(2R)-ethyl 3-(cyclopenten-1'-yl)-2-(trifluoromethyl)-2-hydroxypropanoate

• 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: (2R)-ethyl 3-(cyclopenten-1'-yl)-2-(trifluoromethyl)-2-hydroxypropanoate
• 英文别名: ethyl 3-(cyclopenten-1′-yl)-2-(trifluoromethyl)-2-hydroxypropanoate；(R)-ethyl 2-(cyclopent-1-en-1-ylmethyl)-3,3,3-trifluoro-2-hydroxypropanoate；ethyl (2R)-2-(cyclopenten-1-ylmethyl)-3,3,3-trifluoro-2-hydroxypropanoate
• 化学式: C₁₁H₁₅F₃O₃
• 分子量: 252.234
• InChiKey: MXOBHKBHJAEDJP-SNVBAGLBSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.3
• 重原子数：
  17
• 可旋转键数：
  5
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.73
• 拓扑面积：
  46.5
• 氢给体数：
  1
• 氢受体数：
  6

反应信息

• 作为产物：
  描述：

  亚甲基环戊烷 、 3,3,3-三氟丙酮酸乙酯 在 silver hexafluoroantimonate 、 PdCl₂[(S)-SunPhos] 作用下， 以 乙二醇二甲醚 、 1,2-二氯乙烷 、 甲苯 为溶剂， 反应 12.5h， 以92%的产率得到(2R)-ethyl 3-(cyclopenten-1'-yl)-2-(trifluoromethyl)-2-hydroxypropanoate
  参考文献：
  名称：

  Pd（II）-SunPhos配合物催化三氟丙酮酸的不对称羰基-烯反应

  摘要：

  开发了一种有效的手性Pd（II）/（S）-SunPhos配合物催化的三氟丙酮酸不对称羰基-烯反应。在温和条件下以高收率和优异的ee获得了一系列包含CF 3基团的光学活性均烯丙基醇。特别地，异丁烯和三氟丙酮酸酯的反应得到所需产物（90％收率，98％ee），催化剂在二氯乙烷/甲苯中的负载量低至0.01mol％。

  DOI：

  10.1016/j.tet.2017.10.044

文献信息

• Asymmetric Platinum Group Metal-Catalyzed Carbonyl-Ene Reactions:  Carbon−Carbon Bond Formation versus Isomerization
  作者：Simon Doherty、Julian G. Knight、Catherine H. Smyth、Ross W. Harrington、William Clegg

  DOI：10.1021/jo062023n

  日期：2006.12.1

  comparative study of the carbonyl-ene reaction between a range of 1,1‘-disubstituted or trisubstituted alkenes and ethyl trifluoropyruvate catalyzed by Lewis acid−platinum group metal complexes of the type [M(R)-BINAP}]2+ (M = Pt, Pd, Ni; BINAP is 2,2‘-bis(diphenylphosphino)-1,1‘-binaphthyl) revealed subtle but significant differences in their reactivity. For instance, the palladium-based Lewis acid [Pd(R)-BINAP}]2+

  之间的范围内的羰基-烯反应的比较研究1,1'-二取代或三取代烯烃和乙基三氟丙酮催化由类型的路易斯酸-铂族金属配合物[M （[R）-BINAP}] 2+（ M ＝ Pt，Pd，Ni； BINAP为2，2′-双（二苯基膦基）-1，1′-联萘基）显示出微妙但显着的反应性差异。例如，基于钯的路易斯酸[Pd （R）-BINAP}] 2+催化亚甲基环烷烃之间的烯反应，从而以良好的收率和优异的非对映和对映选择性提供了预期的α-羟基酯。相反，在相同条件下，相应的[M （R）-BINAP}] 2+（M = Pt，Ni）催化亚甲基环烷烃的异构化以及亚甲基环烷烃和1-甲基环烯烃的混合物以相似的速率进行烯反应，从而以高区域选择性，良好的非对映选择性和优异的优异性能提供了一系列的α-羟基酯。对映选择性。此外，[Pt （R）-BINAP}] 2+它还催化烯产物的后反应异构化以及连续的烯反应，得到双羰基烯产物。
• Triaryl-Like MONO-, BIS-, and TRISKITPHOS Phosphines: Synthesis, Solution NMR Studies, and a Comparison in Gold-Catalyzed Carbon–Heteroatom Bond Forming 5-<i>exo</i>-dig and 6-<i>endo</i>-dig Cyclizations
  作者：Simon Doherty、Julian G. Knight、Daniel O. Perry、Nicholas A. B. Ward、Dror M. Bittner、William McFarlane、Corinne Wills、Michael R. Probert

  DOI：10.1021/acs.organomet.6b00146

  日期：2016.5.9

  A homologous series of triaryl-like KITPHOS-type monophosphines containing one, two, or three bulky 12-phenyl-9,10-dihydro-9,10-ethenoanthracene (KITPHOS) units have been developed, and the influence of increasing steric bulk on their efficacy as ligands in gold(I)-catalyzed carbon-heteroatom bond-forming cyclizations has been investigated. Detailed solution NMR studies on Ph-TRISKITPHOS, its oxide, and the corresponding gold(I) chloride adduct identified a conformational exchange process involving a concerted librational motion of the individual anthracene-derived organic substituents about their P-C bonds. The cessation of this motion at reduced temperatures lowers the molecular symmetry such that the two C6H4 rings in each of the KITPHOS units become inequivalent; a lower energy process involving restricted rotation of the biaryl-like phenyl ring has also been identified. Electrophilic gold(I) complexes of these triaryl-like KITPHOS monophosphines catalyze the 5-exo-dig cycloisomerization of propargyl amides to afford the corresponding methylene oxazolines, which were used in a subsequent tandem carbonyl-ene reaction to afford functionalized 2 -substituted oxazolines. A comparative survey revealed that catalyst efficiency for cycloisomerization decreases in the order MONOKITPHOS = BISKITPHOS > PPh3 > TRISKITPHOS. The optimum system also catalyzes the selective 6-endo-dig cyclization of 2-alkynylbenzyl alcohols, 2-alkynylbenzoic acid, and 2-phenylethynyl benzamides; gratifyingly, in several cases the yields obtained are markedly higher and/or reaction times significantly shorter than those previously reported for related gold catalysts. Moreover, these are the first examples of gold(I)-catalyzed 6-endo-dig cycloisomerizations involving 2-phenylethynyl benzamides and, reassuringly, the optimum gold(I)/MONOKITPHOS systems either rivaled or outperformed existing silver or palladium based catalysts. The steric parameters of this homologous series of phosphines have been quantified and compared with selected triarylphosphines using a combination of Solid -G calculations, to determine the percentage of the metal coordination sphere shielded by the phosphine (the G parameter), and Salerno molecular buried volume calculations (SambVca) to determine the percent buried volume (%V-bur); the corresponding Tolman cone angles have also been determined from correlations.
• Asymmetric carbonyl-ene reaction of trifluoropyruvate catalyzed by Pd(II)-SunPhos complex
  作者：Lili Jiang、Bei Hu、Xiaomin Xie、Zhaoguo Zhang

  DOI：10.1016/j.tet.2017.10.044

  日期：2017.12

  An efficient asymmetric carbonyl-ene reaction of trifluoropyruvate catalyzed by chiral Pd(II)/(S)-SunPhos complex was developed. A series of optically active homoallylic alcohols containing a CF3 group were obtained with high yields and excellent ee under mild conditions. Particularly, the reaction of isobutylene and trifluoropyruvate gave the desired product (90% yield, 98% ee) with catalyst loading

  开发了一种有效的手性Pd（II）/（S）-SunPhos配合物催化的三氟丙酮酸不对称羰基-烯反应。在温和条件下以高收率和优异的ee获得了一系列包含CF 3基团的光学活性均烯丙基醇。特别地，异丁烯和三氟丙酮酸酯的反应得到所需产物（90％收率，98％ee），催化剂在二氯乙烷/甲苯中的负载量低至0.01mol％。