Boc-Gly-Z-ΔAbu(β-Br)-OMe | 1185908-71-7

• 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: Boc-Gly-Z-ΔAbu(β-Br)-OMe
• 英文别名: Boc-Gly-ΔAbu(β-Br)-OMe
• CAS: 1185908-71-7
• 化学式: C₁₂H₁₉BrN₂O₅
• 分子量: 351.197
• InChiKey: UHIWWAFXTPLTFZ-CLFYSBASSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.43
• 重原子数：
  20.0
• 可旋转键数：
  4.0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.58
• 拓扑面积：
  93.73
• 氢给体数：
  2.0
• 氢受体数：
  5.0

反应信息

• 作为反应物：
  描述：

  Boc-Gly-Z-ΔAbu(β-Br)-OMe 在 1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下， 以 乙腈 为溶剂， 反应 0.5h， 以85%的产率得到methyl 2-(N-tert-butyloxycarbonylaminomethyl)-5-methyl-1,3-oxazole-4-carboxylate
  参考文献：
  名称：

  A mild high yielding synthesis of oxazole-4-carboxylate derivatives

  摘要：

  Several 2,5-disubstituted oxazole-4-carboxylates were prepared in high yields from the methyl esters of N-acyl-beta-halodehydroaminobutyric acid derivatives by treatment with a 2% solution of DBU in acetonitrile. The scope of this reaction was investigated and it was found that dehydrodipeptides having a beta-bromodehydroaminobutyric acid residue gave the corresponding oxazoles in good yields. The photophysical properties of some of the oxazoles prepared were studied in four solvents of different polarity. All compounds have reasonable high fluorescence quantum yields and a moderate solvent sensitivity, which makes them good candidates to be used as fluorescent probes. One of the fluorescent oxazoles prepared was inserted after cleavage of the methyl ester into two model peptides using a conventional solution phase strategy. The photophysical properties of the labelled peptides were studied in ethanol and water and compared with those of the oxazole. The results obtained showed that the oxazole maintains a good fluorescence level and the same solvent sensitivity when linked to a peptide chain. (C) 2010 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2010.09.014
• 作为产物：
  描述：

  methyl (Z)-2-(Boc-glycylamino)-2-butenoate 在 N-溴代丁二酰亚胺(NBS) 、 三乙胺 作用下， 以 二氯甲烷 为溶剂， 反应 17.0h， 生成 Boc-Gly-ΔAbu(β-Br)-OMe 、 Boc-Gly-Z-ΔAbu(β-Br)-OMe
  参考文献：
  名称：

  Dehydroamino Acids and Dehydrodipeptides Towards N-Bromosuccinimide: Synthesis of β-Bromo- and β,β-Dibromodehydroamino Acid Derivatives and of Substituted 4-Imidazolidinones

  摘要：

  我们开发了对我们先前报道的用于合成 N，N-二酰基脱氢氨基酸衍生物的高产方法的改进，以制备 N-单保护脱氢氨基酸和脱氢二肽。因此，通过用1当量处理相应的L-丝氨酸、L-苏氨酸和D,L-3-苯基丝氨酸（苏型型）衍生物制备了几种脱氢丙氨酸、脱氢氨基丁酸和脱氢苯丙氨酸衍生物。二叔丁基二碳酸酯和4-(二甲氨基)吡啶。反应进行，最初形成 O-叔丁基碳酸酯，通过用 N,N,N',N'-四甲基胍处理，进行 β 消除，得到相应的脱氢氨基酸衍生物。这种两步法可以作为一锅法进行，并且是立体选择性的，仅给出 Z 异构体。N-单保护的脱氢氨基酸用 N-溴代琥珀酰亚胺处理，然后用三乙胺处理，得到几种 β,β-二溴脱氢丙氨酸或 β-溴-、β-烷基-或 β-芳基脱氢丙氨酸。后者作为 E 和 Z 异构体的混合物获得。使用脱氢苯丙氨酸和使用 4-甲苯磺酰基作为 N-保护基团时，观察到对 Z 异构体形成的立体选择性增加。在脱氢二肽的情况下，当

  DOI：

  10.1002/ejoc.200700669

文献信息

• Synthesis of new β-amidodehydroaminobutyric acid derivatives and of new tyrosine derivatives using copper catalyzed C–N and C–O coupling reactions
  作者：G. Pereira、H. Vilaça、P. M. T. Ferreira

  DOI：10.1007/s00726-012-1337-4

  日期：2013.2

  Several beta-amidodehydroaminobutyric acid derivatives were prepared from N,C-diprotected beta-bromodehydroaminobutyric acids and amides by a copper catalyzed C-N coupling reaction. The best reaction conditions include the use of a catalytic amount of CuI, N,N'-dimethylethylenediamine as ligand and K2CO3 as base in toluene at 110 A degrees C. The stereochemistry of the products was determined using NOE difference experiments and the results obtained are in agreement with an E-stereochemistry. Thus, the stereochemistry is maintained in the case of the E-isomers of beta-bromodehydroaminobutyric acid derivatives, but when the Z-isomers were used as substrates the reaction proceeds with inversion of configuration. The use of beta-bromodehydrodipeptides as substrates was also tested. It was found that the reaction outcome depend on the stereochemistry of the beta-bromodehydrodipeptide and on the nature of the first amino acid residue. The products isolated were the beta-amidodehydrodipeptide derivatives and/or the corresponding dihydropyrazines. The same catalytic system (CuI/N,N'-dimethylethylene diamine) was used in the C-O coupling reactions between a tyrosine derivative and aryl bromides. The new O-aryltyrosine derivatives were isolated in moderate to good yields. The photophysical properties of two of these compounds were studied in four solvents of different polarity. The results show that these compounds after deprotection can be used as fluorescence markers.