5-dibromomethylbenzo[b]thiophene-2-boronic acid pinacol ester | 1001200-46-9

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 苯并噻吩类
• 英文名称: 5-dibromomethylbenzo[b]thiophene-2-boronic acid pinacol ester
• 英文别名: 5-(dibromomethyl)-1-benzothiophene-2-boronic acid pinacol ester；2-(5-(Dibromomethyl)benzo[b]thiophen-2-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane；2-[5-(dibromomethyl)-1-benzothiophen-2-yl]-4,4,5,5-tetramethyl-1,3,2-dioxaborolane
• CAS: 1001200-46-9
• 化学式: C₁₅H₁₇BBr₂O₂S
• 分子量: 431.984
• InChiKey: UZHBXPHKGZWMEY-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.99
• 重原子数：
  21
• 可旋转键数：
  2
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.47
• 拓扑面积：
  46.7
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  5-dibromomethylbenzo[b]thiophene-2-boronic acid pinacol ester 在 吡啶 、 水 作用下， 反应 1.67h， 以89%的产率得到2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzothiophene-5-carboxaldehyde
  参考文献：
  名称：

  A versatile method for the hydrolysis of gem-dibromomethylarenes bearing carboxylate or boronate group into aldehydes

  摘要：

  Hydrolysis of geni-dibromomethylarenes bearing carboxylate or boronate group to corresponding aldehydes without affecting the ester group was successfully accomplished in high yields by subjecting them to refluxing pyridine. Both aromatic and heteroaromatic substrates gave the corresponding aldehydes in good yields. This method was efficiently adapted for the large scale synthesis of 2d and 2f. (C) 2007 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2007.11.030
• 作为产物：
  描述：

  5-甲基-2-(4,4,5,5-四甲基-1,3,2-二氧硼杂环戊烷-2-基)-苯并[b]噻吩 在 N-溴代丁二酰亚胺(NBS) 、 过氧化苯甲酰 作用下， 以 四氯化碳 为溶剂， 以81%的产率得到5-dibromomethylbenzo[b]thiophene-2-boronic acid pinacol ester
  参考文献：
  名称：

  A versatile method for the hydrolysis of gem-dibromomethylarenes bearing carboxylate or boronate group into aldehydes

  摘要：

  Hydrolysis of geni-dibromomethylarenes bearing carboxylate or boronate group to corresponding aldehydes without affecting the ester group was successfully accomplished in high yields by subjecting them to refluxing pyridine. Both aromatic and heteroaromatic substrates gave the corresponding aldehydes in good yields. This method was efficiently adapted for the large scale synthesis of 2d and 2f. (C) 2007 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2007.11.030

文献信息

• gem-Dibromomethylarenes as Aldehyde Surrogates in the Pictet-Spengler Synthesis of Tetrahydroisoquinolines and Isoindoloisoquinolones
  作者：John Augustine、Nagaraja Chowdappa、Bailur Sherigara、Kummara Areppa、Ashis Mandal

  DOI：10.1055/s-0030-1258137

  日期：2010.9

  A new variant of the Pictet-Spengler reaction has been developed using gem-dibromomethylarenes as aldehyde surrogates to afford a variety of tetrahydroisoquinoline and isoindoloisoquinolone ring systems in good yields. These systems comprise important motifs in naturally occurring bioactive substances.

  使用偕二溴甲基芳烃作为醛替代物开发了一种新的 Pictet-Spengler 反应变体，以良好的产率提供各种四氢异喹啉和异吲哚并异喹诺酮环系统。这些系统包含天然存在的生物活性物质中的重要基序。
• <i>gem</i>-Dibromomethylarenes:  A Convenient Substitute for Noncommercial Aldehydes in the Knoevenagel−Doebner Reaction for the Synthesis of α<i>,</i>β-Unsaturated Carboxylic Acids
  作者：John Kallikat Augustine、Yanjerappa Arthoba Naik、Ashis Baran Mandal、Nagaraja Chowdappa、Vinuthan B. Praveen

  DOI：10.1021/jo701888m

  日期：2007.12.1

  [Graphics]A facile synthesis of alpha,beta-unsaturated carboxylic acids from gem-dibromomethylarenes is described. gem-Dibromomethylarenes are employed for the first time in the Knoevenagel-Doebner reaction as aldehyde equivalents for the efficient synthesis of alpha,beta-unsaturated carboxylic acids.