ethyl (Z)-3-(difluoromethyl)but-2-enoate | 143266-33-5

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 脂肪酰基
• 英文名称: ethyl (Z)-3-(difluoromethyl)but-2-enoate
• 英文别名: ethyl (Z)-3-(difluoromethyl)-2-butenoate；ethyl (2Z)-4,4-difluoro-3-methylbut-2-enoate；ethyl (Z)-4,4-difluoro-3-methylbut-2-enoate
• CAS: 143266-33-5
• 化学式: C₇H₁₀F₂O₂
• 分子量: 164.152
• InChiKey: SEXJBDFDPSUHHP-PLNGDYQASA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.2
• 重原子数：
  11
• 可旋转键数：
  4
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.57
• 拓扑面积：
  26.3
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  ethyl (Z)-3-(difluoromethyl)but-2-enoate 在 二异丁基氢化铝 、 三乙胺 作用下， 以 乙醚 、 二氯甲烷 、 环己烷 为溶剂， 反应 1.25h， 生成 (Z)-3-(difluoromethyl)-2-butenyl methanesulfonate
  参考文献：
  名称：

  Dimethylallyltryptophan synthase. An enzyme-catalyzed electrophilic aromatic substitution

  摘要：

  Dimethylallyltryptophan (DMAT) synthase catalyzes the alkylation of L-tryptophan at C(4) by dimethylallyl diphosphate (DMAPP) in the first pathway-specific step in the biosynthesis of ergot alkaloids. The mechanism of the reaction was studied with analogs of both substrates. Five 7-substituted derivatives of N-acetyltryptophan (2, Z = OCH3, CH3, F, CF3, and NO2) were synthesized. The L enantiomers of the free amino acids were obtained by selective hydrolysis of the racemate using aminoacylase from Aspergillus. In addition, the E and Z fluoromethyl and difluoromethyl analogs of DMAPP (1, Y = CH3, CH2F, CHF2) were prepared. Rates of the enzyme-catalyzed reactions were measured for the dimethylallyl derivatives with L-tryptophan and for the L-tryptophan derivatives with DMAPP. In addition, the relative reactivities of the methanesulfonate derivatives of the DMAPP analogs were determined for solvolysis in aqueous acetone. A Hammett plot for the tryptophan analogs gave a good linear correlation with rho = -2.0. In addition, a Hammett plot of the logarithms of the relative rates of solvolysis and enzyme-catalyzed alkylation gave a positive linear correlation. These results indicate that the prenyl-transfer reaction catalyzed by DMAT synthase is an electrophilic aromatic substitution and is mechanistically similar to the electrophilic alkylation catalyzed by farnesyl diphosphate synthase.

  DOI：

  10.1021/ja00045a004
• 作为产物：
  描述：

  1,1-二氟丙酮 、 乙氧甲酰基亚甲基三苯基膦 以 异丙醚 为溶剂， 反应 80.0h， 生成 ethyl (Z)-3-(difluoromethyl)but-2-enoate 、 ethyl (E)-3-(difluoromethyl)but-2-enoate
  参考文献：
  名称：

  氟化异戊烯基腺嘌呤：合成和细胞分裂素活性。

  摘要：

  由简单的氟化酮合成了在烯丙基位置带有一个或两个氟原子的N 6-异戊烯腺嘌呤的类似物。发现单氟类似物比N 6-异戊烯腺嘌呤更具活性，并且与更有效的玉米素（另一种天然植物生长激素）相当。二氟类似物甚至比玉米蛋白更有效。

  DOI：

  10.1002/ijch.199900020

文献信息

• METHOD FOR PRODUCING 3,5-BIS(FLUOROALKYL)-PYRAZOL-4-CARBOXYLIC ACID DERIVATIVES AND 3,5-BIS(FLUOROALKYL)-PYRAZOLES
  申请人：BAYER CROPSCIENCE AG

  公开号：US20150011779A1

  公开（公告）日：2015-01-08

  The present invention relates to novel 3,5-bis(fluoroalkyl)pyrazole-4-carboxylic acid derivatives and to a process for preparing 3,5-bis(fluoroalkyl)pyrazole-4-carboxylic acid derivatives and 3,5-bis(fluoroalkyl)pyrazoles.

  本发明涉及新型3,5-双(氟烷基)吡唑-4-羧酸衍生物以及制备3,5-双(氟烷基)吡唑-4-羧酸衍生物和3,5-双(氟烷基)吡唑的方法。
• Method for producing 3,5-bis(fluoroalkyl)-pyrazol-4-carboxylic acid derivatives and 3,5-bis(fluoroalkyl)-pyrazoles
  申请人：BAYER CROPSCIENCE AG

  公开号：US10035773B2

  公开（公告）日：2018-07-31

  The present invention relates to novel 3,5-bis(fluoroalkyl)pyrazole-4-carboxylic acid derivatives and to a process for preparing 3,5-bis(fluoroalkyl)pyrazole-4-carboxylic acid derivatives and 3,5-bis(fluoroalkyl)pyrazoles.

  本发明涉及新型 3,5-双（氟烷基）吡唑-4-羧酸衍生物，以及制备 3,5-双（氟烷基）吡唑-4-羧酸衍生物和 3,5-双（氟烷基）吡唑的工艺。
• US9309202B2
  申请人：——

  公开号：US9309202B2

  公开（公告）日：2016-04-12
• Dimethylallyltryptophan synthase. An enzyme-catalyzed electrophilic aromatic substitution
  作者：John C. Gebler、Andrew B. Woodside、C. Dale Poulter

  DOI：10.1021/ja00045a004

  日期：1992.9

  Dimethylallyltryptophan (DMAT) synthase catalyzes the alkylation of L-tryptophan at C(4) by dimethylallyl diphosphate (DMAPP) in the first pathway-specific step in the biosynthesis of ergot alkaloids. The mechanism of the reaction was studied with analogs of both substrates. Five 7-substituted derivatives of N-acetyltryptophan (2, Z = OCH3, CH3, F, CF3, and NO2) were synthesized. The L enantiomers of the free amino acids were obtained by selective hydrolysis of the racemate using aminoacylase from Aspergillus. In addition, the E and Z fluoromethyl and difluoromethyl analogs of DMAPP (1, Y = CH3, CH2F, CHF2) were prepared. Rates of the enzyme-catalyzed reactions were measured for the dimethylallyl derivatives with L-tryptophan and for the L-tryptophan derivatives with DMAPP. In addition, the relative reactivities of the methanesulfonate derivatives of the DMAPP analogs were determined for solvolysis in aqueous acetone. A Hammett plot for the tryptophan analogs gave a good linear correlation with rho = -2.0. In addition, a Hammett plot of the logarithms of the relative rates of solvolysis and enzyme-catalyzed alkylation gave a positive linear correlation. These results indicate that the prenyl-transfer reaction catalyzed by DMAT synthase is an electrophilic aromatic substitution and is mechanistically similar to the electrophilic alkylation catalyzed by farnesyl diphosphate synthase.
• Fluorinated Isopentenyladenines: Synthesis and Cytokinin Activity
  作者：Laurence Marival-Hodebar、Marc Tordeux、Claude Wakselman、Marylène Dias、René Mornet、Michel Laloue

  DOI：10.1002/ijch.199900020

  日期：——

  Analogs of N6-isopentenyladenine bearing one or two fluorine atoms at the allylic position were synthesized from simple fluorinated ketones. The monofluoro analog was found to be more active than N6-isopentenyladenine and equivalent to the more potent zeatin, another natural plant growth hormone. The difluoro analog was even more powerful than zeatin.

  由简单的氟化酮合成了在烯丙基位置带有一个或两个氟原子的N 6-异戊烯腺嘌呤的类似物。发现单氟类似物比N 6-异戊烯腺嘌呤更具活性，并且与更有效的玉米素（另一种天然植物生长激素）相当。二氟类似物甚至比玉米蛋白更有效。