2,2-dibromo-1-cyclohexyl-1-ethanone | 112741-18-1

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 2,2-dibromo-1-cyclohexyl-1-ethanone
• 英文别名: 2,2-dibromo-1-cyclohexylethanone；2,2-Dibromo-1-cyclohexylethan-1-one
• CAS: 112741-18-1
• 化学式: C₈H₁₂Br₂O
• 分子量: 283.991
• InChiKey: TZHHAYQSRLBLCO-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.7
• 重原子数：
  11
• 可旋转键数：
  2
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.88
• 拓扑面积：
  17.1
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  2,2-dibromo-1-cyclohexyl-1-ethanone 在 氯化二乙基铝 、 甲基磺酰氯 、 三乙胺 、 copper(I) bromide 、 锌 作用下， 以 四氢呋喃 、 正己烷 、 二氯甲烷 为溶剂， 反应 11.0h， 生成 (E)-1-Cyclohexyl-3-[(1R,2R,3aS,6aS)-5-[2-methoxy-eth-(E)-ylidene]-2-(tetrahydro-pyran-2-yloxy)-octahydro-pentalen-1-yl]-propenone
  参考文献：
  名称：

  New method for the introduction of a carbon-carbon triple bond at C-13 in prostaglandin synthesis. Stereocontrolled synthesis of ZK 96 480

  摘要：

  DOI：

  10.1021/jo00241a020
• 作为产物：
  描述：

  (环己基羰基)二溴甲烷 在 4 A molecular sieve 、 pyridinium chlorochromate 作用下， 以 二氯甲烷 为溶剂， 反应 48.0h， 生成 2,2-dibromo-1-cyclohexyl-1-ethanone
  参考文献：
  名称：

  New method for the introduction of a carbon-carbon triple bond at C-13 in prostaglandin synthesis. Stereocontrolled synthesis of ZK 96 480

  摘要：

  DOI：

  10.1021/jo00241a020

文献信息

• Water-controlled selective preparation of α-mono or α,α′-dihalo ketones via catalytic cascade reaction of unactivated alkynes with 1,3-dihalo-5,5-dimethylhydantoin
  作者：Chao Wu、Xiu Xin、Zhi-Min Fu、Long-Yong Xie、Kai-Jian Liu、Zheng Wang、Wenyi Li、Zhi-Hui Yuan、Wei-Min He

  DOI：10.1039/c7gc00283a

  日期：——

  An efficient protocol for the selective synthesis of [small alpha]-mono or [small alpha],[small alpha][prime or minute]-dihalo ketones via a water-controlled chemodivergent and regiospecific cascade reaction has been developed.

  已经开发了通过水控制的化学发散和区域​​特异性级联反应选择性合成[小α]-单或[小α]，[小α] [伯或分钟]-二卤代酮的有效方案。
• Bromination of Enamines from Tertiary Amides Using the Petasis Reagent: A Convenient One-Pot Regioselective Route to Bromomethyl Ketones
  作者：Marwan Kobeissi、Khalil Cherry、Wissam Jomaa

  DOI：10.1080/00397911.2013.765484

  日期：2013.11.2

  bromomethyl ketones is achived using the Petasis reagent (dimethyltitanocene) as a key for enamine generation. Several amides were used to test the limits of the procedure by changing either the alkyl chain R or the amino portion of the starting materials. The enamines generated in situ were allowed to react with bromine at low temperature followed by hydrolysis to yield bromomethyl ketones in excellent

  摘要 使用 Petasis 试剂（二甲基二茂钛）作为烯胺生成的关键，实现了溴甲基酮的原始一锅法合成。通过改变烷基链 R 或起始材料的氨基部分，使用几种酰胺来测试该程序的限制。使原位生成的烯胺在低温下与溴反应，然后水解，以极好的收率（85% 至 95%）得到溴甲基酮。简要讨论了反应的机理细节和最佳条件。本方法提供了几个优点，例如烯胺形成的区域选择性、良好的产率、温和的反应条件和易于实验。[本文提供补充材料。去出版商'
• Ester homologation revisited: a reliable, higher yielding and better understood procedure
  作者：Conrad J. Kowalski、Rajarathnam E. Reddy

  DOI：10.1021/jo00052a038

  日期：1992.12

  Enolate anions 3 and 6, prepared via enolization of a-bromo and dibromo ketones 4 and 5 were converted m high yield to ynolate anions 10 by respective addition of lithium tetramethylpiperidide (to effect deprotonation, 3 --> 7) or butyllithium (to effect metal-halogen exchange, 6 --> 7). Mixtures of such enolates were abo obtainable from esters 1 m a large-scale (25 mmol) via in situ formation and addition of lithiodibromomethane (from methylene bromide and lithium tetramethylpiperidide), followed by treatment of the resulting adducts with lithium hexamethyldisilazide to ensure complete enolization. Addition of sec-butyllithium and n-butyllithium to effect ynolate anion formation, followed by quenching of the reaction mixtures into acidic ethanol, reproducibly afforded homologated esters 8 in 67-90% yield. Demonstrated for ethyl esters 1 having the carbethoxy moiety attached to primary, secondary, tertiary, aryl, and alkenyl groups, this general procedure provides a convenient, large-scale alternative to the classical Arndt-Eistert sequence.
• CARLSON R., ACTA. CHEM. SCAND., 1978, B 32, NO 9, 646-650
  作者：CARLSON R.

  DOI：——

  日期：——
• New method for the introduction of a carbon-carbon triple bond at C-13 in prostaglandin synthesis. Stereocontrolled synthesis of ZK 96 480
  作者：Atsuo Takahashi、Masakatsu Shibasaki

  DOI：10.1021/jo00241a020

  日期：1988.3