methyl 5-(chlorodifluoromethyl)-3-[4-(trifluoromethyl)phenyl]-4-isoxazolecarboxylate | 159693-15-9

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: methyl 5-(chlorodifluoromethyl)-3-[4-(trifluoromethyl)phenyl]-4-isoxazolecarboxylate
• 英文别名: Methyl 5-[chloro(difluoro)methyl]-3-[4-(trifluoromethyl)phenyl]-1,2-oxazole-4-carboxylate
• CAS: 159693-15-9
• 化学式: C₁₃H₇ClF₅NO₃
• 分子量: 355.648
• InChiKey: OBMOGFZNKVJUFE-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.9
• 重原子数：
  23
• 可旋转键数：
  4
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.23
• 拓扑面积：
  52.3
• 氢给体数：
  0
• 氢受体数：
  9

反应信息

• 作为反应物：
  描述：

  methyl 5-(chlorodifluoromethyl)-3-[4-(trifluoromethyl)phenyl]-4-isoxazolecarboxylate 在 盐酸 、 草酰氯 、 溶剂黄146 、 N,N-二甲基甲酰胺 作用下， 以 二氯甲烷 为溶剂， 反应 73.0h， 生成
  参考文献：
  名称：

  Synthesis and Herbicidal Activity of 3-Aryl-5-(haloalkyl)-4-isoxazolecarboxamides and Their Derivatives

  摘要：

  A series of unique 3-aryl-5-(haloalkyl)-4-isoxazolecarboxamides have been prepared which exhibit, in both greenhouse and field studies, significant preemergent and postemergent herbicidal activity in the grams per hectare range against broadleaf and narrowleaf weeds. The key step in the formation of the fully substituted isoxazole ring 2 is 1,3 dipolar cycloaddition of a haloalkyl-substituted acetylenic ester and a nitrile oxide intermediate. The 3-aryl-5-(halo alkyl)-4-isoxazolecarboxylate esters 2 are converted to isoxazole-4-carboxamide herbicides 5 and 6, secondary amides 7, and amino acid derivatives 8. Greatest activity was observed with compounds having a combination of three substituents: a substituted phenyl ring in the 3-position, a primary or secondary carboxamide in the 4-position, and a difluorochloromethyl group in the, 5-position of the isoxazole ring.

  DOI：

  10.1021/jf00049a040
• 作为产物：
  描述：

  4-(trifluoromethyl)benzaldehyde oxime 在 sodium hydroxide 、 N-氯代丁二酰亚胺 作用下， 以 二氯甲烷 、 N,N-二甲基甲酰胺 为溶剂， 反应 0.25h， 生成 methyl 5-(chlorodifluoromethyl)-3-[4-(trifluoromethyl)phenyl]-4-isoxazolecarboxylate
  参考文献：
  名称：

  Synthesis and Herbicidal Activity of 3-Aryl-5-(haloalkyl)-4-isoxazolecarboxamides and Their Derivatives

  摘要：

  A series of unique 3-aryl-5-(haloalkyl)-4-isoxazolecarboxamides have been prepared which exhibit, in both greenhouse and field studies, significant preemergent and postemergent herbicidal activity in the grams per hectare range against broadleaf and narrowleaf weeds. The key step in the formation of the fully substituted isoxazole ring 2 is 1,3 dipolar cycloaddition of a haloalkyl-substituted acetylenic ester and a nitrile oxide intermediate. The 3-aryl-5-(halo alkyl)-4-isoxazolecarboxylate esters 2 are converted to isoxazole-4-carboxamide herbicides 5 and 6, secondary amides 7, and amino acid derivatives 8. Greatest activity was observed with compounds having a combination of three substituents: a substituted phenyl ring in the 3-position, a primary or secondary carboxamide in the 4-position, and a difluorochloromethyl group in the, 5-position of the isoxazole ring.

  DOI：

  10.1021/jf00049a040

文献信息

• Reaction of benzohydroximinoyl chlorides and β-(trifluoromethyl)-acetylenic esters: Synthesis of regioisomeric (trifluoromethyl)-isoxazolecarboxylate esters and oxime addition products
  作者：Bruce C. Hamper、Kindrick L. Leschinsky

  DOI：10.1002/jhet.5570400404

  日期：2003.7

  triethylamine induced reaction of benzohydroximinoyl chlorides, precursors of nitrile oxides, with β-trifluoromethylacetylenic esters gives rise to three products: 5-trifluoromethyl-4-isoxozolecarboxylate esters, regioisomeric 4-trifluoromethyl-5-isoxazolecarboxylate esters and an unexpected oxime 1,4-addition adduct. Product distribution is rationalized in terms of two competing reaction modes, either 1

  由三乙胺引起的苯甲酰氢氧甲烷酰氯（腈的前体）与β-三氟甲基乙炔酸酯的反应产生三种产物：5-三氟甲基-4-异恶唑羧酸酯，区域异构的4-三氟甲基-5-异恶唑羧酸酯和意外的1,4-肟另外的加合物。根据两种竞争反应模式合理化了产品分布，可以是在乙炔酸酯中1,4加入肟阴离子，或在形成腈氧化物之后再进行1,3偶极环氧化。在低温下，优选将氧亚氨基酰氯与炔属酸酯进行阴离子1,4-加成，而在高于0°C的温度下，优选先形成氧化腈，然后进行环加成。13 C NMR。

表征谱图