(2-Bromo-5,6-dichlorobenzimidazol-1-yl)-trimethylsilane | 1028278-16-1

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 苯并咪唑类
• 英文名称: (2-Bromo-5,6-dichlorobenzimidazol-1-yl)-trimethylsilane
• CAS: 1028278-16-1
• 化学式: C₁₀H₁₁BrCl₂N₂Si
• 分子量: 338.106
• InChiKey: XEVQBHMPTSGTLH-UHFFFAOYSA-N

物化性质

• 沸点：
  374.1±45.0 °C(Predicted)
• 密度：
  1.53±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  4.79
• 重原子数：
  16
• 可旋转键数：
  1
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.3
• 拓扑面积：
  17.8
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  (2-Bromo-5,6-dichlorobenzimidazol-1-yl)-trimethylsilane 在 三氟甲磺酸三甲基硅酯 、 氨 作用下， 以 乙腈 为溶剂， 反应 17.0h， 生成 2-bromo-5,6-dichloro-1-β-D-ribofuranosylbenzimidazole
  参考文献：
  名称：

  Design, Synthesis, and Antiviral Activity of Certain 2,5,6-Trihalo-1-(.beta.-D-ribofuranosyl)benzimidazoles

  摘要：

  A new series of 2-substituted 5,6-dichlorobenzimidazole ribonucleosides has been synthesized and tested for activity against two human herpes viruses and for cytotoxicity. 2,5,6-Trichloro-1-(beta-D-ribofuranosyl)benzimidazole (TCRB) was prepared by ribosylation of the heterocycle 2,5,6-trichlorobenzimidazole followed by a removal of the protecting groups. The 2-bromo derivative (BDCRB) was made in a similar fashion from 2-bromo-5,6-dichlorobenzimidazole. In contrast, the 2-iodo derivative presented a more difficult problem since the appropriate heterocycle was unavailable. This prompted us to prepare the 2-amino derivative followed by nonaqueous diazotization and removal of the blocking groups. Biological evaluation revealed marked differences in the activities of these compounds and the closely related known compound 5,6-dichloro-1-(beta-D-ribofuranosyl)benzimidazole (DRB). DRB was weakly active against both human cytomegalovirus (HCMV) and herpes simplex virus type 1 (HSV-1), (IC50's = 42 and 30 mu M, respectively) but-was cytotoxic to uninfected human foreskin fibroblasts and KB cells in the same dose range. Similar results were obtained with the heterocycle 2,5,6-trichlorobenzimidazole. In marked contrast, the ribonucleoside of 2,5,6-trichlorobenzimidazole (TCRB) was active against HCMV (IC50 = 2.9 mu M, plaque assay; IC50 = 1.4 mu M, yield assay) but only weakly active against HSV-1 (IC50 = 102 mu M, plaque assay). Little to no cytotoxicity was observed in HFF and KB cells at concentrations up to 100 mu M. By changing the substituent at the 2-position from chlorine to bromine (BDCRB), a 4-fold increase in activity against HCMV was observed without any significant increase in cytotoxicity. In contrast, the 2-I and 2-NH2 derivatives were only weakly active against HCMV and HSV-1 with activity not well-separated from cytotoxicity. These data establish that for maximum activity against HCMV with separation from cytotoxicity, ribose is preferred at the 1-position and that Cl or Br is apparently preferred at the 2-position. The activity and selectivity of both TCRB and BDCRB were better than that observed with either ganciclovir or foscarnet.

  DOI：

  10.1021/jm00020a025
• 作为产物：
  描述：

  4,5-二氯邻苯二胺 在 氢溴酸 、 copper(I) bromide 、 sodium nitrite 作用下， 以 甲醇 、 水 、 乙腈 为溶剂， 反应 2.17h， 生成 (2-Bromo-5,6-dichlorobenzimidazol-1-yl)-trimethylsilane
  参考文献：
  名称：

  Design, Synthesis, and Antiviral Activity of Certain 2,5,6-Trihalo-1-(.beta.-D-ribofuranosyl)benzimidazoles

  摘要：

  A new series of 2-substituted 5,6-dichlorobenzimidazole ribonucleosides has been synthesized and tested for activity against two human herpes viruses and for cytotoxicity. 2,5,6-Trichloro-1-(beta-D-ribofuranosyl)benzimidazole (TCRB) was prepared by ribosylation of the heterocycle 2,5,6-trichlorobenzimidazole followed by a removal of the protecting groups. The 2-bromo derivative (BDCRB) was made in a similar fashion from 2-bromo-5,6-dichlorobenzimidazole. In contrast, the 2-iodo derivative presented a more difficult problem since the appropriate heterocycle was unavailable. This prompted us to prepare the 2-amino derivative followed by nonaqueous diazotization and removal of the blocking groups. Biological evaluation revealed marked differences in the activities of these compounds and the closely related known compound 5,6-dichloro-1-(beta-D-ribofuranosyl)benzimidazole (DRB). DRB was weakly active against both human cytomegalovirus (HCMV) and herpes simplex virus type 1 (HSV-1), (IC50's = 42 and 30 mu M, respectively) but-was cytotoxic to uninfected human foreskin fibroblasts and KB cells in the same dose range. Similar results were obtained with the heterocycle 2,5,6-trichlorobenzimidazole. In marked contrast, the ribonucleoside of 2,5,6-trichlorobenzimidazole (TCRB) was active against HCMV (IC50 = 2.9 mu M, plaque assay; IC50 = 1.4 mu M, yield assay) but only weakly active against HSV-1 (IC50 = 102 mu M, plaque assay). Little to no cytotoxicity was observed in HFF and KB cells at concentrations up to 100 mu M. By changing the substituent at the 2-position from chlorine to bromine (BDCRB), a 4-fold increase in activity against HCMV was observed without any significant increase in cytotoxicity. In contrast, the 2-I and 2-NH2 derivatives were only weakly active against HCMV and HSV-1 with activity not well-separated from cytotoxicity. These data establish that for maximum activity against HCMV with separation from cytotoxicity, ribose is preferred at the 1-position and that Cl or Br is apparently preferred at the 2-position. The activity and selectivity of both TCRB and BDCRB were better than that observed with either ganciclovir or foscarnet.

  DOI：

  10.1021/jm00020a025

文献信息

• Synthesis and Evaluation of a Series of 2′-Deoxy Analogues of The Antiviral Agent 5,6-Dichloro-2-Isopropylamino-1-(β-L-Ribofuranosyl)-1H-Benzimidazole (1263W94)
  作者：Joseph H. Chan、Stanley D. Chamberlain、Karen K. Biron、Michelle G. Davis、Robert J. Harvey、Dean W. Selleseth、Ronna E. Dornsife、Ernest H. Dark、Lloyd W. Frick、Leroy B. Townsend、John C. Drach、George W. Koszalka

  DOI：10.1080/15257770008032999

  日期：2000.1

  and branched alkylamino groups were needed for potent activity against HCMV. Three analogues 3a, 3b and 3d were as potent as 1263W94. Further evaluation of two analogues, 3a and 3b, suggested that these 2'-deoxy analogues may act via a novel mechanism of action similar to that of 1263W94. These 2'-deoxy analogues generally lacked cytotoxicity in vitro. Pharmacokinetic parameters in mice and protein

  合成了抗病毒剂5,6-二氯-2-异丙基氨基-1-（β-L-核呋喃糖基）-1H-苯并咪唑（1263W94）的一系列2'-脱氧类似物，并评估了其对人巨细胞病毒（HCMV）的活性并具有细胞毒性。苯并咪唑部分中的2-取代基对应于1263W94系列中使用的那些。通常，如在1263W94系列中发现的那样，环状和支链烷基氨基基团需要有效的抗HCMV活性。三个类似物3a，3b和3d与1263W94一样有效。对两个类似物3a和3b的进一步评估表明，这些2'-脱氧类似物可以通过类似于1263W94的新颖作用机制起作用。这些2'-脱氧类似物通常在体外缺乏细胞毒性。小鼠的药代动力学参数和3a的蛋白质结合特性与1263W94非常相似。但是，3a的口服生物利用度仅为1263W94观察到的一半。
• Design, Synthesis and Antiviral Activity of α-L-Arabinofuranosyl Derivatives of 2-Substituted-5,6-dichlorobenzimidazoles
  作者：Jean-Luc Girardet、John C. Drach、Stanley D. Chamberlain、George W. KosLzalka、Leroy B. Townsend

  DOI：10.1080/07328319808004326

  日期：1998.12

  A number of 2-substituted-5,6-dichloro-1-(alpha-L-arabinofuranosyl)benzimidazoles have been prepared by condensation of 2-bromo-5,6-dichlorobenzimidazole or 2,5,6-trichlorobenzimidazole with tetra-O-acetyl-L-arabinofuranose. 2-Alkylamino derivatives were prepared by a substitution of the 2-chloro group with the appropriate amines. All target compounds were evaluated for activity against HCMV and HSV-1. The 2-chloro and 2-bromo derivatives showed moderate activity against HCMV at non-cytotoxic concentrations.
• Synthesis and Antiviral Evaluation of Halogenated β-<scp>d</scp>- and -<scp>l</scp>-Erythrofuranosylbenzimidazoles
  作者：Kristjan S. Gudmundsson、Jeffrey Tidwell、Nicole Lippa、George W. Koszalka、Nanine van Draanen、Roger G. Ptak、John C. Drach、Leroy B. Townsend

  DOI：10.1021/jm990195p

  日期：2000.6.1

  A series of 2-substituted benzimidazole D- and L-erythrofuranosyl nucleosides were synthesized and tested for activity against herpesviruses and for cytotoxicity. The D-nucleosides 2,5,6-trichloro-1-(beta-D-erythrofuranosyl)benzimidazole (8a) and 2-bromo-5,6-dichloro-1-(beta-D-erythrofuranosyl)benzimidazole (8b) were prepared by coupling 1,2,3,-tri-O-acetyl-beta-D-erythrofuranose (D-6) with the appropriate benzimidazole, followed by removal of the acetyl protecting groups. The 2-isopropylamino (9), 2-cyclopropylamino (10), and 2-mercaptobenzyl (11) derivatives were synthesized by nucleophilic displacements of the C-2 chlorine in the benzimidazole moiety of 8a. The D-nucleoside 4-bromo-5,6-dichloro-2-isopropylamino-1-(beta-D-erythrofuranosyl)benzimidazole (17) was prepared by coupling D-6 with the appropriate benzimidazole. The L-erythrofuranosyl derivatives, 5,6-dichloro-2-isopropylamino-1-(beta-L-erythrofuranosyl)benzimidazole (21a), its 2-cyclopropylamine analogue (21b), and the 2-isopropylamino analogue (4c). In comparison, 8a was 15-fold more active against HCMV than 4a, and 8b was 4-fold more active against HCMV than 4b. The 5,6-dichloro-2-isopropylamino-1-(beta-L-erythrofuranosyl)benzimidazole (21a) was less active than 4c, which is now in clinical trials for HCMV infection. Both 8a,b had comparable HCMV activity to 4c. Mode of action studies with the D-erythrose analogues established that 8b acted by inhibition of viral DNA processing whereas 9 and 10 may act via a different mechanism. The lack of a 5'-hydroxymethyl group in all members of this series established that antiviral activity occurred without 5'-phosphorylation, a feature required for the activity of most nucleoside analogues.