3-溴-2-甲基环戊-2-烯-1-酮 | 56671-87-5

• 分子结构分类: 有机化合物 - 有机卤素化合物 - 乙烯基卤化物
• 中文名称: 3-溴-2-甲基环戊-2-烯-1-酮
• 英文名称: 3-bromo-2-methylcyclopent-2-en-1-one
• 英文别名: 3-bromo-2-methylcyclopent-2-enone；3-bromo-2-methyl-2-cyclopenten-1-one
• CAS: 56671-87-5
• 化学式: C₆H₇BrO
• 分子量: 175.025
• InChiKey: GXCPEPROSRBVHU-UHFFFAOYSA-N

物化性质

• 沸点：
  206.2±39.0 °C(Predicted)
• 密度：
  1.607±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.3
• 重原子数：
  8
• 可旋转键数：
  0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.5
• 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：

  3-溴-2-甲基环戊-2-烯-1-酮 在 盐酸 、 sodium hydroxide 、 lithium aluminium tetrahydride 作用下， 以 乙醚 、 乙醇 、 丙酮 为溶剂， 反应 16.08h， 生成 甲基环戊烯醇酮
  参考文献：
  名称：

  Matoba, Katsuhide; Tokizawa, Minoru; Morita, Takashi, Chemical and pharmaceutical bulletin, 1985, vol. 33, # 1, p. 368 - 372

  摘要：

  DOI：
• 作为产物：
  描述：

  3-羟基-2-甲基-2-环戊烯酮 在 四溴化碳 、 三苯基膦 作用下， 以 氯仿 为溶剂， 生成 3-溴-2-甲基环戊-2-烯-1-酮
  参考文献：
  名称：

  Convenient Preparation of β-Halovinyl Ketones under Non-Acidic Conditions

  摘要：

  DOI：

  10.1055/s-1975-23896

文献信息

• Preparation of 1-substituted-3,4-dihydronaphthalene-2-carboxaldehyde N,N-dimethylhydrazones by palladium(0) coupling, and their electrocyclic ring closure
  作者：Thomas L. Gilchrist、Maureen A.M. Healy

  DOI：10.1016/s0040-4020(01)86333-x

  日期：1993.3

  involving halogen-metal exchange and palladium(0) catalysed cross coupling, into N,N-dimethylhydrazones of 1-aryl- and 1-vinyl-3,4-dihydronaphthalene-2- carboxaldehydes. The N,N-dimethylhydrazone 10 of the aldehyde 2 undergoes efficient bromine-lithium exchange with butyllithium, as does 2-bromobenzaldehyde N,N-dimethylhydrazone 17. The dimethylhydrazones of 1-vinyl-3,4-dihydronaphthalene-2-carboxaldehydes

  1-溴-3,4-二氢萘-2-甲醛2已通过三种方法转化，分别涉及卤素-金属交换和钯（0）催化的交叉偶联，转化为1-芳基和1-的N，N-二甲基hydr乙烯基-3,4-二氢萘-2-甲醛。的N，N- -dimethylhydrazone 10醛的2所与丁基锂经历高效溴-锂交换，象2-溴苯甲醛-N，N- -dimethylhydrazone 17。的1-乙烯基-3,4-二氢化萘-2-羧醛的dimethylhydrazones不是由后行电环环闭合，随后在溶液中二甲胺的损失，得到5,6-二氢苯并〔分离˚F]异喹啉。当进行气相热解时， 1-芳基-3，4-二氢萘-2-羧醛N，N-二甲基hydr也以相同的方式环化。
• Reaction of β-halo α, β-unsaturated ketones with cuprate reagents. Efficient syntheses of β, β-dialkyl ketones and β-alkyl α,β-unsaturated ketones. A synthesis of (<i>Z</i>)-jasmone
  作者：Edward Piers、Kin Fai Cheng、Isao Nagakura

  DOI：10.1139/v82-185

  日期：1982.5.15

  Treatment of the 3-halo-2-cyclohexen-1-ones 11–15 and 17 with an excess of lithium dimethylcuprate provided good to excellent yields of the corresponding 3,3-dimethylcyclohexanones 21–24. Similar reactions involving the β-bromo cyclopentenones 19 and 20 stopped at the monoaddition stage, producing the cyclopentenones 40 and 43. Reaction of the β-bromo cyclohexenones 12 and 15 with 1.1 equiv. of lithium dimethylcuprate did not effect clean conversion of these substrates into the corresponding 3-methyl-2-cyclohexen-1-ones. When a series of β-bromo enones 12, 14–19 were allowed to react with the lithium (phenylthio)(alkyl)cuprates 44–47, the corresponding β-alkyl enones were, in general, produced cleanly and efficiently. However, reaction of 3-bromo-2-methyl-2-cyclopenten-1-one (19) with the cuprate reagent 44 gave mainly the β-phenylthio enone 49. This undesired result could be avoided by employing, in the place of 19, the β-iodo cyclopentenone 50, which reacted smoothly with 44 to give a high yield of 2,3-dimefhyl-2-cyclopenten-1-one (40). Reaction of 3-bromo-2-cyclohexen-1-one (14) with 3 equiv. of the mixed vinylcuprate reagent 48 gave 3-(3-butenyl)-2-cyclohexen-1-one (32). Alkylation of 1,3-cyclopentanedione with (Z)-1-chloro-2-pentene afforded compound 51, which was converted into the β-bromo enone 52. Treatment of the latter substance with lithium dimethylcuprate provided (Z)-jasmone (53).

  将3-卤代-2-环己烯-1-酮11-15和17与过量的二甲基溴化锂处理，得到相应的3,3-二甲基环己酮21-24，收率良好至优良。涉及β-溴代环戊烯酮19和20的类似反应在单加成阶段停止，产生环戊烯酮40和43。β-溴代环己烯酮12和15与1.1当量的二甲基溴化锂反应未对这些底物进行干净转化为相应的3-甲基-2-环己烯-1-酮产生影响。当一系列β-溴代烯酮12、14-19与苯基硫代烷基铜盐44-47反应时，通常产生相应的β-烷基烯酮，而且效率高。然而，3-溴代-2-甲基-2-环戊烯-1-酮（19）与铜盐试剂44反应主要产生β-苯基硫代烯酮49。通过使用β-碘代环戊烯酮50代替19，可以避免这种不良结果，后者与44反应顺利，产生高收率的2,3-二甲基-2-环戊烯-1-酮（40）。3-溴代-2-环己烯-1-酮（14）与混合乙烯铜盐试剂48的3当量反应产生3-(3-丁烯基)-2-环己烯-1-酮（32）。1,3-环戊二酮与(Z)-1-氯-2-戊烯烷基化生成化合物51，进一步转化为β-溴代烯酮52。后一物质经二甲基溴化锂处理得到(Z)-茉莉酮（53）。
• Discovery of MK-8153, a Potent and Selective ROMK Inhibitor and Novel Diuretic/Natriuretic
  作者：Jinlong Jiang、Fa-Xiang Ding、Xiaoyan Zhou、Thomas J. Bateman、Shuzhi Dong、Xin Gu、Reynalda Keh deJesus、Barbara Pio、Haifeng Tang、Harry R. Chobanian、Dorothy Levorse、Mengwei Hu、Brande Thomas-Fowlkes、Michael Margulis、Martin Koehler、Adam Weinglass、Jack Gibson、Kevin Houle、Joel Yudkovitz、Caryn Hampton、Lee-Yuh Pai、Koppara Samuel、Timothy Cutarelli、Kathleen Sullivan、Emma R. Parmee、Ian Davies、Alexander Pasternak

  DOI：10.1021/acs.jmedchem.1c00406

  日期：2021.6.10

  A renal outer medullary potassium channel (ROMK, Kir1.1) is a putative drug target for a novel class of diuretics with potential for treating hypertension and heart failure. Our first disclosed clinical ROMK compound, 2 (MK-7145), demonstrated robust diuresis, natriuresis, and blood pressure lowering in preclinical models, with reduced urinary potassium excretion compared to the standard of care diuretics

  肾外髓质钾通道（ROMK，Kir1.1）是一类新型利尿剂的推定药物靶点，具有治疗高血压和心力衰竭的潜力。我们首次公开的临床 ROMK 化合物2 (MK-7145) 在临床前模型中表现出强效利尿、利尿和降低血压，与护理利尿剂标准相比，尿钾排泄减少。然而，2预计人类半衰期很短（~5 小时），这可能需要比每天一次更频繁地给药。此外，较短的半衰期会产生较高的峰谷比，这可能会引起过度的峰利尿作用，这是与呋塞米等袢利尿剂相关的常见问题。这份报告描述了一种新的 ROMK 抑制剂的发现22e (MK-8153)，具有更长的预计人类半衰期（~14 小时），这将导致峰谷比降低，有可能推断出更广泛和更好耐受的利尿作用。
• Synthesis of β-chloro, β-bromo, and β-iodo α,β-unsaturated ketones
  作者：Edward Piers、John R. Grierson、Cheuk Kun Lau、Isao Nagakura

  DOI：10.1139/v82-033

  日期：1982.1.15

  A new, efficient method for the preparation of β-chloro, β-bromo, and β-iodo α,β-unsaturated ketones is described. The method involves the reaction of β-diketones or α-hydroxymethylenecycloalkanones with triphenylphosphine dihalides in the presence of triethylamine. With the dichloride and dibromide reagents, the reactions are conveniently carried out in benzene at room temperature, while with triphenylphosphine diiodide the reactions are best performed in refluxing acetonitrile (β-diketones) or in acetonitrile–hexamethylphosphoramide (α-hydroxymethylenecycloalkanones). The reaction of triphenylphosphine diiodide – triethylamine with a series of 4-alkyl-1,3-cyclohexanediones provides mainly or exclusively (depending on the size of the alkyl group) 6-alkyl-3-iodo-2-cyclohexen-1-ones, while reaction of this reagent with 2-hydroxymethylenecyclohexanone and 2-hydroxymethylenecyclopentanone affords stereoselectively and regioselectively (E)-2-iodomethylenecyclohexanone and (E)-2-iodomethylenecyclopentanone, respectively.

  描述了一种制备β-氯、β-溴和β-碘α，β-不饱和酮的新的高效方法。该方法涉及β-二酮或α-羟甲基环戊酮与三苯基膦二卤化物在三乙胺存在下的反应。对于二氯化物和二溴化物试剂，反应通常在苯中室温下进行，而对于三苯基膦二碘化物，最好在回流的乙腈（β-二酮）或乙腈-六甲基磷酰胺（α-羟甲基环戊酮）中进行。三苯基膦二碘化物-三乙胺与一系列4-烷基-1,3-环己二酮的反应主要或仅产生（取决于烷基的大小）6-烷基-3-碘-2-环己烯-1-酮，而该试剂与2-羟甲基环己酮和2-羟甲基环戊酮的反应分别选择性地产生（E）-2-碘甲基环己酮和（E）-2-碘甲基环戊酮。
• Vinylogous acyl triflates as an entry point to α,β-disubstituted cyclic enones <i>via</i> Suzuki–Miyaura cross-coupling
  作者：Daria E. Kim、Yingchuan Zhu、Timothy R. Newhouse

  DOI：10.1039/c8ob02573h

  日期：——

  Suzuki–Miyaura reaction to produce cyclic α,β-disubstituted enones is reported. The use of β-triflyl enones as coupling partners in lieu of their halogenated analogs provides enhanced substrate stability to light and chromatography without adversely affecting reactivity. This protocol allows efficient access to the synthetically challenging α,β-disubstituted enone motif under mild conditions.

  据报道，B-烷基铃木-宫浦反应可产生环状α，β-二取代的烯酮的替代方案。使用β-三氟乙酮烯酮代替其卤代类似物作为偶联伴侣，可增强底物对光和色谱的稳定性，而不会不利地影响反应活性。该协议允许在温和条件下有效访问具有合成挑战性的α，β-二取代的烯酮基序。