Ethyl-di(propan-2-yloxy)borane | 211628-61-4

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 硼酸衍生物
• 英文名称: Ethyl-di(propan-2-yloxy)borane
• CAS: 211628-61-4
• 化学式: C₈H₁₉BO₂
• 分子量: 158.049
• InChiKey: MPVUFEJHOKMCCW-UHFFFAOYSA-N

物化性质

• 沸点：
  114.9±9.0 °C(Predicted)
• 密度：
  0.806±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.34
• 重原子数：
  11
• 可旋转键数：
  5
• 环数：
  0.0
• sp3杂化的碳原子比例：
  1.0
• 拓扑面积：
  18.5
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  Ethyl-di(propan-2-yloxy)borane 在 硫酸 作用下， 生成 乙基硼酸
  参考文献：
  名称：

  P1 Phenethyl peptide boronic acid inhibitors of HCV NS3 protease

  摘要：

  A series of peptide boronic acids containing extended, hydrophobic P1 residues was prepared to probe the shallow, hydrophobic S1 region of HCV NS3 protease. The p-trifluoromethylphenethyl P1 substituent was identified as optimal with respect to inhibitor potency for NS3 and selectivity against elastase and chymotrypsin. (C) 2002 Published by Elsevier Science Ltd.

  DOI：

  10.1016/s0960-894x(02)00682-0
• 作为产物：
  描述：

  硼酸三异丙酯 、 乙基锂 在 盐酸 作用下， 以 乙醚 为溶剂， 反应 16.0h， 生成 Ethyl-di(propan-2-yloxy)borane
  参考文献：
  名称：

  Characterization of d-boroAla as a Novel Broad-Spectrum Antibacterial Agent Targeting d-Ala-d-Ala Ligase

  摘要：

  d‐boroAla was previously characterized as an inhibitor of bacterial alanine racemase and d‐Ala‐d‐Ala ligase enzymes (Biochemistry, 28, 1989, 3541). In this study, d‐boroAla was identified and characterized as an antibacterial agent. d‐boroAla has activity against both Gram‐positive and Gram‐negative organisms, with minimal inhibitory concentrations down to 8 μg / mL. A structure–function study on the alkyl side chain (NH2‐CHR‐B(OR’)2) revealed that d‐boroAla is the most effective agent in a series including boroGly, d‐boroHomoAla, and d‐boroVal. l‐boroAla was much less active, and N‐acetylation completely abolished activity. An LC‐MS / MS assay was used to demonstrate that d‐boroAla exerts its antibacterial activity by inhibition of d‐Ala‐d‐Ala ligase. d‐boroAla is bactericidal at 1× minimal inhibitory concentration against Staphylococcus aureus and Bacillus subtilis, which each encode one copy of d‐Ala‐d‐Ala ligase, and at 4× minimal inhibitory concentration against Escherichia coli and Salmonella enterica serovar Typhimurium, which each encode two copies of d‐Ala‐d‐Ala ligase. d‐boroAla demonstrated a frequency of resistance of 8 × 10−8 at 4× minimal inhibitory concentration in S. aureus. These results demonstrate that d‐boroAla has promising antibacterial activity and could serve as the lead agent in a new class of d‐Ala‐d‐Ala ligase targeted antibacterial agents. This study also demonstrates d‐boroAla as a possible probe for d‐Ala‐d‐Ala ligase function.

  DOI：

  10.1111/j.1747-0285.2011.01210.x

文献信息

• Identification of a potent and rapidly reversible inhibitor of the 20S-proteasome
  作者：Ashok V. Purandare、Honghe Wan、Naomi Laing、Khalid Benbatoul、Wayne Vaccaro、Michael A. Poss

  DOI：10.1016/j.bmcl.2004.06.084

  日期：2004.9

  Synthesis and in vitro characterization of novel, lactam boronic acid based, selective, and rapidly reversible inhibitor 14 of the 20S-proteasome is presented. (C) 2004 Elsevier Ltd. All rights reserved.
• Organoboranes. 56. Systematic study of the reactions of 1-alkenylboronic esters with representative organolithium and Grignard reagents to provide an efficient, selective synthesis of organyl-1-alkenylborinic esters
  作者：Herbert C. Brown、Nagarajan Vasumathi、Navalkishore N. Joshi

  DOI：10.1021/om00028a021

  日期：1993.4

  A selective reaction of the ''ate'' complexes formed with 1-alkenylboronic esters and organolithium or Grignard reagents, by treatment with either Bronsted or Lewis acids at -78-degrees-C to give the corresponding organylalkenylborinic esters, is explored in this study. This systematic, detailed study reveals that the nature of the alkoxy group on boron, the nature and the amount of the alkyllithium or Grignard reagent used, the solvent, the reaction temperature, and the nature and amount of the acid used all play significant roles in influencing both the yield and the selectivity achieved for the formation of the desired organylalkenylborinates. Optimized procedures for the syntheses of representative organylalkenylborinic esters in high yield are summarized.
• Selective preparation of borinic esters from Grignard reagents and selected trialkoxyboranes
  作者：Thomas E. Cole、Becky D. Haly

  DOI：10.1021/om00038a024

  日期：1992.2

  The reaction of trialkoxyboranes with ethylmagnesium bromide was investigated for the selective alkylation to the symmetrical borinic esters, R2BOR'. Triisopropoxyborane was found to react cleanly with 2 equiv of the Gringnard reagent to form diethylisopropoxyborane at -40-degrees-C. The selectivity of this reaction is largely controlled by the stability of the bromomagnesium diethyldiisopropoxyborate, MgBr[Et2B(O(i)Pr)2]. Triisopropoxyborane was found to be the most selective borane examined, yielding symmetrical borinic esters for primary and aryl derivatives with high selectivities. Secondary alkyl groups showed lower selectivities. This reaction has been developed into a general procedure for preparation of diorganyl-alkoxyboranes from readily available organomagnesium reagents, especially for those containing organic groups which are not accessible via hydroboration.
• Characterization of d-boroAla as a Novel Broad-Spectrum Antibacterial Agent Targeting d-Ala-d-Ala Ligase
  作者：Sandeep Putty、Aman Rai、Darshan Jamindar、Paul Pagano、Cheryl L. Quinn、Takehiko Mima、Herbert P. Schweizer、William G. Gutheil

  DOI：10.1111/j.1747-0285.2011.01210.x

  日期：2011.11

  d‐boroAla was previously characterized as an inhibitor of bacterial alanine racemase and d‐Ala‐d‐Ala ligase enzymes (Biochemistry, 28, 1989, 3541). In this study, d‐boroAla was identified and characterized as an antibacterial agent. d‐boroAla has activity against both Gram‐positive and Gram‐negative organisms, with minimal inhibitory concentrations down to 8 μg / mL. A structure–function study on the alkyl side chain (NH2‐CHR‐B(OR’)2) revealed that d‐boroAla is the most effective agent in a series including boroGly, d‐boroHomoAla, and d‐boroVal. l‐boroAla was much less active, and N‐acetylation completely abolished activity. An LC‐MS / MS assay was used to demonstrate that d‐boroAla exerts its antibacterial activity by inhibition of d‐Ala‐d‐Ala ligase. d‐boroAla is bactericidal at 1× minimal inhibitory concentration against Staphylococcus aureus and Bacillus subtilis, which each encode one copy of d‐Ala‐d‐Ala ligase, and at 4× minimal inhibitory concentration against Escherichia coli and Salmonella enterica serovar Typhimurium, which each encode two copies of d‐Ala‐d‐Ala ligase. d‐boroAla demonstrated a frequency of resistance of 8 × 10−8 at 4× minimal inhibitory concentration in S. aureus. These results demonstrate that d‐boroAla has promising antibacterial activity and could serve as the lead agent in a new class of d‐Ala‐d‐Ala ligase targeted antibacterial agents. This study also demonstrates d‐boroAla as a possible probe for d‐Ala‐d‐Ala ligase function.
• P1 Phenethyl peptide boronic acid inhibitors of HCV NS3 protease
  作者：E.Scott Priestley、Indawati De Lucca、Bahman Ghavimi、Susan Erickson-Viitanen、Carl P. Decicco

  DOI：10.1016/s0960-894x(02)00682-0

  日期：2002.11

  A series of peptide boronic acids containing extended, hydrophobic P1 residues was prepared to probe the shallow, hydrophobic S1 region of HCV NS3 protease. The p-trifluoromethylphenethyl P1 substituent was identified as optimal with respect to inhibitor potency for NS3 and selectivity against elastase and chymotrypsin. (C) 2002 Published by Elsevier Science Ltd.