(2R,3S)-β^2,3hAla(αMe)-OH | 39801-26-8

• 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: (2R,3S)-β^2,3hAla(αMe)-OH
• 英文别名: 2(R)-methyl-3(S)-aminobutanoic acid；3(S)-amino-2(R)-methylbutanoic acid；(2R,3S)-3-amino-2-methyl-Butanoic acid；(2R,3S)-3-amino-2-methylbutanoic acid
• CAS: 39801-26-8
• 化学式: C₅H₁₁NO₂
• 分子量: 117.148
• InChiKey: RRWPLOJQTOADRZ-DMTCNVIQSA-N

物化性质

• 沸点：
  220.7±23.0 °C(Predicted)
• 密度：
  1.063±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  -2.5
• 重原子数：
  8
• 可旋转键数：
  2
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.8
• 拓扑面积：
  63.3
• 氢给体数：
  2
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  (2R,3S)-β^2,3hAla(αMe)-OH 在 2-氯-1-甲基吡啶碘化物 、 三乙胺 作用下， 以 乙腈 为溶剂， 反应 3.0h， 以60%的产率得到cis-3,4-Dimethyl-azetidinon-(2)
  参考文献：
  名称：

  Enantioselective Synthesis of β-Amino Acid via Asymmetric Bromolactamization

  摘要：

  Asymmetric bromolactamization using (S)-(-)-N-methoxy-2-pyrrolidine carboxamide (4) as a chiral auxiliary was performed successfully. The seven membered bromolactam obtained by asymmetric bromolactamization was converted to enantiomerically pure 3(S)-amino-2(R)-methylbutanoic acid (10).

  DOI：

  10.3987/com-98-s(h)109
• 作为产物：
  描述：

  惕格酸 在 platinum(IV) oxide 、 palladium on activated charcoal 盐酸 、 4-二甲氨基吡啶 、 N-溴代丁二酰亚胺(NBS) 、 氢气 、 1,8-二氮杂双环[5.4.0]十一碳-7-烯 、 N,N'-二环己基碳二亚胺 作用下， 以 甲醇 、 二氯甲烷 、 氯仿 、 苯 为溶剂， 反应 82.0h， 生成 (2R,3S)-β^2,3hAla(αMe)-OH
  参考文献：
  名称：

  Enantioselective Synthesis of β-Amino Acid via Asymmetric Bromolactamization

  摘要：

  Asymmetric bromolactamization using (S)-(-)-N-methoxy-2-pyrrolidine carboxamide (4) as a chiral auxiliary was performed successfully. The seven membered bromolactam obtained by asymmetric bromolactamization was converted to enantiomerically pure 3(S)-amino-2(R)-methylbutanoic acid (10).

  DOI：

  10.3987/com-98-s(h)109

文献信息

• Structure and Conformation ofβ-Oligopeptide Derivatives with Simple Proteinogenic Side Chains: Circular Dichroism and Molecular Dynamics Investigations
  作者：Dieter Seebach、Jürg V. Schreiber、Stefan Abele、Xavier Daura、Wilfred F. van Gunsteren

  DOI：10.1002/(sici)1522-2675(20000119)83:1<34::aid-hlca34>3.0.co;2-b

  日期：2000.1.19
• Design Strategies for the Sequence-Based Mimicry of Side-Chain Display in Protein β-Sheets by α/β-Peptides
  作者：George A. Lengyel、W. Seth Horne

  DOI：10.1021/ja306311r

  日期：2012.9.26

  The sophistication of folding patterns and functions displayed by unnatural-backbone oligomers has increased tremendously in recent years. Design strategies for the mimicry of tertiary structures seem within reach; however, a general method for the mimicry of sheet segments in the context of a folded protein is an unmet need preventing realization of this goal. Previous work has shown that 1 -> 1 alpha ->beta-residue substitutions at cross-strand positions in a hairpin-forming alpha-peptide sequence can generate an alpha/beta-peptide analogue that folds in aqueous conditions but with a change in side-chain display relative to the natural sequence; this change would prevent application of single beta-residue substitutions in a larger protein. Here, we evaluate four different substitution strategies based on replacement of alpha alpha dipeptide segments for the ability to retain both sheet folding encoded by a parent alpha-peptide sequence as well as nativelike side-chain display in the vicinity of the beta-residue insertion point. High-resolution structure determination and thermodynamic analysis of folding by multidimensional NMR suggest that three of the four designs examined are applicable to larger proteins.
• Cyclic Depsipeptides, Grassypeptolides D and E and Ibu-epidemethoxylyngbyastatin 3, from a Red Sea <i>Leptolyngbya</i> Cyanobacterium
  作者：Christopher C. Thornburg、Muralidhara Thimmaiah、Lamiaa A. Shaala、Andrew M. Hau、Jay M. Malmo、Jane E. Ishmael、Diaa T. A. Youssef、Kerry L. McPhail

  DOI：10.1021/np200270d

  日期：2011.8.26

  Two new grassypeptolides and a lyngbyastatin analogue, together with the known dolastatin 12, have been isolated from field collections and laboratory cultures of the marine cyanobacterium Leptolyngbya sp. collected from the SS Thistlegorm shipwreck in the Red Sea. The overall stereostructures of grassypeptolides D (1) and E (2) and Ibu-epidemethoxylyngbyastatin 3 (3) were determined by a combination of 1D and 2D NMR experiments, MS analysis, Marfey's methodology, and HPLC-MS. Compounds 1 and 2 contain 2-methyl-3-aminobutyric acid and 2-aminobutyric acid, while biosynthetically distinct 3 contains 3-amino-2-methylhexanoic acid and the beta-keto amino acid 4-amino-2,2-dimethyl-3-oxopentanoic acid (Ibu). Grassypeptolides D (1) and E (2) showed significant cytotoxicity to HeLa (IC50 = 335 and 192 nM, respectively) and mouse neuro-2a blastoma cells (IC50 = 599 and 407 nM, respectively), in contrast to Ibu-epidemethoxylyngbyastatin 3 (neuro-2a cells, IC50 > 10 mu M) and dolastatin 12 (neuro-2a cells, IC50 > 1 mu M).
• Enantioselective synthesis of .beta.-amino acids. 4. 1,2 Asymmetric induction in the alkylation of 1-benzoyl-3,6(S)-dimethylperhydropyrimidin-4-one. Preparation of the like and unlike stereoisomers of 2-methyl- and 2-benzyl-3(S)-aminobutanoic acid
  作者：Eusebio Juaristi、Jaime Escalante

  DOI：10.1021/jo00060a051

  日期：1993.4

  The title perhydropyrimidin-4-one (S)-4 was prepared from (S)-3-aminobutanoic acid via the Schiff base (S)-8. This heterocycle was alkylated (LDA, methyl iodide, or benzyl bromide) to afford the like and unlike diastereomeric products in a 80:20 ratio. Separation and hydrolysis (6 N aqueous HCl) of these 5,6-dialkylperhydropyrimidin-4-ones leads to the free, enantiomerically pure, amino acids 11-14.
• β-Peptidic Secondary Structures Fortified and Enforced by Zn2+ Complexation – On the Way toβ-Peptidic Zinc Fingers?
  作者：Gérald Lelais、Dieter Seebach、Bernhard Jaun、Raveendra I. Mathad、Oliver Flögel、Francesco Rossi、Marino Campo、Arno Wortmann

  DOI：10.1002/hlca.339

  日期：2006.3

  The correlation between beta(2)-, beta(3)-, and beta(2,3)-amino acid-residue configuration and stability of helix and hairpin-turn secondary structures of peptides consisting of homologated proteinogenic amino acids is analyzed (Figs. 1-3). To test the power of Zn2+ ions in fortifying and/or enforcing secondary structures of beta-peptides, a beta-decapeptide, 1, four beta-octapeptides, 2-5, and a P-hexadecapeptide, 10, have been devised and synthesized. The design was such that the peptides would a) fold to a 14-helix (I and 3) or a hairpin turn (2 and 4), or form neither of these two secondary structures (i.e., 5), and b) carry the side chains of cysteine and histidine in positions, which will allow Zn2+ ions to use their extraordinary affinity for RS- and the imidazole N-atoms for stabilizing or destabilizing the intrinsic secondary structures of the peptides. Tlie beta-hexadecapeptide 10 was designed to a) fold to a turn, to which a 14-helical structure is attached through a P-dipeptide spacer, and b) contain two cysteine and two histidine side chains for Zn complexation, in order to possibly mimic a Zn-finger motif While CD spectra (Figs6-8 and 17) and ESI mass spectra (Figs. 9 and 18) are compatible with the expected effects of Zn 21 ions in all cases, it was shown by detailed NMR analyses of three of the peptides, i.e., 2, 3,5, in the absence and presence of ZnCl2, that i) beta-peptide 2 forms a hairpin turn in H2O, even without Zn complexation to the terminal beta(3)hHis and 3 hCys side chains (Fig. 11), ii) beta-peptide 3, which is present as a 14-helix in MeOH, is forced to a hairpin-turn structure by Zn complexation in H2O (Fig. 12), and iii) beta-peptide 5 is poorly ordered in CD3OH (Fig. 13) and in H2O (Fig. 14), with far-remote beta(3)hCys and beta(3)hHis residues, and has a distorted turn structure in the presence of Zn 21 ions in H2O, with proximate terminal Cys and His side chains.