2,5-二乙氧基吡嗪 | 38629-25-3

• 分子结构分类: 有机化合物 - 有机氧化合物
• 中文名称: 2,5-二乙氧基吡嗪
• 英文名称: 2,5-Diethoxypyrazine
• 英文别名: 2,5-diethoxy-pyrazine；2,5-Diethoxy-pyrazin；2,5-Diethoxypyrazin
• CAS: 38629-25-3
• 化学式: C₈H₁₂N₂O₂
• 分子量: 168.195
• InChiKey: SJDFMJZMQLIMDN-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.7
• 重原子数：
  12
• 可旋转键数：
  4
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  44.2
• 氢给体数：
  0
• 氢受体数：
  4

安全信息

• 海关编码：
  2933990090

反应信息

• 作为反应物：
  描述：

  仲丁基锂 、 2,5-二乙氧基吡嗪 在 四甲基乙二胺 作用下， 以 四氢呋喃 、 环己烷 为溶剂， 反应 5.0h， 以73%的产率得到2-sec-Butyl-3,6-diethoxy-2,5-dihydropyrazine
  参考文献：
  名称：

  Groth, Ulrich; Huhn, Thomas; Porsch, Bettina, Liebigs Annalen der Chemie, 1993, # 7, p. 715 - 720

  摘要：

  DOI：
• 作为产物：
  描述：

  3,6-Diethoxy-2,5-dihydropyridazin 在 N-氯代丁二酰亚胺 、 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile 作用下， 以 四氯化碳 为溶剂， 反应 12.0h， 以91%的产率得到2,5-二乙氧基吡嗪
  参考文献：
  名称：

  Groth, Ulrich; Huhn, Thomas; Porsch, Bettina, Liebigs Annalen der Chemie, 1993, # 7, p. 715 - 720

  摘要：

  DOI：

文献信息

• Conformationally semi-constrained quinoxaline 2,3-diones as neuroprotective agents
  申请人：——

  公开号：US20020065415A1

  公开（公告）日：2002-05-30

  Described are neuroprotective agents of Formula I 1 wherein R is an amino acid, a derivative thereof, or nitrogen heterocyclic ring which is saturated or unsaturated of from 5 to 8 members which may have additional oxygen or sulfur atoms therein and which may be substituted by one or more substituents selected from: alkyl of from 1 to 4 carbon atoms, hydroxyl, alkoxy of from 1 to 4 carbon atoms, —CF 3 , —CN, -amino, —C(O)R 11 ,or —(CH 2 ) n -aryl of from 6 to 12 carbon atoms; R must be attached through a carbon to the quinoxalinyl ring; R 1 is H, alkyl of from 1 to 4 carbon atoms, phosphonoalkyl of from 1 to 4 carbon atoms, phosphoroalkyl of from 1 to 4 carbon atoms, carboxyalkyl of from 1 to 4 carbon atoms, —(CH 2 ) m C(O)R 11 , or hydroxy; R 2 is hydrogen, hydroxy, or amine; R 3 and R 4 are each independently H, alkyl of from 1 to 4 carbon atoms, cycloalkyl of from 5 to 7 carbon atoms, alkenyl of from 2 to 6 carbon atoms, halogen, haloalkyl of from 1 to 6 carbon atoms, nitro, cyano, SO 2 CF 3 , CH 2 SO 2 R 7 , (CH 2 ) m CO 2 R 7 , (CH 2 ) m CONR 7 R 8 , (CH 2 ) m SO 2 NR 8 R 9 , or NHCOR 7 ; R 5 is H, alkyl of from 1 to 4 carbon atoms, alkenyl of from 2 to 6 carbon atoms, cycloalkyl of from 5 to 7 carbon atoms, halogen, haloalkyl of from 1 to 4 carbon atoms, —(CH 2 ) m aryl of from 6 to 10 carbon atoms, nitro, cyano, SO 2 CF 3 , (CH 2 ) m CO 2 R 9 , (CH 2 ) m CONR 9 R 10 , SO 2 NR 9 R 10 , SO 2 R 7 , (CH 2 ) m SO 2 R 7 , NHCOR 9 , —(CH 2 ) m heterocyclic of from 6 to 10 atoms which may contain nitrogen, oxygen, sulfur, and/or —(CH 2 ) n R; R 5 may be joined at R 4 to form a cyclic aromatic or a heterocyclic ring of from 5 to 7 members which may contain nitrogen, oxygen, or sulfur; R 7 , R 8 , R 9 , and R 10 are each independently selected from hydrogen, alkyl of from 1 to 4 carbon atoms, cycloalkyl of from 5 to 7 carbon atoms, haloalkyl of from 1 to 4 carbon atoms, or —(CH 2 ) m R 11 ; R 11 is alkyl or alkoxy of from 1 to 4 carbon atoms, hydroxy, or amino; m is an integer of from 0 to 4; n is an integer of from 0 to 4; (m may or may not be equal to n); or a pharmaceutically acceptable salt thereof.

  本文描述了公式I1的神经保护剂，其中R是氨基酸、其衍生物或氮杂环环，其饱和或不饱和，由5到8个成员组成，其中可能有额外的氧或硫原子，并且可能被一个或多个取代基所取代，所选的取代基包括：碳链为1到4个碳原子的烷基，羟基，碳链为1到4个碳原子的烷氧基，-CF3，-CN，-氨基，-C（O）R11或-（CH2）n-芳基，其由6到12个碳原子组成；R必须通过一个碳原子连接到喹啉基环上；R1是氢，碳链为1到4个碳原子的烷基，碳链为1到4个碳原子的膦酸烷基，碳链为1到4个碳原子的膦酰烷基，碳链为1到4个碳原子的羧基烷基，-（CH2）mC（O）R11或羟基；R2是氢，羟基或胺基；R3和R4各自独立地是氢，碳链为1到4个碳原子的烷基，环烷基为5到7个碳原子，碳链为2到6个碳原子的烯基，卤素，碳链为1到6个碳原子的卤代烷基，硝基，氰基，SO2CF3，CH2SO2R7，（CH2）mCO2R7，（CH2）mCONR7R8，（CH2）mSO2NR8R9或NHCOR7；R5是氢，碳链为1到4个碳原子的烷基，碳链为2到6个碳原子的烯基，环烷基为5到7个碳原子，卤素，碳链为1到4个碳原子的卤代烷基，-（CH2）maryl，其由6到10个碳原子组成，硝基，氰基，SO2CF3，（CH2）mCO2R9，（CH2）mCONR9R10，SO2NR9R10，SO2R7，（CH2）mSO2R7，NHCOR9，-（CH2）mheterocyclic，其由6到10个原子组成，其中可能含有氮、氧、硫和/或-（CH2）nR；R5可以在R4处连接，形成由5到7个成员组成的环芳香族或杂环环，其中可能含有氮、氧或硫；R7、R8、R9和R10各自独立地选择自氢，碳链为1到4个碳原子的烷基，环烷基为5到7个碳原子，碳链为1到4个碳原子的卤代烷基或-（CH2）mR11；R11是碳链为1到4个碳原子的烷基或烷氧基，羟基或氨基；m是0到4的整数；n是0到4的整数；（m可能等于或不等于n）；或其药学上可接受的盐。
• Syntheses of racemic and non-racemic silicon- and germanium-containing α-amino acids of the formula type H2NCH(CH2ElR3)COOH (El=Si, Ge; R=organyl) and incorporation of d-H2NCH(CH2SiMe3)COOH and d-H2NCH(CH2GeMe3)COOH into biologically active decapeptides: a study on C/Si/Ge bioisosterism
  作者：Markus Merget、Kurt Günther、Michael Bernd、Eckhard Günther、Reinhold Tacke

  DOI：10.1016/s0022-328x(01)00783-5

  日期：2001.5

  Two novel efficient methods for the synthesis of racemic silicon- and germanium-containing a-amino acids of the formula type rac-H2NCH(CH2EIR3)COOH (El = Si, Ge; R = organyl), starting from 3,6-diethoxy-2,5-dihydropyrazine, have been developed. Racemic cc-amino acids synthesized: rac-H2NCH(CH2SiMe3)COOH (rac-2), rac-H2NCH(CH2GeMe3)COOH (rac-3), rac-H2NCH(CH2SiMe2Ph)COOH (rac-4), rac-H2NCH(CH2GeMe2Ph)COOH (rac-5), and rac-H2NCH(CH2SiMe2CH=CH2)COOH (rac-6). Preparative liquid-chromatographic resolution of rac-2 and rac-3 [CHIROBIOTIC T (glycopeptide Teicoplanin covalently linked to spherical silica gel) as the stationary phase] yielded the alpha -amino acids (R)-2, (S)-2, (R)-3, and (S)-3. The (R)- and (S)-enantiomers of beta-(trimethylsilyl)alanine [(R)- and (S)-2] and beta-(trimethylgermyl)alanine I(R)- and (S)-3] are sila-analogs and germa-analogs, respectively, of the antipodes of the non-proteinogenic alpha -amino acid beta -tert-butylalanine [(S)- and (R)-H2NCH(CH2CMe3)COOH; (S)- and (R)-1]. Starting from the N-Fmoc-protected C/Si/Ge-analogous (D-configurated) alpha -amino acids (R)-1, (S)-2, and (S)-3, the C/Si/Ge-analogous decapeptides 7-9 [Ac-D-Nal(1)-4-Cl-D-Phe(2)-D-Pal(3)-Ser(4)-N-Me-Tyr(5)-D-Hci(6)- Nle(7)-Arg(8)-Pro(9)-D-Me(3)El-Ala(10)-NH2 (7, El = C; 8, El = Si; 9, El = Ge)] were prepared by sequential solid-phase synthesis. The decapeptides 7-9 were studied in vitro in a functional assay using a recombinant cell line expressing the human GnRH receptor (agonist Triptorelin). Compounds 7-9 behaved as medium-potent GnRH antagonists, the antagonistic potencies of these three C/Si/Ge analogs being very similar. (C) 2001 Elsevier Science B.V. All rights reserved.
• US6340758B1
  申请人：——

  公开号：US6340758B1

  公开（公告）日：2002-01-22
• US6455698B1
  申请人：——

  公开号：US6455698B1

  公开（公告）日：2002-09-24
• Groth, Ulrich; Huhn, Thomas; Porsch, Bettina, Liebigs Annalen der Chemie, 1993, # 7, p. 715 - 720
  作者：Groth, Ulrich、Huhn, Thomas、Porsch, Bettina、Schmeck, Carsten、Schoellkopf, Ulrich

  DOI：——

  日期：——