(S)-methyl 2-(tert-butoxycarbonylamino)-3-(2-fluorophenyl)propanoate

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: (S)-methyl 2-(tert-butoxycarbonylamino)-3-(2-fluorophenyl)propanoate
• 英文别名: methyl (2S)-3-(2-fluorophenyl)-2-[(2-methylpropan-2-yl)oxycarbonylamino]propanoate
• 化学式: C₁₅H₂₀FNO₄
• 分子量: 297.327
• InChiKey: UNDAJIRHCOOSOP-LBPRGKRZSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.9
• 重原子数：
  21
• 可旋转键数：
  7
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.47
• 拓扑面积：
  64.6
• 氢给体数：
  1
• 氢受体数：
  5

反应信息

• 作为产物：
  描述：

  2-氟碘苯 、 (R)-N-叔丁氧羰基-3-碘代丙氨酸甲酯 在 三甲基氯硅烷 、 tris(dibenzylideneacetone)dipalladium (0) 、 1,2-二溴乙烷 、 三(邻甲基苯基)磷 、 锌 作用下， 生成 (S)-methyl 2-(tert-butoxycarbonylamino)-3-(2-fluorophenyl)propanoate
  参考文献：
  名称：

  Concise Synthesis of Enantiomerically Pure Phenylalanine, Homophenylalanine, and Bishomophenylalanine Derivatives Using Organozinc Chemistry:  NMR Studies of Amino Acid-Derived Organozinc Reagents

  摘要：

  Protected phenylalanines 23 (seven examples), homophenylalanines 7 (eight examples), and bishomophenylalanines 8 (seven examples) have been prepared by palladium-catalyzed coupling of the amino acid-derived organozinc reagents 13, 5, and 6, respectively, with aryl iodides. While the reactions of the zinc reagent 13 may be conducted in both THF and DMF as solvent, the results obtained in DMF are generally superior. In the case of the reagents 5 and 6 the results are far superior in DMF. NMR investigations on the structure of the zinc reagents 13 in THF suggest that there is strong intramolecular coordination of the urethane carbonyl group, whereas in DMF this interaction is completely suppressed.

  DOI：

  10.1021/jo981133u

文献信息

• Evidence for the Role of Tetramethylethylenediamine in Aqueous Negishi Cross-Coupling: Synthesis of Nonproteinogenic Phenylalanine Derivatives on Water
  作者：Andrew J. Ross、Frank Dreiocker、Mathias Schäfer、Jos Oomens、Anthony J. H. M. Meijer、Barry T. Pickup、Richard F. W. Jackson

  DOI：10.1021/jo102334c

  日期：2011.3.18

  ne (TMEDA) cluster cation 3 has been determined in the gas phase by a combination of tandem mass spectrometry, infrared multiphoton dissociation (IRMPD) spectroscopy, and DFT calculations. Both sets of experimental results establish the existence of a strongly stabilizing interaction of TMEDA with the zinc cation. High-level DFT calculations on the alkylzinc−TMEDA cluster cation 3 allowed the identification

  已通过串联质谱，红外多光子离解（IRMPD）光谱和DFT计算相结合，在气相中确定了烷基锌-四甲基乙基-二烯胺（TMEDA）簇阳离子3的结构。两组实验结果都证实了TMEDA与锌阳离子之间存在强烈稳定的相互作用。在烷基锌-TMEDA簇阳离子3上的高级DFT计算允许鉴定两个低能构象体，每个构象都具有一个带有双齿TMEDA配体的四配位锌原子，以及从Boc基团的羰基到锌的内部配位。实验IRMPD光谱是通过理论上确定的两个构象异构体的IR光谱的适当加权组合来再现的。使用水溶剂的PCM模型对配位TMEDA的烷基卤化锌2的结构进行DFT计算，表明TMEDA可以在水性条件下促进有机碘化锌中锌碘键的电离，从而为TMEDA在稳定化中的作用提供了可靠的解释碳锌键。丝氨酸碘化物的反应1在PdCl 2（Amphos）2（5 mol％）和TMEDA的存在下，纳米锌促进了芳基碘化物“在水上”的形成，从而以合理的收率形成了
• Much Improved Conditions for the Negishi Cross-Coupling of Iodoalanine Derived Zinc Reagents with Aryl Halides
  作者：Andrew J. Ross、Hannah L. Lang、Richard F. W. Jackson

  DOI：10.1021/jo902238n

  日期：2010.1.1

  A combination of Pd-2(dba)(3) and SPhos (1:2 molar ratio) is an excellent precatalyst for the Negishi cross-coupling of the serine-derived organozinc reagent 2 with aryl halides, including previously difficult ortho-substituted examples. In the case of meta- and para-substituted aryl halides, Pd-loadings of 0.5 mol % give satisfactory results. Use of 2-iodoaniline as substrate gives the lactam 12 in good yield.