ethyl N-(diphenylmethylene)-L-alaninate

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: ethyl N-(diphenylmethylene)-L-alaninate
• 英文别名: ethyl N^α-(diphenylmethylene)-L-alaninate；ethyl 2-((diphenylmethylene)amino)propanoate；(S)-ethyl N-(diphenylmethylene)alaninate；ethyl Nalpha diphenylmethylene-L-alaninate；ethyl (2S)-2-(benzhydrylideneamino)propanoate
• 化学式: C₁₈H₁₉NO₂
• 分子量: 281.354
• InChiKey: HQJUZZSNMDRJNP-AWEZNQCLSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.2
• 重原子数：
  21
• 可旋转键数：
  6
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.22
• 拓扑面积：
  38.7
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  ethyl N-(diphenylmethylene)-L-alaninate 在 盐酸 、 18-冠醚-6 、 potassium hydride 作用下， 反应 26.5h， 生成 乙基2-甲基-5-次氮基-D-去甲缬氨酸酯
  参考文献：
  名称：

  Structure-Activity Study of Tripeptide Thrombin Inhibitors Using .alpha.-Alkyl Amino Acids and Other Conformationally Constrained Amino Acid Substitutions

  摘要：

  In our continuing effort to design novel thrombin inhibitors, a series of conformationally constrained amino acids (e.g. alpha-alkyl, N-alkyl cyclic, etc.) were utilized in a systematic structure-activity study of the P3, P2, and P1 positions of tripeptide arginal thrombin inhibitors. Early examples of this effort include: D-MePhe-Pro-Arg-H (15), Boc-D-Phg-Pro-Arg-H (18), D-1-Tiq-Pro-Arg-H (23, D-1-Tiq D-1,2,3,4-tetrahydroisoquinolin-1-ylcarbonyl), and Boc-D-Phe-Pro-Arg-H (25).(10a,20) The current work clarifies the contribution of each residue of the tripeptide arginals toward the potent and selective inhibition of thrombin relative to that of t-PA and plasmin. The alpha-methylarginal modification in the P1 residue resulted in analogs 30 (D-MePhe at P3) and 32 (D-1-Tiq at P3) which had lower potency toward thrombin while exhibiting improved selectivity. Analogs modified at the P2 site were found to be very sensitive to the conformational changes induced by variations in side chain ring size with the flexible pipecolinic acid 31 being 2 orders of magnitude less potent at thrombin inhibition than the conformationally constrained azetidine analog 20. Examination of the P3 binding region indicated that alpha-alkylphenylglycine residues resulted in a tendency to exhibit substantial improvements in selectivity over the nonalkylated residues. Combinations of optimal P3 and P2 changes led to compounds TFA-D-Phg(alpha Et)-Azt-Arg-H (16), TFA-D-Phg(alpha Me)-Azt-Arg-H (17), Ac-D-Phg(alpha Me)-Azt-Arg-H (21), TFA-D-Phg(alpha Me)-Pro-Arg-H (27), 30, and 32, which are clearly more selective for thrombin versus plasmin than the nonconformationally constrained compounds.

  DOI：

  10.1021/jm00022a009
• 作为产物：
  描述：

  二苯甲酮亚胺 、 L-丙氨酸乙酯盐酸盐 以 二氯甲烷 为溶剂， 以85%的产率得到ethyl N-(diphenylmethylene)-L-alaninate
  参考文献：
  名称：

  Aluminoxy acetals from .alpha.-amino esters: chirality transfer via sequential addition of hydride and C-nucleophiles. 2-Amino alcohols and sphingosines

  摘要：

  The reaction of alpha-imino esters (O'Donnell's Schiff bases) with aluminum hydrides to produce acetal-like intermediates and subsequent reaction with carbon nucleophiles has been studied. Treatment of optically pure imine-protected amino esters with iBu2AlH or iBuAlH.Bu3Al, followed by RMgX or RLi provided threo-2-amino alcohols in high yield (73-85%) and excellent ''syn'' stereoselectivity (8:1 to >20.1, threo or like product preferred). Use of nonpolar solvents (CH2Cl2-hexane) provided the highest stereoselectivities. Use of the less-reactive iBu2AlH.iBu3Al complex lowered the amount of undesired primary alcohol products observed. Thermally labile aluminoxy acetal intermediates were observed by H-1 NMR and were trapped with N-(trimethylsilyl)imidazole to produce relatively stable monosilyl acetals (mixed acetals). Alanine-derived Schiff bases 2a-e showed a correlation between the steric bulk of the ester and threo selectivity The presence of THF reduced this correlation, suggesting the C-nucleophile addition involves a Lewis acid-assisted S(N)2-like displacement of the aluminoxy acetal or displacement of a tight-ion pair. In addition to the synthesis of optically pure arylethanolamines 6a-d from representative amino acids, threo-sphingosines 8a-d were synthesized from L-serine-derived Schiff base 4b, and 1-deoxy-threo-sphingosines 9a-d were synthesized from L-alanine in a similar fashion. Experimental details are provided.

  DOI：

  10.1021/jo00046a032

文献信息

• A convenient method for the enantiomeric separation of α-amino acid esters as benzophenone imine Schiff base derivatives
  作者：Hu Huang、Wen Jun Xu、Jing-Yu Jin、Joon Hee Hong、Hyun-Jae Shin、Wonjae Lee

  DOI：10.1007/s12272-012-0609-6

  日期：2012.6

  the separation of α-amino acid esters as benzophenone Schiff base derivatives on coated chiral stationary phases (CSPs) (Chiralcel OD-H, Chiralcel OD, Chiralpak AD-H, Chiralpak AD, and Chiralpak AS) or covalently immobilized CSPs (Chiralpak IA, Chiralpak IB, and Chiralpak IC) derived from polysaccharide derivatives is described. Benzophenone imine derivatives of α-amino acid esters were readily prepared

  一种方便的液相色谱方法，用于在涂层手性固定相 (CSP)（Chiralcel OD-H、Chiralcel OD、Chiralpak AD-H、Chiralpak AD 和 Chiralpak AS）上或共价分离作为二苯甲酮席夫碱衍生物的 α-氨基酸酯描述了源自多糖衍生物的固定化 CSP（Chiralpak IA、Chiralpak IB 和 Chiralpak IC）。通过在 2-丙醇中搅拌二苯甲酮亚胺和 α-氨基酸酯的盐酸盐，很容易制备 α-氨基酸酯的二苯甲酮亚胺衍生物。色谱分离以1.0 mL/min的流速和254 nm的检测波长进行；0.5% 2-丙醇/己烷 (v/v) 用于 CSP。总的来说，Chiralpak IC 的分辨率优于其他 CSP。此外，
• Synthesis of α-amino acids using transition metal catalysis - alkylation of schiff bases derived from α-amimo acid esters (regio, stereo - selectivity)
  作者：J.-P. Genet、S. Juge、S. Achi、S. Mallart、J. Ruiz Montes、G. Levif

  DOI：10.1016/s0040-4020(01)86035-x

  日期：1988.1

  the synthesis of γ,δ-unsaturated α-amino acid esters is described. Schiff bases derived from glycine and alanine esters were alkylated in the presence of palladium or molybdenum catalysts under neutral or basic conditions using allylic carbonates, esters or halides, (20–95% yield). These less stabilized nucleophiles reacted with the η3 allyl species on the side opposite to the palladium and they can

  描述了合成γ，δ-不饱和α-氨基酸酯的一般方法。衍生自甘氨酸和丙氨酸酯的席夫碱在钯或钼催化剂的存在下，在中性或碱性条件下，使用烯丙基碳酸盐，酯或卤化物进行烷基化（收率20-95％）。这些不太稳定的亲核试剂与反应η 3烯丙基物种上相反的一侧的钯和它们可以被归类为软亲核体。用各种不对称亲电试剂研究了区域选择性。水解后，获得了几种具有生物学意义的功能化α-氨基酸（酶抑制剂）。使用Pd（OAc）2的二苯甲酮亚胺甘氨酸甲酯的不对称钯烯丙基烷基化+（+）DIOP的ee最高达到68％；用于合成α-氨基酸的这种新的有用的手性亲核试剂的对映体选择性钯促进的烷基化是已知的最高ee之一。
• Palladium catalysed asymmetric alkylation of benzophenone Schiff base glycine esters in ionic liquids
  作者：DAE HYUN KIM、JIN KYU IM、DAE WON KIM、MINSERK CHEONG、HOON SIK KIM、DEB KUMAR MUKHERJEE

  DOI：10.1007/s12039-011-0093-4

  日期：2011.7

  substitution of various benzophenone Schiff base substrates under biphasic conditions proceeded using optically active Palladium(II) complexes. The corresponding products were obtained in high yields but with moderate enantiomeric excess (ee). Addition of specific ionic liquids to the reaction medium enhanced reactivity and selectivity for phase transfer catalytic (PTC) glycine alkylation. It has been found

  使用光学活性的钯（II）配合物，在双相条件下对各种二苯甲酮席夫碱基质进行不对称烷基取代。以高收率获得了相应的产物，但是具有中等的对映体过量（ee）。向反应介质中添加特定的离子液体可增强相转移催化（PTC）甘氨酸烷基化的反应性和选择性。已经发现，存在离子液体的阴离子影响，其改变了烯醇酸根离子周围的空间环境。已经完成了使用钯配合物和离子液体进行对映选择性相转移催化的计算机辅助分子设计。 不对称钯催化剂和前手性离子溶剂的组合在温和条件下促进甘氨酸烷基化。
• Pharmaceutically active fluoromethyltyrosine compounds
  申请人：MERRELL DOW PHARMACEUTICALS INC.

  公开号：EP0451422A1

  公开（公告）日：1991-10-16

  This invention relates to novel monofluoromethyl- and difluoromethyltyrosine compounds which are active as tyrosine hydroxylase inhibitors and are therefore useful in the treatment of conditions caused by high levels of catecholamines such as hypertension, schizophrenia, and pheochromocytoma.

  这项发明涉及新颖的单氟甲基和二氟甲基酪氨酸化合物，这些化合物作为酪氨酸羟化酶抑制剂具有活性，因此在治疗由高儿茶酚胺水平引起的疾病，如高血压、精神分裂症和嗜铬细胞瘤方面具有用途。
• Antithrombotic agents
  申请人：Eli Lilly and Company

  公开号：US05439888A1

  公开（公告）日：1995-08-08

  This invention relates to L-Arginine aldehyde derivatives, pharmaceutical formulations containing those compound and methods of their use as thrombin inhibitors.

  本发明涉及L-精氨酸醛衍生物，含有这些化合物的制药配方以及它们作为凝血酶抑制剂的使用方法。