Bz-Ala-Ser-OMe | 79113-33-0

• 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: Bz-Ala-Ser-OMe
• 英文别名: methyl (2S)-2-[[(2S)-2-benzamidopropanoyl]amino]-3-hydroxypropanoate
• CAS: 79113-33-0
• 化学式: C₁₄H₁₈N₂O₅
• 分子量: 294.307
• InChiKey: HYQBPJQBBJNLID-ONGXEEELSA-N

物化性质

• 熔点：
  134-135 °C
• 沸点：
  610.4±50.0 °C(Predicted)
• 密度：
  1.244±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  0.2
• 重原子数：
  21
• 可旋转键数：
  7
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.36
• 拓扑面积：
  105
• 氢给体数：
  3
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  Bz-Ala-Ser-OMe 在 ruthenium trichloride 、 sodium periodate 作用下， 以 四氯化碳 、 乙腈 为溶剂， 反应 0.5h， 以49%的产率得到Bz-Ala-NH2
  参考文献：
  名称：

  Protein Backbone Modification by Novel C.alpha.-C Side-Chain Scission

  摘要：

  alpha-Ketoamide (-NH-CO-CO-) units in intact peptides are generated from Ser/Thr residues via Ru(VIII)catalyzed C-alpha-C side-chain scission. Facets associated with this novel cu-carbon modification have been probed with 75 peptides chosen to represent every possible peptide environment. The reactions were carried out at room temperature with in situ generated Ru(VIII) in biphasic (CH3CN/CCl4/pH 3 phosphate buffer, 1:1:2 v/v) medium. Whereas Ser/Thr residues placed at the C-terminal end in peptides undergo N-C bond scission leading to des-Ser/Thr peptide amides-thus acting as Gly equivalents in simulating the alpha-amidating action of pituitary enzymes-those located at the N-terminal or nonterminal or even at the C-terminal position (protected as amide) were found to undergo oxidative C-C bond scission (involving C-alpha and C side-chain bond), resulting in the generation of alpha-ketoamide (-NH-CO-CO-) units in the intact peptide backbone. The difference in the products arising from C-alpha-C side-chain scission of Ser/Thr esters and amides is rationalized on the basis of a common mechanism involving either oxaloesters [Pep-NH-CO-COX; X = OMe] or oxalamides [X = NH2 or NH-Pep] arising from the oxidation of initially formed carbinolamide intermediates [Pep-NH-CH(OH)-COX],wherein, while the former are shown to undergo hydrolysis to terminal amides [Pep-NH2], the oxalamides are found to be stable to hydrolysis. Ancillary noteworthy findings are those of peptide bond scission when contiguous Ser-Ser/Thr-Thr residues are present and the oxidative cleavage at C-terminal Tyr/Trp sites generating des amides. The oxidative methodology presented here is mild, simple, and practical and proceeds with chiral retention. The insensitivity of a large number of amino acid residues, such as Gly, Ala, Leu, Asn, Gln, Asp, Glu, Pro, Arg, Phe, Lys, Val, and Aib, and N-protecting groups, such as Boc, Z, and Bz, toward Ru(VIII) under the experimental conditions should make this methodology practical and useful. Sulfur-containing amino acids Cys and Met get oxidized to sulfones in the products.

  DOI：

  10.1021/ja00094a008
• 作为产物：
  描述：

  methyl 3-((S)-2-(benzamido)propanoyloxy)-2-(benzyloxycarbonylamino)propanoate 在 palladium on activated charcoal 、 氢气 作用下， 以 乙酸乙酯 为溶剂， 反应 3.0h， 以98%的产率得到Bz-Ala-Ser-OMe
  参考文献：
  名称：

  实用的芳烃单元，用于氮杂内酯的动态动力学拆分：正交保护的产品和基于连接的偶联过程

  摘要：

  已经开发出用于产生对映选择性氮杂内酯动态动力学拆分以产生正交保护的氨基酸的第一种策略。在C的存在下2 -对称的基于方酰胺的催化剂，苯甲醇与新型的但易于制备的四氯异丙氧基羰基取代的内酯反应，生成具有重要对映体控制意义的，具有重大合成意义的被困邻苯二甲酰亚胺产品。这些材料是被掩盖的氨基酸，它们被证明是正交保护的：邻苯二甲酰亚胺的裂解可以在酯的存在下实现，反之亦然。该过程可用于使受保护的丝氨酸（以化学计量负载）与衍生自天然和非生物氨基酸的外消旋a内酯进行高度立体选择性的连接型偶联。脱保护后，随后的碱基介导的O→N酰基转移发生，形成二肽。

  DOI：

  10.1002/anie.201406857

文献信息

• An exceptionally mild and efficient route to dehydroalanine peptides
  作者：Darshan Ranganathan、Kavita Shah、Narendra Vaish

  DOI：10.1039/c39920001145

  日期：——

  Δ-Ala peptides are formed in good yields on treatment of the corresponding serine precursors with oxalyl chloride and triethylamine in methylene chloride at 0 °C.

  在 0 °C 下，用草酰氯和三乙胺在二氯甲烷中处理相应的丝氨酸前体，可生成产率很高的Δ-Ala 肽。
• RANGANATHAN, DARSHAN;SAINI, SUJATA, J. AMER. CHEM. SOC., 113,(1991) N, C. 1042-1044
  作者：RANGANATHAN, DARSHAN、SAINI, SUJATA

  DOI：——

  日期：——
• A Practical Aryl Unit for Azlactone Dynamic Kinetic Resolution: Orthogonally Protected Products and A Ligation-Inspired Coupling Process
  作者：Sean Tallon、Francesco Manoni、Stephen J. Connon

  DOI：10.1002/anie.201406857

  日期：2015.1.12

  The first strategy for bringing about enantioselective azlactone dynamic kinetic resolution to generate orthogonally protected amino acids has been developed. In the presence of a C2‐symmetric squaramide‐based catalyst, benzyl alcohol reacts with novel yet readily prepared tetrachloroisopropoxycarbonyl‐substituted azlactones to generate trapped phthalimide products of significant synthetic interest

  已经开发出用于产生对映选择性氮杂内酯动态动力学拆分以产生正交保护的氨基酸的第一种策略。在C的存在下2 -对称的基于方酰胺的催化剂，苯甲醇与新型的但易于制备的四氯异丙氧基羰基取代的内酯反应，生成具有重要对映体控制意义的，具有重大合成意义的被困邻苯二甲酰亚胺产品。这些材料是被掩盖的氨基酸，它们被证明是正交保护的：邻苯二甲酰亚胺的裂解可以在酯的存在下实现，反之亦然。该过程可用于使受保护的丝氨酸（以化学计量负载）与衍生自天然和非生物氨基酸的外消旋a内酯进行高度立体选择性的连接型偶联。脱保护后，随后的碱基介导的O→N酰基转移发生，形成二肽。
• Protein Backbone Modification by Novel C.alpha.-C Side-Chain Scission
  作者：Darshan Ranganathan、Narendra K. Vaish、Kavita Shah

  DOI：10.1021/ja00094a008

  日期：1994.7

  alpha-Ketoamide (-NH-CO-CO-) units in intact peptides are generated from Ser/Thr residues via Ru(VIII)catalyzed C-alpha-C side-chain scission. Facets associated with this novel cu-carbon modification have been probed with 75 peptides chosen to represent every possible peptide environment. The reactions were carried out at room temperature with in situ generated Ru(VIII) in biphasic (CH3CN/CCl4/pH 3 phosphate buffer, 1:1:2 v/v) medium. Whereas Ser/Thr residues placed at the C-terminal end in peptides undergo N-C bond scission leading to des-Ser/Thr peptide amides-thus acting as Gly equivalents in simulating the alpha-amidating action of pituitary enzymes-those located at the N-terminal or nonterminal or even at the C-terminal position (protected as amide) were found to undergo oxidative C-C bond scission (involving C-alpha and C side-chain bond), resulting in the generation of alpha-ketoamide (-NH-CO-CO-) units in the intact peptide backbone. The difference in the products arising from C-alpha-C side-chain scission of Ser/Thr esters and amides is rationalized on the basis of a common mechanism involving either oxaloesters [Pep-NH-CO-COX; X = OMe] or oxalamides [X = NH2 or NH-Pep] arising from the oxidation of initially formed carbinolamide intermediates [Pep-NH-CH(OH)-COX],wherein, while the former are shown to undergo hydrolysis to terminal amides [Pep-NH2], the oxalamides are found to be stable to hydrolysis. Ancillary noteworthy findings are those of peptide bond scission when contiguous Ser-Ser/Thr-Thr residues are present and the oxidative cleavage at C-terminal Tyr/Trp sites generating des amides. The oxidative methodology presented here is mild, simple, and practical and proceeds with chiral retention. The insensitivity of a large number of amino acid residues, such as Gly, Ala, Leu, Asn, Gln, Asp, Glu, Pro, Arg, Phe, Lys, Val, and Aib, and N-protecting groups, such as Boc, Z, and Bz, toward Ru(VIII) under the experimental conditions should make this methodology practical and useful. Sulfur-containing amino acids Cys and Met get oxidized to sulfones in the products.