3-甲基-5-(三氯甲基)-4H-1,2-恶唑-5-醇 | 135351-22-3

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑啉类
• 中文名称: 3-甲基-5-(三氯甲基)-4H-1,2-恶唑-5-醇
• 英文名称: 3-methyl-5-hydroxy-5-trichloromethyl-4,5-dihydroisoxazole
• 英文别名: 5-Isoxazolol, 4,5-dihydro-3-methyl-5-(trichloromethyl)-；3-methyl-5-(trichloromethyl)-4H-1,2-oxazol-5-ol
• CAS: 135351-22-3
• 化学式: C₅H₆Cl₃NO₂
• 分子量: 218.467
• InChiKey: NCQUGHQZHYBEAX-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.3
• 重原子数：
  11
• 可旋转键数：
  0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.8
• 拓扑面积：
  41.8
• 氢给体数：
  1
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  3-甲基-5-(三氯甲基)-4H-1,2-恶唑-5-醇 在 硫酸 作用下， 以 水 为溶剂， 生成 3-甲基异恶唑-5-甲酸
  参考文献：
  名称：

  Synthesis and structure of new trichloromethyl-β-diketones — 5-Trichloromethylisoxazole and 5-isoxazolecarboxylic acid derivatives

  摘要：

  一种改进的方法用于合成一系列新的三氯甲基-β-二酮，包括1,1,1-三氯戊二酮（2a）、1,1,1-三氯-3-甲基己二酮（2b）、4,4,4-三氯-1-苯基丁二酮（2c）、4,4,4-三氯-2-甲基-1-苯基丁二酮（2d）、2-三氯乙酰环己酮（2e）、4-叔丁基环己酮（2f）、4-叔丁基环庚酮（2g）和4-叔丁基环辛酮（2h）。多核NMR研究表明，β-二羰基化合物2b和2d至2h主要以酮形式存在，而2a和2c以烯醇形式存在。三氯甲基-β-二酮与盐酸羟胺反应，生成三组异噁唑衍生物。关键词：缩醛，酰化，三氯甲基-1,3-二酮，2-三氯乙酰环烷酮，异噁唑，环缩合。

  DOI：

  10.1139/v05-130
• 作为产物：
  描述：

  1,1,1-trichloro-4-methoxy-3-penten-2-one 在 盐酸羟胺 作用下， 以 水 为溶剂， 反应 0.5h， 以89%的产率得到3-甲基-5-(三氯甲基)-4H-1,2-恶唑-5-醇
  参考文献：
  名称：

  Synthesis in Water and Antimicrobial Activity of 5-Trichloromethyl-4,5-dihydroisoxazoles

  摘要：

  Two series of 5-trichloromethylisoxazoles were synthesized from the cyclocondensation of 1,1,1-trichloro-4-methoxy-3-alken-2-ones [Cl3CC(O)C(R-2)=C(R-1)OMe, where R-1=H, Me, Et, Pr, iso-Pr, cyclo-Pr, Bu, terc-Bu, CH2Br, CHBr2, CH(Me)SMe, (CH2)(2)Ph, and Ph, and R-2=H; R-1=H and R-2=Me and Et; R-1 and R-2=-(CH2)(4)- and -(CH2)(5)-; and R-1=Et and Ph and R-2=Me] with hydroxylamine hydrochloride through a rapid one-pot reaction in water. The 5-trichloromethyl-4,5-dihydroisoxazoles were aromatized by reaction with concentrated sulfuric acid to obtain the respective 5-trichloromethylisoxazoles. Their structures were confirmed by elemental analysis, H-1/C-13 nuclear magnetic resonance, and electron impact mass spectroscopy. Crystal structure analysis for 5-triclhoromethyl-5-hydroxy-3-propyl-4,5-dihydroisoxazole (2d) and 5-trichloromethyl-5-hydroxy-3,4-hexamethylene-4,5-dihydroisoxazole (2o) is presented. The antimicrobial activities of the 5-trichloromethyl-4,5-dihydroisoxazole derivatives were examined using the standard twofold dilution method against Gram-positive bacteria (Staphylococcus aureus), Gram-negative bacteria (Escherichia coli and Pseudomonas aeruginosa), and yeasts (Candida spp. and Cryptococcus neoformans). All of the tested 5-trichloromethyldihydroisoxazoles exhibited antibacterial and antifungal activities at the tested concentrations. Supplemental materials are available for this article. Go to the publisher's online edition of Synthetic Communications (R) to view the free supplemental file.

  DOI：

  10.1080/00397911.2012.706349

文献信息

• Trihaloacetylated Enol Ethers - General Synthetic Procedure and Heterocyclic Ring Closure Reactions with Hydroxylamine
  作者：Agenor Colla、Marcos A. P. Martins、Günter Clar、Siegfried Krimmer、Peter Fischer

  DOI：10.1055/s-1991-26501

  日期：——

  An improved procedure is described for preparing ß-trichloro- and ß-trifluoroacetyl derivatives of six simple enol ethers, in analytically pure form, high yield, and on an up to molar scale. The 4-alkoxy-1,1,1-trichloro [fluoro]-3-alken-2-ones 4a-c and 5a-c, thus obtained, are cyclocondensed with hydroxylamine hydrochloride (in pyridine, 35°C to afford the 5-hydroxy-5-trichloro[fluoro]methyl-4,5-dihydroisoxazoles 6 and 7 in high yield. With cyclic substrates, i.e. the trihaloacetyl dihydrofurans and -2H-pyrans 4d, e and 5d, e, a competitive rearrangement reaction gives 3-cyano-2-hydroxy-2-trichloro[fluoro]methyltetrahydrofurans and -2H-pyrans 8 and 9, respectively. Direct condensation to a dihydroisoxazole prevails at 0°C (> 85% for 4d, 5d), rearrangement to the cyano compounds at higher temperatures (65-70°C, > 70%). Under either condition, the respective heterocycle may be isolated in > 60% yield (except for 6e).

  描述了一种改进的方法，用于制备六种简单烯醇醚的 β-三氯-和 β-三氟乙酰基衍生物，其分析纯形式、高产率和高达摩尔规模。将由此获得的4-烷氧基-1,1,1-三氯[氟]-3-链烯-2-酮4a-c和5a-c与盐酸羟胺(在吡啶中，35℃)环缩合，得到5 -羟基-5-三氯[氟]甲基-4,5-二氢异恶唑 6 和 7 以高产率与环状底物，即三卤乙酰基二氢呋喃和 -2H-吡喃 4d, e 和 5d, e 进行竞争性重排反应，得到 3 -氰基-2-羟基-2-三氯[氟]甲基四氢呋喃和-2H-吡喃8和9分别在0°C下直接缩合为二氢异恶唑（4d、5d时> 85%），重排为氰基化合物。在较高温度下（65-70°C，> 70%），在任一条件下，各自的杂环都可以以> 60% 的产率分离（6e 除外）。
• Microwave assisted synthesis of 5-hydroxy-5-trichloromethyl-4,5-dihydroisoxazoles
  作者：Marcos A.P Martins、Paulo Beck、Wilson Cunico、Claudio M.P Pereira、Adilson P Sinhorin、Rogério F Blanco、Rodrigo Peres、Helio G Bonacorso、Nilo Zanatta

  DOI：10.1016/s0040-4039(02)01555-1

  日期：2002.9

  A series of 13 5-hydroxy-5-trichloromethyl-4,5-dihydroisoxazoles have been synthesized in 78-96% yield by environmentally benign microwave induced techniques involving the cyclocondensation of 4-alkoxy-1,1,1-trichloro-3-alken-2-ones [CCl3C(O)C(R-2)=C(R-1)OR, where R-2=H, alkyl; R-1=H, alkyl, aryl and R=H, alkyl] with hydroxylamine using toluene as solvent. The advantages obtained by the use of microwave irradiation in relation to a classical method were demonstrated. (C) 2002 Elsevier Science Ltd. All rights reserved.
• Synthesis and structure of new trichloromethyl-β-diketones — 5-Trichloromethylisoxazole and 5-isoxazolecarboxylic acid derivatives
  作者：Marcos A.P Martins、Sergio Brondani、Victor L Leidens、Darlene C Flores、Sidnei Moura、Nilo Zanatta、Manfredo Hörner、Alex FC Flores

  DOI：10.1139/v05-130

  日期：2005.8.1

  An improved method for the synthesis of a new series of trichloromethyl-β-diketones including 1,1,1-trichloropentan-2,4-dione (2a), 1,1,1-trichloro-3-methylhexan-2,4-dione (2b), 4,4,4-trichloro-1-phenylbutan-1,3-dione (2c), 4,4,4-trichloro-2-methyl-1-phenylbutan-1,3-dione (2d), 2-trichloroacetylcyclohexanone (2e), 4-tert-butylcyclohexanone (2f), 4-tert-butylcycloheptanone (2g), and 4-tert-butylcyclooctanone (2h) is reported. A multinuclear NMR study showed that β-dicarbonyl compounds 2b and 2d–2h are predominantly in the keto form and 2a and 2c are in the enol form. The trichloromethyl-β-diketones react with hydroxylamine hydrochloride leading to three sets of isoxazole derivatives.Key words: acetals, acylation, trichloromethyl-1,3-diketones, 2-trichloroacetylcycloalkanones, isoxazoles, cyclocondensation.

  一种改进的方法用于合成一系列新的三氯甲基-β-二酮，包括1,1,1-三氯戊二酮（2a）、1,1,1-三氯-3-甲基己二酮（2b）、4,4,4-三氯-1-苯基丁二酮（2c）、4,4,4-三氯-2-甲基-1-苯基丁二酮（2d）、2-三氯乙酰环己酮（2e）、4-叔丁基环己酮（2f）、4-叔丁基环庚酮（2g）和4-叔丁基环辛酮（2h）。多核NMR研究表明，β-二羰基化合物2b和2d至2h主要以酮形式存在，而2a和2c以烯醇形式存在。三氯甲基-β-二酮与盐酸羟胺反应，生成三组异噁唑衍生物。关键词：缩醛，酰化，三氯甲基-1,3-二酮，2-三氯乙酰环烷酮，异噁唑，环缩合。
• Synthesis in Water and Antimicrobial Activity of 5-Trichloromethyl-4,5-dihydroisoxazoles
  作者：Alex F. C. Flores、Luciana A. Piovesan、Alynne A. Souto、Mariano A. Pereira、Marcos A. P. Martins、Tatiane L. Balliano、Givanildo S. da Silva

  DOI：10.1080/00397911.2012.706349

  日期：2013.9.2

  Two series of 5-trichloromethylisoxazoles were synthesized from the cyclocondensation of 1,1,1-trichloro-4-methoxy-3-alken-2-ones [Cl3CC(O)C(R-2)=C(R-1)OMe, where R-1=H, Me, Et, Pr, iso-Pr, cyclo-Pr, Bu, terc-Bu, CH2Br, CHBr2, CH(Me)SMe, (CH2)(2)Ph, and Ph, and R-2=H; R-1=H and R-2=Me and Et; R-1 and R-2=-(CH2)(4)- and -(CH2)(5)-; and R-1=Et and Ph and R-2=Me] with hydroxylamine hydrochloride through a rapid one-pot reaction in water. The 5-trichloromethyl-4,5-dihydroisoxazoles were aromatized by reaction with concentrated sulfuric acid to obtain the respective 5-trichloromethylisoxazoles. Their structures were confirmed by elemental analysis, H-1/C-13 nuclear magnetic resonance, and electron impact mass spectroscopy. Crystal structure analysis for 5-triclhoromethyl-5-hydroxy-3-propyl-4,5-dihydroisoxazole (2d) and 5-trichloromethyl-5-hydroxy-3,4-hexamethylene-4,5-dihydroisoxazole (2o) is presented. The antimicrobial activities of the 5-trichloromethyl-4,5-dihydroisoxazole derivatives were examined using the standard twofold dilution method against Gram-positive bacteria (Staphylococcus aureus), Gram-negative bacteria (Escherichia coli and Pseudomonas aeruginosa), and yeasts (Candida spp. and Cryptococcus neoformans). All of the tested 5-trichloromethyldihydroisoxazoles exhibited antibacterial and antifungal activities at the tested concentrations. Supplemental materials are available for this article. Go to the publisher's online edition of Synthetic Communications (R) to view the free supplemental file.