考文献：
  名称：

  Elimination reactions of terminal .beta.-oxy selenoxides. Synthesis of aryl and vinyl enol ethers and of furans, oxazoles, and thiazoles

  摘要：

  Elimination reactions of terminal selenoxides holding an alkoxy group in the beta position, RCH-(OR)CH2SeOPh, are usually difficult and can give rise to complex reaction mixtures. We report that these reactions take place more easily whenever the oxygen atom is linked to an unsaturated group (-CH=CHR, -Ar, -CR=O, -CH=NR). These selenoxides are easily available, and the elimination reaction was employed to effect useful syntheses of both open-chain and cyclic aryl and vinyl enol ethers. Moreover, by simple isomerization with acids or bases the cyclic derivatives can be transformed into the corresponding furans. The same procedure has been employed to synthesize substituted oxazoles and thiazoles also.

  DOI：

  10.1021/jo00058a011

文献信息

• Base- and Copper-Catalyzed Intramolecular Cyclization for the Direct Synthesis of Dihydrofurans
  作者：Yong-Fei Chen、Hai-Fei Wang、Ya Wang、Yong-Chun Luo、Hai-Liang Zhu、Peng-Fei Xu

  DOI：10.1002/adsc.201000005

  日期：——

  has been developed from the cyclization of 2‐propynyl‐1,3‐dicarbonyl compounds catalyzed by potassium tert‐butoxide, copper(II) trifluoromethanesulfonate and triphenylphosphine using methanol/dichloromethane as the solvent under very mild conditions. Moreover, dihydrofurans could be easily transformed into the corresponding furans in the presence of trifluoroacetic acid.

  叔丁醇钾，三氟甲烷磺酸铜（II）和三苯基膦在非常温和的条件下以叔丁醇钾，三氟甲烷磺酸铜（II）和三苯膦为催化剂，环化了2-丙炔基-1,3-二羰基化合物，从而开发出一种简便的合成二氢呋喃的方法。。而且，在三氟乙酸的存在下，二氢呋喃可以容易地转化成相应的呋喃。
• Iridium‐Catalyzed Asymmetric Allylic Aromatization Reaction
  作者：Xi‐Jia Liu、Chao Zheng、Yi‐Han Yang、Shicheng Jin、Shu‐Li You

  DOI：10.1002/anie.201904156

  日期：2019.7.29

  Described herein is an asymmetric allylic aromatization (AAAr) strategy that employs readily accessible equivalents of benzylic nucleophiles in iridium‐catalyzed allylic substitution reactions with the concomitant formation of aromatic rings by aromatization. The optimized reaction conditions involving a catalyst derived from a commercially available iridium precursor and the Carreira ligand are compatible

  本文描述的是一种不对称的烯丙基芳构化（AAAr）策略，该方法在铱催化的烯丙基取代反应中采用易于接近的苄基亲核试剂等价物，并伴随通过芳构化形成芳环。优化的反应条件涉及衍生自市售铱前体和Carreira配体的催化剂，可与衍生自4-或5-甲基恶唑，5-甲基噻唑，4-或5-甲基呋喃，2-或3-呋喃的苄基亲核试剂的当量相容甲基苯并呋喃，3-甲基苯并噻吩，3-甲基吲哚，1-甲基萘和甲基苯。该策略提供对映纯形式的直接获得有价值的杂环芳香族化合物的方法，该芳香族芳香族化合物带有对映纯形式的均具有苄基立体异构中心。
• CuI-catalyzed intramolecular O-vinylation of carbonyl compounds
  作者：Yewen Fang、Chaozhong Li

  DOI：10.1039/b505006e

  日期：——

  The first copper-catalyzed intramolecular O-vinylation of carbonyl compounds with vinyl bromides was reported, among which the efficient formation of 5-, 6- and even 7-membered cyclic alkenyl ethers was achieved with β-ketoesters as nucleophiles.

  首次报道了铜催化的羰基化合物与乙烯基溴化物之间的分子内O-乙烯化反应，其中使用β-酮酯作为亲核试剂，成功合成了5、6甚至7元环烯基醚。
• An Efficient and General Microwave-Assisted Copper-Catalyzed Conia-Ene Reaction of Terminal and Internal Alkynes Tethered to a Wide Variety of Carbonucleophiles
  作者：Sonia Montel、Didier Bouyssi、Geneviève Balme

  DOI：10.1002/adsc.201000351

  日期：2010.9.10

  This paper describes a highly efficient, microwave‐assisted, Conia‐ene reaction of alkynes bearing a stabilizing carbon nucleophile. The reaction, catalyzed by a commercially available copper catalyst, proceeds under neutral conditions and is generally applicable even to less reactive nucleophiles such as malonate, cyanoacetate, and sulfonylacetate derivatives. This copper‐mediated cycloisomerization

  本文描述了带有稳定碳亲核试剂的炔烃的高效微波辅助的Conia-ene反应。由市售铜催化剂催化的反应在中性条件下进行，并且通常甚至适用于反应性较低的亲核试剂，如丙二酸酯，氰基乙酸酯和磺酰乙酸酯衍生物。这种铜介导的环异构化也适用于内部未活化的炔烃，仅导致相应的具有E烯烃化学性质的五元产物。
• W(CO)5(L)-Catalyzed Cyclization of α-Alkynyl-β-dicarbonyl Derivatives: Synthesis of Methylenelactones, Furans, and Methylenecyclopentanes
  作者：Sunggak Kim、Xiangjian Meng

  DOI：10.1055/s-0032-1316536

  日期：2012.8

  W(CO)(5)(L)-Catalyzed cyclization of alpha-alkynyl-beta-keto acids, keto esters, and diketones provides methylenelactones, furans, and methylenecyclopentanes via 5-exo-dig cyclization. Also, the present approach can be further applied to 5-endo-dig cyclization.