3-(1-methylethoxy)-4-methylcyclobut-3-ene-1,2-dione | 114094-69-8

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 3-(1-methylethoxy)-4-methylcyclobut-3-ene-1,2-dione
• 英文别名: 3-methyl-4-(1-methylethoxy)-3-cyclobutene-1,2-dione；3-methyl-4-(1-methylethoxy)cyclobutene-1,2-dione；1,2-dioxo-3-isopropyloxy-4-methyl-3-cyclobutene；3-isopropoxy-4-methyl-3-cyclobutene-1,2-dione；3-isopropoxy-4-methylcyclobut-3-ene-1,2-dione；4-methyl-3-isopropoxycyclobutene-1,2-dione；3-methyl-4-propan-2-yloxycyclobut-3-ene-1,2-dione
• CAS: 114094-69-8
• 化学式: C₈H₁₀O₃
• 分子量: 154.166
• InChiKey: OZOYNWQSFNTBNE-UHFFFAOYSA-N

物化性质

• 沸点：
  244.4±50.0 °C(Predicted)
• 密度：
  1.12±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  0.9
• 重原子数：
  11
• 可旋转键数：
  2
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  43.4
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  3-(1-methylethoxy)-4-methylcyclobut-3-ene-1,2-dione 在 盐酸 、 水 作用下， 以 丙酮 为溶剂， 反应 0.5h， 以96%的产率得到3-Hydroxy-4-methyl-3-cyclobutene-1,2-dione
  参考文献：
  名称：

  方酸衍生物的无水质子电导率。

  摘要：

  在本文中，我们介绍了方酸衍生物作为无水质子导体。我们报告了四种方酸衍生物的合成，表征和质子电导率。一种衍生物的无水质子电导率在110摄氏度下为2.3 x 10（-3）S cm（-1），与熔融的1H-1,2,3-三唑或1H-咪唑的电导率相当。

  DOI：

  10.1039/c2cc31283b
• 作为产物：
  描述：

  1,1-dimethylethyl 3,4-dioxo-2-(1-methylethoxy)-1-cyclobutene-1-acetate 在 三氟乙酸 、 三乙胺 作用下， 以 二氯甲烷 为溶剂， 反应 8.25h， 以59%的产率得到3-(1-methylethoxy)-4-methylcyclobut-3-ene-1,2-dione
  参考文献：
  名称：

  Efficient Synthesis of a Novel 4-Hydroxy-2,3-dioxocyclobut-1-enyl Group Containing Amino Acids

  摘要：

  [GRAPHICS]Syntheses of novel amino acids possessing a squaryl group, 1-3, in an optically active form are described. The syntheses of 1-3 were conducted by a concise route involving (1) an aldol addition of an enolate derived from Gly, L-Asp, or L-Glu to diisopropyl squarate (4) and (2) an efficient decarboxylation of the aldol adducts based on the electron-withdrawing property of the squaryl group. Introducing N-protected group to 2 and 3 and peptide formation reactions are also described.

  DOI：

  10.1021/ol990286g

文献信息

• [EN] 2,6-QUINOLINYL AND 2,6-NAPHTHYL DERIVATIVES, PROCESSES FOR PREPARING THEM AND THEIR USES AS VLA-4 INHIBITORS<br/>[FR] DERIVES DE 2,6-QUINOLINYLE ET DE 2,6-NAPHTYLE, LEURS PROCEDES DE PREPARATION ET LEUR UTILISATION COMME INHIBITEURS DE VLA-4
  申请人：UCB SA

  公开号：WO2003093237A1

  公开（公告）日：2003-11-13

  The present invention concerns 2,6-quinolinyl and 2,6-naphthyl derivatives of formula (I), processes for preparing them, pharmaceutical compositions containing them and their use as pharmaceuticals for the treatment of VLA-4 dependent inflammatory diseases such as for example asthma, allergic rhinitis, sinusitis, conjunctivitis, food allergy, psoriasis, urticaria, pruritus, eczema, rheumatoid arthritis, inflammatory bowel disease, multiple sclerosis and atherosclerosis. Formula (I): wherein X is N or CH.

  本发明涉及式(I)的2,6-喹啉基和2,6-萘基衍生物，制备它们的方法，含有它们的药物组合物以及它们作为治疗VLA-4依赖性炎症性疾病的药物的用途，例如哮喘、过敏性鼻炎、鼻窦炎、结膜炎、食物过敏、牛皮癣、荨麻疹、瘙痒、湿疹、类风湿关节炎、炎症性肠病、多发性硬化和动脉粥样硬化等。式(I)：其中X为N或CH。
• Titanium-mediated olefinations of cyclobutenedione derivatives
  作者：Nicos A Petasis、Yong-Han Hu、Dian-Kui Fu

  DOI：10.1016/0040-4039(95)01186-l

  日期：1995.8

  A variety of cyclobutenedione derivatives, including squaric esters, react with dimethyl titanocene to afford the corresponding methylenation products. With certain mixed-substituted substrates the reaction proceeds preferably at a ketonic carbonyl rather than a vinylogous ester.

  各种环丁烯二酮衍生物（包括方酸酯）与二甲基钛茂反应，得到相应的亚甲基化产物。对于某些混合取代的底物，反应优选在酮羰基而不是乙烯基酯上进行。
• Antimigraine cyclobutenedione derivatives of indolylalkyl-pyridinyl and
  申请人：Bristol-Myers Squibb Company

  公开号：US05521188A1

  公开（公告）日：1996-05-28

  A series of novel 5-cyclobutenedione derivatives of indolylalkylpiperazinyl pyridines and pyrimidines of Formula I are intended for use in the alleviation of vascular headaches. ##STR1##

  一系列新颖的Formula I中的吲哚基烷基哌嗪基吡啶和嘧啶的5-环丁二酮衍生物旨在用于缓解血管性头痛。
• Oxy-Cope Rearrangements of Bicyclo[3.2.0]heptenones. Synthesis of Bicyclo[4.2.1]non-1(4)-en-6-ones and Bicyclo[5.2.1]dec-1(10)-en-5-ones
  作者：Sharad K. Verma、Que H. Nguyen、James M. MacDougall、Everly B. Fleischer、Harold W. Moore

  DOI：10.1021/jo991765w

  日期：2000.6.1

  1]non-1(4)-en-6-ones and the latter to the first examples of bicyclo[5.2.1]dec-1(10)-en-5-ones, compounds having exceptionally strained bridgehead double bonds. The transformations are controlled by the 6-exo-methyl group in the starting material along with the substituent at position-1 (bridgehead) which force attack of the lithium reagent from the concave face of the starting material, thus allowing the cyclopentenyl

  6-异-甲基双环[3.2.0]庚-7-酮及其2-亚烷基类似物可容易地由二烷基二烷基酯制备。这些化合物在用乙烯基锂处理后会发生面部氧-Cope环膨胀；前者导致双环[4.2。1] non-1（4）-en-6-ones和后者为双环[5.2.1] dec-1（10）-en-5-ones的第一个实例，这些化合物具有异常应变的桥头双键。转化受起始材料中的6-外甲基以及位置1（桥头）上的取代基控制，该取代基迫使锂试剂从起始材料的凹面进攻，从而形成环戊烯基或亚烷基参加大型活动。
• Four-Electron Electrocyclic Ring-Opening/Intermolecular [4+2] Cycloadditions of α-Hydroxycyclobutenones: Stereoselective Synthesis of Multiple Substituted δ-Lactams
  作者：Peidong Song、Qing Li、Congcong Wang、Wenfa Wu、Xu Mao、Jiajia Wang、Xiangdong Hu

  DOI：10.1002/adsc.201501152

  日期：2016.4.14

  four‐electron electrocyclic ring‐opening/intermolecular [4+2] cycloaddition of α‐hydroxycyclobutenones is reported. The reaction represents the first example for the intermolecular cycloaddition of the extensively studied enol‐ketene intermediate, and provides a new synthetic route to multiply substituted δ‐lactams in high stereoselectivity.

  报道了α-羟基环丁烯酮的四电子开环/分子间[4 + 2]环加成反应。该反应代表了广泛研究的烯醇-烯酮中间体的分子间环加成反应的第一个实例，并为在高立体选择性下取代取代的δ-内酰胺提供了一条新的合成途径。