1-(4-(tert-butyl)phenyl)-2,2-difluoroethanone

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 1-(4-(tert-butyl)phenyl)-2,2-difluoroethanone
• 英文别名: 1-(4-(tert-butyl)phenyl)-2,2-difluoroethan-1-one；1-(4-tert-Butylphenyl)-2,2-difluoroethanone；1-(4-tert-butylphenyl)-2,2-difluoroethanone
• 化学式: C₁₂H₁₄F₂O
• 分子量: 212.239
• InChiKey: RHPUKBIBYXOXCY-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.1
• 重原子数：
  15
• 可旋转键数：
  3
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.42
• 拓扑面积：
  17.1
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  1-(4-(tert-butyl)phenyl)-2,2-difluoroethanone 在 正丁基锂 、 Rh₂[(S)-1-(4-bromophenyl)-2,2-diphenyl-cyclo-propanecarboxylic acid]₄ 作用下， 以 乙醚 、 二氯甲烷 为溶剂， 反应 13.17h， 生成
  参考文献：
  名称：

  高度官能化的二氟甲基化环丙烷的催化对映选择性合成

  摘要：

  描述了高度官能化的二氟甲基化的环丙烷的第一催化不对称合成。该方法基于铑催化的二氟甲基化烯烃的环丙烷化作用，可使用各种带有酯，酮或硝基官能团的环丙烷。通过使用Rh 2（（S）-BTPCP）4作为催化剂，可以以高收率和高非对映和对映选择性（高达20：1 dr和99％ee）获得相应的产物。该方法学允许首次制备对映体富集的二氟甲基环丙烷。

  DOI：

  10.1002/anie.201707375
• 作为产物：
  描述：

  对叔丁基苯乙酮 在 Selectfluor 作用下， 以 甲醇 、 水 为溶剂， 反应 1.5h， 以1.91 g的产率得到1-(4-(tert-butyl)phenyl)-2,2-difluoroethanone
  参考文献：
  名称：

  Chiral N-benzyl-N-methyl-1-(naphthalen-1-yl)ethanamines and their in vitro antifungal activity against Cryptococcus neoformans, Trichophyton mentagrophytes and Trichophyton rubrum

  摘要：

  In the search for new antifungal compounds and to explore structure activity relationships, a series of 24 chiral benzyl amine type antifungals was synthesised and characterised. In vitro testing against the human pathogen Cryptococcus neoformans revealed that several derivatives had MIC50 values similar to that of the commercial drug Butenafine. All of these contained a bulky group in the para position of the benzyl fragment. Eighteen compounds were also tested for activity against the dermatophytes Trichophyton mentagrophytes and Trichophyton rubrum. Of these (R)-N-(4-tert-butylbenzyI)-N-methyl-1-(naphthalen-1-yl)ethanamine (MIC50,: 0.06 mu g/mL) and a para-benzyloxy substituted derivative (MIC50: 0.125 mu g/mL) possessed high activity. Testing of derivatives with a stereocentre at the benzylic carbon, revealed that (S)-stereochemistry was required for potency: a MIC50 value of 1 mu g/mL was obtained for (S)-1-(4-tert-butylphenyl)-N-methyl-N-(naphthalen-1-ylmethyl)ethanamine. Preparation of the corresponding fluoromethyl compound was achieved employing lipase B from Candida antarctica as catalyst in the key step. A low antifungal activity was observed for the fluorinated derivative indicating the importance of the amine basicity for the antifungal potency of these compounds. (C) 2013 Elsevier Masson SAS. All rights reserved.

  DOI：

  10.1016/j.ejmech.2013.07.043

文献信息

• Synthesis of Difluoromethyl Ketones from Weinreb Amides, and Tandem Addition/Cyclization of <i>o</i> -Alkynylaryl Weinreb Amides
  作者：Jongkonporn Phetcharawetch、Nolan M. Betterley、Darunee Soorukram、Manat Pohmakotr、Vichai Reutrakul、Chutima Kuhakarn

  DOI：10.1002/ejoc.201701322

  日期：2017.12.15

  [Difluoro(phenylsulfanyl)methyl]trimethylsilane (PhSCF2SiMe3) underwent a fluoride-induced nucleophilic addition to the carbonyl group of Weinreb amides to provide the corresponding difluoro(phenylsulfanyl)methyl ketones. These were converted into difluoromethyl ketones through selective reductive cleavage of the phenylsulfanyl group. The reaction of o-alkynyl Weinreb amides derived from benzoic acid derivatives resulted

  [二氟（苯硫基）甲基]三甲基硅烷（PhSCF2SiMe3）与Weinreb酰胺的羰基发生氟化物诱导的亲核加成反应，得到相应的二氟（苯硫基）甲基酮。它们通过苯硫基的选择性还原裂解转化为二氟甲基酮。衍生自苯甲酸衍生物的邻炔基 Weinreb 酰胺的反应导致通过 5-exo-dig 环化形成环化产物。
• Direct and Chemoselective Synthesis of Tertiary Difluoroketones via Weinreb Amide Homologation with a CHF₂-Carbene Equivalent
  作者：Margherita Miele、Andrea Citarella、Nicola Micale、Wolfgang Holzer、Vittorio Pace

  DOI：10.1021/acs.orglett.9b03024

  日期：2019.10.18

  Weinreb amides into difluoromethylketones with a formal nucleophilic CHF2 transfer agent is reported. Activating TMSCHF2 with potassium tert-amylate enables a convenient access to the difluorinated homologation reagent, which adds to the acylating partners. The high chemoselectivity showcased in the presence of variously multifunctionalized Weinreb amides, jointly with uniformly high yields, enables the

  据报道，Weinreb酰胺与正式的亲核CHF2转移剂同化为二氟甲基酮。用叔淀粉戊酸钾激活TMSCHF2可以方便地获得二氟同系化试剂，从而增加了酰化伙伴。在各种多功能的Weinreb酰胺的存在下展现出的高化学选择性以及均一的高收率，使得该策略可普遍适用，而无需任何假定的碳负离子稳定化元素。
• Carbonylation of Difluoroalkyl Bromides Catalyzed by Palladium
  作者：Hai-Yang Zhao、Zhang Feng、Zhiji Luo、Xingang Zhang

  DOI：10.1002/anie.201605380

  日期：2016.8.22

  Although important progress has been made in the fluoroalkylation reactions, the transition‐metal‐catalyzed carbonylative fluoroalkylation reaction remains challenging so far. Herein, we report the first example of a Pd‐catalyzed carbonylation of difluoroalkyl bromides with (hetero)arylboronic acids under one atmosphere pressure of CO. The reaction can also be extended to the aryl potassium trifluoroborate

  尽管在氟代烷基化反应方面已取得重要进展，但到目前为止，过渡金属催化的羰基化氟代烷基化反应仍然具有挑战性。在本文中，我们报道了在一个大气压的CO下用（杂）芳基硼酸进行Pd催化的二氟烷基溴化物羰基化的第一个例子。反应还可以扩展到芳基三氟硼酸钾盐。该协议的优点是合成简便，广泛的底物范围和出色的官能团相容性。所得的二氟烷基酮可用作合成各种有用的氟化化合物的通用结构单元。
• A Carbene Strategy for Progressive (Deutero)Hydrodefluorination of Fluoroalkyl Ketones
  作者：Xiaolong Zhang、Xinyu Zhang、Qingmin Song、Paramasivam Sivaguru、Zikun Wang、Giuseppe Zanoni、Xihe Bi

  DOI：10.1002/anie.202116190

  日期：2022.2.7

  A carbene strategy for the sequential (deutero)hydrodefluorination of fluoroalkyl ketones is reported. This method allowed for the controllable preparation of difluoroalkyl- and monofluoroalkyl ketones from aryl- and alkyl-substituted perfluoroalkyl ketones in high yield with excellent functional group tolerance.

  报道了一种用于氟代烷基酮顺序（氘代）加氢脱氟的卡宾策略。该方法允许从芳基和烷基取代的全氟烷基酮以高产率可控制备二氟烷基酮和单氟烷基酮，并具有优异的官能团耐受性。
• Direct Access to α,α-Difluoroacylated Arenes by Palladium-Catalyzed Carbonylation of (Hetero)Aryl Boronic Acid Derivatives
  作者：Thomas L. Andersen、Mette W. Frederiksen、Katrine Domino、Troels Skrydstrup

  DOI：10.1002/anie.201604152

  日期：2016.8.22

  of (hetero)aryl boronates or boronic acid salts with carbon monoxide and α‐bromo‐α,α‐difluoroamides and bromo‐α,α‐difluoroesters is described herein. The method is useful for the synthesis of a diverse selection of (hetero)aryl α,α‐difluoro‐β‐ketoamides and α,α‐difluoro‐β‐ketoesters, which are useful building blocks for the generation of functionalized difluoroacylated and difluoroalkyl arenes. The

  本文描述了（杂）芳基硼酸盐或硼酸盐与一氧化碳和α-溴-α，α-二氟酰胺和溴-α，α-二氟酯的钯催化羰基偶合。该方法可用于合成多种选择的（杂）芳基α，α-二氟-β-酮酰胺和α，α-二氟-β-酮酸酯，它们是生成功能化二氟酰化和二氟烷基芳烃的有用组成部分。该方法可以进一步扩展到用于形成二氟苯乙酮的一锅法实验方案。