1-(benzothiophen-3-yl)-2,2,4,4,4-pentafluoro-3,3-dihydroxybutan-1-one | 1338328-36-1

• 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: 1-(benzothiophen-3-yl)-2,2,4,4,4-pentafluoro-3,3-dihydroxybutan-1-one
• 英文别名: 1-(1-Benzothiophen-3-yl)-2,2,4,4,4-pentafluoro-3,3-dihydroxybutan-1-one
• CAS: 1338328-36-1
• 化学式: C₁₂H₇F₅O₃S
• 分子量: 326.244
• InChiKey: UHKXGTAWMPDXOD-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.2
• 重原子数：
  21
• 可旋转键数：
  3
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.25
• 拓扑面积：
  85.8
• 氢给体数：
  2
• 氢受体数：
  9

反应信息

• 作为反应物：
  描述：

  1-(benzothiophen-3-yl)-2,2,4,4,4-pentafluoro-3,3-dihydroxybutan-1-one 在 Selectfluor 、 三乙胺 、 lithium bromide 作用下， 以 四氢呋喃 为溶剂， 以81%的产率得到1-(benzothiophen-3-yl)-2-bromo-2,2-difluoroethanone
  参考文献：
  名称：

  Synthesis of α-Halo-α,α-difluoromethyl Ketones by a Trifluoroacetate Release/Halogenation Protocol

  摘要：

  Three series of alpha-halo-alpha,alpha-difluoromethyl ketones are prepared from highly alpha-fluorinated gem-dials by exploiting the facile release of trifluoroacetate, followed by immediate trapping of the liberated alpha,alpha-difluoroenolate with an electrophilic chlorine, bromine, or iodine source. The products are typically isolated in good yields, even in the case of sensitive, alpha-iodo-alpha,alpha-difluoromethyl ketones. Also, we demonstrate that an alpha-iodo-alpha,alpha-difluoromethyl ketone will participate in a copper-promoted reaction to forge a new carbon-carbon bond.

  DOI：

  10.1021/jo2017179
• 作为产物：
  描述：

  3-甲醛苯并噻吩 在 戴斯-马丁氧化剂 、 i-Pr₂NMgCl 、 lithium chloride 作用下， 以 四氢呋喃 、 二氯甲烷 为溶剂， 反应 44.0h， 生成 1-(benzothiophen-3-yl)-2,2,4,4,4-pentafluoro-3,3-dihydroxybutan-1-one
  参考文献：
  名称：

  Generation of Magnesium Pentafluoropropen-2-olate from Hexafluoroisopropanol and Synthesis of 2,2,4,4,4-Pentafluoro-3,3-dihydroxyketones

  摘要：

  2,2,4,4,4-Pentafluoro-3,3-dihydroxyketones are valuable precursors to difluoroenolates following fragmentation during the release of trifluoroacetate; however, there are few synthetic strategies to prepare this unique class of compound. We addressed this issue and report a mild, two-step synthesis of 2,2,4,4,4-pentafluoro-3,3-dihydroxyketones from aldehydes. Specifically, aldehydes are treated with pentafluoropropen-2-olate, generated from a new fragmentation of hexafluoroisopropanol with a mixed Mg/Li amide, to give pentafluoroalcohols. A subsequent oxidation with Dess-Martin periodinane provides the targets in good isolated yields.

  DOI：

  10.1021/acs.joc.6b02863

文献信息

• Conversion of methyl ketones and methyl sulfones into α-deutero-α,α-difluoromethyl ketones and α-deutero-α,α-difluoromethyl sulfones in three synthetic steps
  作者：Munia F. Sowaileh、Changho Han、Robert A. Hazlitt、Eun Hoo Kim、Jinu P. John、David A. Colby

  DOI：10.1016/j.tetlet.2016.12.018

  日期：2017.2

  Deuterodifluoromethyl ketones and sulfones were assembled in three synthetic steps from methyl ketones and sulfones, respectively. The key synthetic transformation is the deuteration of the difluorocarbanion generated by the release of trifluoroacetate from highly α-fluorinated gem-diols. High levels of deuterium on the "CF2D" group were routinely observed. This strategy is mild and versatile and it

  在三个合成步骤中，分别从甲基酮和砜中组装了氘代二氟甲基酮和砜。关键的合成转化是由高度α-氟化的宝石二醇释放出三氟乙酸盐而产生的二氟乙二酮的氘代。常规观察到“ CF2D”组的氘水平很高。该策略温和且用途广泛，可用于酮和砜，而无需担心过度氟化或氟化不足。另外的例子解决了当具有其他酸性质子的化合物经受反应条件时的氘化过度的问题。该过程不仅证明了安装“ CF2D”基团的新方法，而且将三氟乙酸盐释放的范围扩展到了砜。
• Magnesium-Promoted Additions of Difluoroenolates to Unactivated Imines
  作者：Alex L. Nguyen、Hari R. Khatri、James R. Woods、Cassidy S. Baldwin、Frank R. Fronczek、David A. Colby

  DOI：10.1021/acs.joc.7b03014

  日期：2018.3.16

  produce fluorinated and trifluoromethylated organic structures, the construction of difluoromethylated compounds remains a synthetic challenge. We have discovered that unactivated imines will react with difluoroenolates under exceedingly mild conditions when using magnesium salts and organic bases. We have applied this approach to the iminoaldol reaction to produce difluoromethylene groups as α,α-dif

  尽管有许多合成方法可以产生氟化和三氟甲基化的有机结构，但是二氟甲基化化合物的结构仍然是一个合成难题。我们发现当使用镁盐和有机碱时，未活化的亚胺会在非常温和的条件下与二氟烯酸酯反应。我们已经将该方法应用于亚氨基醇醛反应以产生作为α，α-二氟-β-氨基-羰基的二氟亚甲基。该方法提供了合成有用量的难以接近的α，α-二氟-β-氨基酮，而无需保护基团或不使用活化的亚胺。此外，我们仅在两个合成步骤中就应用了这种策略来创建双重orexin受体拮抗剂almorexant的类似物。
• Generation of formaldehyde and formaldehyde-d₂ for hydroxymethylations and hydroxydeuteromethylations of difluoroenolates and difluorobenzyl carbanions
  作者：Hari R. Khatri、Changho Han、Reem A. Alkhodier、Amna T. Adam、Baharul Islam、David A. Colby

  DOI：10.1039/d2cc01518h

  日期：——

  A method for the in situ production of formaldehyde from dimethylsulfoxide, bromine, and cesium carbonate is reported for reactions with difluoroenolates and difluorobenzyl carbanions. This process also generates formaldehyde-d2 for the production of 2,2-difluoro-1,1-deuteroethanols. Mechanistic and computational studies further characterize the production of hydroxymethylated and hydroxydeuteromethylated

  报道了一种从二甲基亚砜、溴和碳酸铯原位生产甲醛的方法，用于与二氟烯醇和二氟苄基负碳离子反应。该过程还产生甲醛-d 2用于生产 2,2-二氟-1,1-氘代乙醇。机理和计算研究进一步表征了羟甲基化和羟基氘甲基化二氟化有机分子的产生。
• Synthesis of α-Halo-α,α-difluoromethyl Ketones by a Trifluoroacetate Release/Halogenation Protocol
  作者：Jinu P. John、David A. Colby

  DOI：10.1021/jo2017179

  日期：2011.11.4

  Three series of alpha-halo-alpha,alpha-difluoromethyl ketones are prepared from highly alpha-fluorinated gem-dials by exploiting the facile release of trifluoroacetate, followed by immediate trapping of the liberated alpha,alpha-difluoroenolate with an electrophilic chlorine, bromine, or iodine source. The products are typically isolated in good yields, even in the case of sensitive, alpha-iodo-alpha,alpha-difluoromethyl ketones. Also, we demonstrate that an alpha-iodo-alpha,alpha-difluoromethyl ketone will participate in a copper-promoted reaction to forge a new carbon-carbon bond.
• Generation of Magnesium Pentafluoropropen-2-olate from Hexafluoroisopropanol and Synthesis of 2,2,4,4,4-Pentafluoro-3,3-dihydroxyketones
  作者：Robert A. Hazlitt、Que-Lynn Tran、Munia F. Sowaileh、David A. Colby

  DOI：10.1021/acs.joc.6b02863

  日期：2017.2.17

  2,2,4,4,4-Pentafluoro-3,3-dihydroxyketones are valuable precursors to difluoroenolates following fragmentation during the release of trifluoroacetate; however, there are few synthetic strategies to prepare this unique class of compound. We addressed this issue and report a mild, two-step synthesis of 2,2,4,4,4-pentafluoro-3,3-dihydroxyketones from aldehydes. Specifically, aldehydes are treated with pentafluoropropen-2-olate, generated from a new fragmentation of hexafluoroisopropanol with a mixed Mg/Li amide, to give pentafluoroalcohols. A subsequent oxidation with Dess-Martin periodinane provides the targets in good isolated yields.