(E/Z)-6-benzyloxy-2,3-dihydrobenzofuran-3-oxime | 139149-22-7

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 香豆素
• 英文名称: (E/Z)-6-benzyloxy-2,3-dihydrobenzofuran-3-oxime
• 英文别名: N-(6-phenylmethoxy-1-benzofuran-3-ylidene)hydroxylamine
• CAS: 139149-22-7
• 化学式: C₁₅H₁₃NO₃
• 分子量: 255.273
• InChiKey: WZUNJPLWAMCCSP-UHFFFAOYSA-N

物化性质

• 熔点：
  159-160 °C (decomp)
• 沸点：
  448.3±44.0 °C(Predicted)
• 密度：
  1.25±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.2
• 重原子数：
  19
• 可旋转键数：
  3
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.13
• 拓扑面积：
  51
• 氢给体数：
  1
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  (E/Z)-6-benzyloxy-2,3-dihydrobenzofuran-3-oxime 在 盐酸 、 吡啶硼烷 作用下， 以 四氢呋喃 、 甲醇 、 二氯甲烷 为溶剂， 生成 (R)-(-)-N-hydroxy-N-[2,3-dihydro-6-(benzyloxy)benzofuran-3-yl]urea
  参考文献：
  名称：

  Bicyclic N-Hydroxyurea Inhibitors of 5-Lipoxygenase:  Pharmacodynamic, Pharmacokinetic, and in Vitro Metabolic Studies Characterizing N-Hydroxy-N-(2,3-dihydro-6-(phenylmethoxy)-3-benzofuranyl)urea

  摘要：

  A series of N-hydroxyurea derivatives have been prepared and examined as inhibitors of 5-lipoxygenase. Oral activity was established by examining the inhibition of LTB(4) biosynthesis in an ex vivo assay in the mouse. The pharmacodynamic performance in the mouse of selected compounds was assessed using an ex vivo LTB(4) assay and an adoptive peritoneal anaphylaxis assay at extended pretreat times. Compounds with an extended duration of action were reexamined as the individual enantiomers in the ex vivo assay, and the (S) enantiomer of N-hydroxy-N-[2,3-dihydro-6-(phenylmethoxy)-3-benzofuranyl]urea, (+)-1a (SE 202235), was selected as the compound with the best overall profile. Higher plasma concentrations and longer plasma half-lives were found for (+)-1a relative to its enantiomer in the mouse, monkey, and dog. In vitro metabolic studies in mouse liver microsomes established enantiospecific glucuronidation as a likely mechanism for the observed differences between the enantiomers of la. Enantioselective glucuronidation favoring (-)-1a was also found in human liver microsomes.

  DOI：

  10.1021/jm960271d
• 作为产物：
  描述：

  6-苄氧基-2,3-二氢苯并呋喃-3-酮 在 盐酸羟胺 、 sodium acetate 作用下， 以 吡啶 、 乙醇 为溶剂， 反应 2.0h， 以83%的产率得到(E/Z)-6-benzyloxy-2,3-dihydrobenzofuran-3-oxime
  参考文献：
  名称：

  Enantioselective Synthesis of 5-LO Inhibitor Hydroxyureas. Tandem Nucleophilic Addition−Intramolecular Cyclization of Chiral Nitrones

  摘要：

  An enantioselective synthesis of chiral hydroxyurea based 5-lipoxygenase inhibitors is reported via a five-step sequence in about 39% overall yield. The synthesis is based on a novel tandem nucleophilic addition-intramolecular cyclization reaction in which a chiral nitrone functions as the electrophilic acceptor species. A mannose-based chiral auxiliary controls the diastereoselectivity of the reaction in an 8:1 ratio. After the auxiliary removal and appropriate functionalization, a single recrystallization afforded the target structures in > 99% ee.

  DOI：

  10.1021/jo9621736

文献信息

• Asymmetric synthesis of N-substituted N-hydroxyureas
  作者：Krzysztof Z. Łączkowski、Marcin M. Pakulski、Marek P. Krzemiński、Parasuraman Jaisankar、Marek Zaidlewicz

  DOI：10.1016/j.tetasy.2008.03.008

  日期：2008.4

  Asymmetric synthesis of (S)-N-(1-arylethyl)-N-hydroxyureas, (S)-N-(6-methoxy)- and (S)-N-(6-benzyloxy-2,3-dihydrobenzofuran-3-yl)-N-hydroxyurea— lipoxygenase inhibitor, is described. Three approaches to the formation of the N-hydroxyurea moiety at the stereogenic center have been used. The first one, via the reaction of (R)-6-benzyloxy-2,3-dihydrobenzofuran-3-ol with N,O-bis(phenoxycarbonyl)hydroxylamine

  （S）-N-（1-芳基乙基）-N-羟基脲，（S）-N-（6-甲氧基）-和（S）-N-（6-苄氧基-2,3-二氢苯并呋喃-3 ）的不对称合成描述了（β-基）-N-羟基脲-脂氧合酶抑制剂。已经使用了三种在立体发生中心形成N-羟基脲部分的方法。第一种，通过（R）-6-苄氧基-2，3-二氢苯并呋喃-3-醇与N，O-双（苯氧基羰基）羟胺在Mitsunobu条件下反应，得到部分消旋的产物。或者，肟的对映选择性还原可以控制苯乙酮，4-甲氧基-和4-苄氧基苯乙酮，6-甲氧基-和6-苄氧基-2,3-二氢苯并呋喃-3-酮与硼烷/恶唑硼烷的O-苄基醚生成相应的羟胺O-苄基醚或伯胺，它们已以57％到99％ee转化为N-取代的N-羟基脲。