(E)-methyl 4-(2-fluorophenyl)-2-oxobut-3-enoate | 1239317-44-2

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 肉桂酸及其衍生物
• 英文名称: (E)-methyl 4-(2-fluorophenyl)-2-oxobut-3-enoate
• 英文别名: methyl (E)-4-(2-fluorophenyl)-2-oxobut-3-enoate
• CAS: 1239317-44-2
• 化学式: C₁₁H₉FO₃
• 分子量: 208.189
• InChiKey: VEUPCXWNQKXTFS-VOTSOKGWSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.2
• 重原子数：
  15
• 可旋转键数：
  4
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.09
• 拓扑面积：
  43.4
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  (E)-methyl 4-(2-fluorophenyl)-2-oxobut-3-enoate 在 4-二甲氨基吡啶 作用下， 以 二氯甲烷 为溶剂， 生成 3-tert-butyl 5-methyl 5-((E)-2-fluorostyryl)-4-(2-oxooxazolidine-3-carbonyl)-2-thioxooxazolidine-3,5-dicarboxylate
  参考文献：
  名称：

  手性N，N'-二氧化钇-三氟甲基磺酸盐配合物-α-异硫氰基酰亚胺催化α-酮基酯的不对称醛醇缩合环化反应

  摘要：

  AbstractA highly effective aldol cyclization of α‐isothiocyanato imide to both β,γ‐unsaturated α‐keto esters and aryl‐substituted α‐keto esters has been developed. A chiral N,N′‐dioxide–yttrium triflate complex was used as the catalyst. A series of cyclic thiocarbamates bearing chiral quaternary stereocenters was synthesized in good to high yields, excellent diastereo‐ (up to 25:1 dr) and enantioselectivities (up to 99 % ee). In addition, the reaction could be carried out on a gram‐scale, and other functionalized derivatives are also conveniently transformed. Interestingly, a discrepancy of diastereoselection was observed between the reactions of β,γ‐unsaturated α‐keto esters and aryl‐substituted α‐keto esters. Moreover, a substrate dependency of non‐linear effects was observed in this reaction. On the basis of the experimental results and the absolute configuration of the products, possible catalytic models have been proposed to explain the origin of the asymmetric process.magnified image

  DOI：

  10.1002/adsc.201300593
• 作为产物：
  描述：

  1-(二甲氧基甲基)-2-氟苯 在 三氟化硼乙醚 、 silica gel 作用下， 以 二氯甲烷 、 苯 为溶剂， 反应 27.0h， 生成 (E)-methyl 4-(2-fluorophenyl)-2-oxobut-3-enoate
  参考文献：
  名称：

  Efficient Enantioselective Synthesis of Dihydropyrans Using a Chiral N,N′-Dioxide as Organocatalyst

  摘要：

  The bifunctional organocatalyst C3 N,N'-dioxide has been successfully applied to the asymmetric cascade Michael/hemiacetalization reaction of alpha-substituted cyano ketones and beta,gamma-unsaturated alpha-ketoesters for the synthesis of multifunctionalized chiral dihydropyrans. The corresponding products were obtained in excellent yields (up to 99%) with high to excellent enantioselectivities (up to 99% ee).

  DOI：

  10.1021/ol400894j

文献信息

• Lewis acid catalyzed asymmetric [4+2] cycloaddition of cyclobutenones to synthesize α,β-unsaturated δ-lactones
  作者：Qian Yao、Han Yu、Hang Zhang、Shunxi Dong、Fenzhen Chang、Lili Lin、Xiaohua Liu、Xiaoming Feng

  DOI：10.1039/c8cc01040d

  日期：——

  Here we report an efficient asymmetric [4+2] cycloaddition of β,γ-unsaturated α-ketoesters with cyclobutenones. The corresponding products were obtained in good yields (up to 92%) with excellent enantioselectivities (up to 98% ee) and diastereoselectivities (up to >19/1 dr). Moreover, based on the control experiments and previous reports, a possible catalytic cycle was proposed.

  在这里，我们报告了β，γ-不饱和α-酮酸酯与环丁烯酮的有效不对称[4 + 2]环加成反应。获得了具有良好对映选择性（高达98％ee）和非对映选择性（高达> 19/1 dr）的高收率（最高92％）的相应产物。此外，基于控制实验和先前的报道，提出了可能的催化循环。
• The asymmetric Cu(<scp>ii</scp>)–indolinylmethanol complex catalyzed Diels–Alder reaction of 2-vinylindoles with β,γ-unsaturated α-ketoesters: an efficient route to functionalized tetrahydrocarbazoles
  作者：Banlai Ouyang、Tingting Yu、Renshi Luo、Gui Lu

  DOI：10.1039/c4ob00196f

  日期：——

  An efficient asymmetric Diels–Alder reaction of 2-vinylindoles with β,γ-unsaturated α-ketoesters has been developed for the construction of functionalized tetrahydrocarbazoles. The products were obtained in high yields (up to 96%) with good stereoselectivities (ee up to 95%, dr up to >99 : 1).

  已经开发了一种有效的不对称的2-乙烯基吲哚与β，γ-不饱和α-酮酸酯的Diels-Alder反应，用于官能化四氢咔唑的构建。以高产率（高达96％）和良好的立体选择性（ee高达95％，dr高达＞ 99∶1）获得产物。
• Synthesis of Chiral α,β-Unsaturated γ-Amino Esters via Pd-Catalyzed Asymmetric Allylic Amination
  作者：Chao Xia、Jiefeng Shen、Delong Liu、Wanbin Zhang

  DOI：10.1021/acs.orglett.7b01904

  日期：2017.8.18

  A Pd-catalyzed asymmetric allylic amination of 4-substituted 2-acetoxybut-3-enoates with amines has been developed for the regiospecific synthesis of chiral α,β-unsaturated γ-amino esters. The desired chiral aminated products can be obtained in up to 98% yield, and 99% ee and can be conveniently transformed to chiral γ-amino acid/alcohol derivatives and chiral γ-lactams, which can then be subjected

  已经开发了Pd催化的4-取代的2-乙酰氧基丁-3-烯酸酯与胺的不对称烯丙基胺化，用于手性α，β-不饱和γ-氨基酯的区域特异性合成。可以以高达98％的收率和99％ee的产率获得所需的手性胺化产物，并且可以方便地将其转化为手性γ-氨基酸/醇衍生物和手性γ-内酰胺，然后可以对其进行几种类型的合成手性药物和候选药物。手性γ-氨基酯的优先形成可能归因于烯丙基底物右侧的庞大取代基。这项工作为合成手性α，β-不饱和γ-氨基酯及其衍生物提供了有效的策略。
• Tuning Electronic and Steric Effects: Highly Enantioselective [4+1] Pyrroline Annulation of Sulfur Ylides with α,β-Unsaturated Imines
  作者：Liang-Qiu Lu、Ji-Ji Zhang、Fang Li、Ying Cheng、Jing An、Jia-Rong Chen、Wen-Jing Xiao

  DOI：10.1002/anie.201000755

  日期：2010.6.14

  A change in tune: A novel [4+1] annulation between atropisomeric sulfur ylides 1 and unsaturated imines 2 was developed. The method allows the synthesis of enantioenriched pyrroline products 3 in high yield and with excellent stereocontrol. The origin of stereoinduction was primarily rationalized by a conformational analysis of the ylides.

  音调变化：开发了一种新的[4 + 1]环锭异构硫基亚砜1和不饱和亚胺2之间的环。该方法允许高收率和优异的立体控制合成富含对映体的吡咯啉产物3。立体诱导的起源主要是通过对叶立德进行构象分析来合理化的。
• Asymmetric Organocatalytic Reductive Coupling Reactions between Benzylidene Pyruvates and Aldehydes
  作者：Matthew A. Horwitz、Blane P. Zavesky、Jesus I. Martinez-Alvarado、Jeffrey S. Johnson

  DOI：10.1021/acs.orglett.5b03127

  日期：2016.1.4

  An organocatalytic three-component reductive coupling reaction between dimethyl phosphite, benzylidene pyruvates, and aldehydes is reported. A chiral triaryliminophosphorane catalyst promotes Pudovik addition, which is followed by phospha-Brook rearrangement to transiently generate enolates that are trapped stereoselectively by aldehydes. This reductive coupling provides vicinal polyfunctionalized

  报道了亚磷酸二甲酯，亚苄基丙酮酸酯和醛之间的有机催化三组分还原偶联反应。手性三芳基次膦酸酯催化剂可促进Pudovik加成，然后进行磷-布鲁克重排以瞬时生成被醛选择性立体捕获的烯醇化物。这种还原偶联从容易获得的手性起始原料中提供了邻近的多官能化立体中心，具有出色的非对映选择性，对映选择性和产率。