(Z)-1-diazo-4-undecen-2-one | 156421-16-8

• 分子结构分类: 有机化合物 - 有机氮化合物
• 英文名称: (Z)-1-diazo-4-undecen-2-one
• 英文别名: (Z)-1-diazoundec-4-en-2-one
• CAS: 156421-16-8
• 化学式: C₁₁H₁₈N₂O
• 分子量: 194.277
• InChiKey: ZHQHAGKYGPIUAP-FPLPWBNLSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.5
• 重原子数：
  14
• 可旋转键数：
  8
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.64
• 拓扑面积：
  19.1
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  (Z)-1-diazo-4-undecen-2-one 在 sodium hydroxide 作用下， 以 乙醇 、 水 为溶剂， 反应 19.0h， 生成 非诺贝特
  参考文献：
  名称：

  Chemistry and Photochemistry Attending the Inactivation of Escherichia coli .beta.-Hydroxydecanoyl Thiol Ester Dehydrase by an Acetylenic Diazoketone

  摘要：

  beta-Hydroxydecanoyl thiol ester dehydrase from Escherichia coli, an enzyme that catalyzes both dehydration and allylic rearrangement reactions, has been shown previously to undergo mechanism-based inactivation by the acetylenic substrate analog 1-diazo-4-undecyn-2-one (DUO). Details of the chemistry and photochemistry of DUO are now presented. Analysis of DUO-inactivated dehydrase by N-15 NMR spectroscopy indicates that DUO quantitatively alkylates histidine-70. Long-wavelength photoirradiation leads to spectrophotometrically observable changes in the DUO-dehydrase adduct. The structural changes were characterized by a combination of methods. Samples of protein that had been inactivated with [1-C-13]-, [(2)-C-13]-, and [3-C-13]DUO were analyzed by C-13 NMR spectroscopy, both prior and subsequent to photoirradiation. By comparisons of the chemical shifts of the enriched atoms of the inactivator moiety with those of model compounds, it was confirmed that the alpha-diazoketone moiety is retained in DUO-inactivated dehydrase and that photoirradiation leads to Wolff rearrangement of the alpha-diazoketone moiety followed by attack of a nucleophile on the resulting ketene. Proteolytic degradation of photoirradiated; DUO-inactivated dehydrase gave peptides that were analyzed by Edman sequencing and by mass spectrometry. The results are consistent with a single protein modification (at H70), and attack on the ketene by water, leading to a carboxylic acid. Samples of intact native, DUO-inactivated, and photoirradiated, DUO-inactivated dehydrase were analyzed by electrospray ionization mass spectrometry, the results of which clearly support the hypothesis that the ketene suffers attack by water. In light of recent results from X-ray crystallography, it is proposed that the water that attacks the ketene is one of two bound water molecules with specific roles in the binding and/or catalytic turnover of substrate. A Michael addition-elimination mechanism is presented to explain the unexpected hydrolytic lability of the DUO-dehydrase adduct.

  DOI：

  10.1021/ja00091a001
• 作为产物：
  描述：

  顺-3-癸烯酸 在 草酰氯 作用下， 以 乙醚 、 二氯甲烷 为溶剂， 反应 16.5h， 生成 (Z)-1-diazo-4-undecen-2-one
  参考文献：
  名称：

  Chemistry and Photochemistry Attending the Inactivation of Escherichia coli .beta.-Hydroxydecanoyl Thiol Ester Dehydrase by an Acetylenic Diazoketone

  摘要：

  beta-Hydroxydecanoyl thiol ester dehydrase from Escherichia coli, an enzyme that catalyzes both dehydration and allylic rearrangement reactions, has been shown previously to undergo mechanism-based inactivation by the acetylenic substrate analog 1-diazo-4-undecyn-2-one (DUO). Details of the chemistry and photochemistry of DUO are now presented. Analysis of DUO-inactivated dehydrase by N-15 NMR spectroscopy indicates that DUO quantitatively alkylates histidine-70. Long-wavelength photoirradiation leads to spectrophotometrically observable changes in the DUO-dehydrase adduct. The structural changes were characterized by a combination of methods. Samples of protein that had been inactivated with [1-C-13]-, [(2)-C-13]-, and [3-C-13]DUO were analyzed by C-13 NMR spectroscopy, both prior and subsequent to photoirradiation. By comparisons of the chemical shifts of the enriched atoms of the inactivator moiety with those of model compounds, it was confirmed that the alpha-diazoketone moiety is retained in DUO-inactivated dehydrase and that photoirradiation leads to Wolff rearrangement of the alpha-diazoketone moiety followed by attack of a nucleophile on the resulting ketene. Proteolytic degradation of photoirradiated; DUO-inactivated dehydrase gave peptides that were analyzed by Edman sequencing and by mass spectrometry. The results are consistent with a single protein modification (at H70), and attack on the ketene by water, leading to a carboxylic acid. Samples of intact native, DUO-inactivated, and photoirradiated, DUO-inactivated dehydrase were analyzed by electrospray ionization mass spectrometry, the results of which clearly support the hypothesis that the ketene suffers attack by water. In light of recent results from X-ray crystallography, it is proposed that the water that attacks the ketene is one of two bound water molecules with specific roles in the binding and/or catalytic turnover of substrate. A Michael addition-elimination mechanism is presented to explain the unexpected hydrolytic lability of the DUO-dehydrase adduct.

  DOI：

  10.1021/ja00091a001