ethyl (Z)-3-(fluoromethyl)-2-butenoate | 2929-33-1

• 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-(fluoromethyl)-2-butenoate
• 英文别名: ethyl (Z)-3-(fluoromethyl)but-2-enoate；ethyl 4-fluoro-3-methylbut-2-enoate；ethyl (Z)-4-fluoro-3-methylbut-2-enoate
• CAS: 2929-33-1
• 化学式: C₇H₁₁FO₂
• 分子量: 146.162
• InChiKey: PALGNMVCQVXMGF-XQRVVYSFSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.7
• 重原子数：
  10
• 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：
  3

反应信息

• 作为反应物：
  描述：

  ethyl (Z)-3-(fluoromethyl)-2-butenoate 在 二异丁基氢化铝 作用下， 以 二氯甲烷 、 环己烷 为溶剂， 反应 1.0h， 生成 (Z)-3-(fluoromethyl)-2-buten-1-ol
  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：

  氟代丙酮 、 (2-ethoxy-2-oxoethyl)trimethylphosphonium bromide 在 1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下， 以 甲苯 为溶剂， 以60%的产率得到
  参考文献：
  名称：

  所述的原点ë / Ž选择性在四取代的烯烃的合成α-Fluorophosphonium叶立德Wittig反应：在α-烷氧基醛的反应中观察到的低立体选择性的一种解释

  摘要：

  通过α-杂取代的酮与α-氟代鎓的Wittig反应，以高收率和高E / Z选择性（高达96/4）合成了一系列四取代的氟代烯烃。对这些反应中控制立体选择性的因素的详细研究表明，立体选择性是稳定添加TS中导致E异构体的CH··F和N··C = O相互作用的结果。该分析为观察到的稳定的酰基化物与α-烷氧基醛的反应的选择性降低提供了理由。

  DOI：

  10.1021/acs.orglett.7b00344

文献信息

• 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。
• Origin of the <i>E</i>/<i>Z</i> Selectivity in the Synthesis of Tetrasubstituted Olefins by Wittig Reaction of α-Fluorophosphonium Ylides: An Explanation for the Low Stereoselectivity Observed in Reactions of α-Alkoxy Aldehydes
  作者：Dominique Depré、Wim A. A. Vermeulen、Yolande Lang、Jean Dubois、Jan Vandevivere、Jeremy Vandermeersch、Longchuan Huang、Raphaël Robiette

  DOI：10.1021/acs.orglett.7b00344

  日期：2017.3.17

  96/4) by Wittig reaction between α-heterosubstituted ketones and α-fluorophosphonium ylides. A detailed study of factors that control stereoselectivity in these reactions shows that stereoselectivity is the result of stabilizing CH···F and N···C═O interactions in the addition TS leading to the E isomer. This analysis provides a rationale for the observed decrease in selectivity for reactions of stabilized

  通过α-杂取代的酮与α-氟代鎓的Wittig反应，以高收率和高E / Z选择性（高达96/4）合成了一系列四取代的氟代烯烃。对这些反应中控制立体选择性的因素的详细研究表明，立体选择性是稳定添加TS中导致E异构体的CH··F和N··C = O相互作用的结果。该分析为观察到的稳定的酰基化物与α-烷氧基醛的反应的选择性降低提供了理由。
• 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.