ethyl 5-oxo-6,7,8,9-tetrahydro-5H-benzo[7]annulene-6-carboxylate | 6742-27-4

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: ethyl 5-oxo-6,7,8,9-tetrahydro-5H-benzo[7]annulene-6-carboxylate
• 英文别名: 5-oxo-6,7,8,9-tetrahydro-5H-benzocycloheptene-6-carboxylic acid ethyl ester；5-Oxo-6,7,8,9-tetrahydro-5H-benzocyclohepten-6-carbonsaeure-aethylester；ethyl 6,7,8,9-tetrahydro-5-oxo-5H-benzocycloheptene-6-carboxylate；ethyl 5-oxo-6,7,8,9-tetrahydrobenzo[7]annulene-6-carboxylate
• CAS: 6742-27-4
• 化学式: C₁₄H₁₆O₃
• 分子量: 232.279
• InChiKey: SRVAVQJNRPJQSO-UHFFFAOYSA-N

物化性质

• 沸点：
  125-134 °C(Press: 1 Torr)
• 密度：
  1.135±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.1
• 重原子数：
  17
• 可旋转键数：
  3
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.43
• 拓扑面积：
  43.4
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  ethyl 5-oxo-6,7,8,9-tetrahydro-5H-benzo[7]annulene-6-carboxylate 在 N-溴代丁二酰亚胺(NBS) 、 sodium azide 作用下， 以 四氯化碳 、 二甲基亚砜 为溶剂， 生成 ethyl 6-azido-5-oxo-8,9-dihydro-7H-benzo[7]annulene-6-carboxylate
  参考文献：
  名称：

  Radical Chain Reactions of α-Azido-β-keto Esters with Tributyltin Hydride. A Novel Entry to Amides and Lactams through Regiospecific Nitrogen Insertion

  摘要：

  A variety of acyclic and carbocyclic alpha-azido-beta-keto esters have been readily prepared from the parent dicarbonyl compounds, and their radical chain reactions with tributyltin hydride have been investigated. These reactions normally result in efficient production of alkoxycarbonyl-substituted amides and lactams and thence provide a new, useful method for regiospecific nitrogen insertion of keto ester compounds. The likely mechanism entails initial addition of tributylstannyl radical to the azido moiety to give a stannylaminyl radical, which readily undergoes intramolecular three-membered cyclization onto the ketone group to form an alkoxyl radical. The alkoxyl radical then undergoes regiospecific beta-scissian to form a stable ring-opened radical that is eventually reduced by tributyltin hydride to propagate the chain. With certain substrates, concomitant deazidation occurs to an important extent. This process, which is unusually observed in radical reactions of alkyl azides, is ascribed to addition of the stannyl radical to the terminal azido nitrogen; subsequent fragmentation of the ensuing 1,3-triazenyl adduct gives stannyl azide and a deazidated alkyl radical, resonance-stabilized by the adjacent carbonyl groups. The radical reactions of 2-azido-2-(ethoxy-carbonyl)-1-tetralone with allyltributylstannane and allyltriphenylstannane have also been investigated with the (missed) aim to achieve nitrogen insertion and concomitant allylation.

  DOI：

  10.1021/jo990837g
• 作为产物：
  描述：

  6-Bromo-5-oxo-6,7,8,9-tetrahydro-5H-benzocycloheptene-6-carboxylic acid ethyl ester 在 sodium azide 、 偶氮二异丁腈 、 三正丁基氢锡 作用下， 以 二甲基亚砜 、 苯 为溶剂， 生成 ethyl 5-oxo-6,7,8,9-tetrahydro-5H-benzo[7]annulene-6-carboxylate
  参考文献：
  名称：

  Radical Chain Reactions of α-Azido-β-keto Esters with Tributyltin Hydride. A Novel Entry to Amides and Lactams through Regiospecific Nitrogen Insertion

  摘要：

  A variety of acyclic and carbocyclic alpha-azido-beta-keto esters have been readily prepared from the parent dicarbonyl compounds, and their radical chain reactions with tributyltin hydride have been investigated. These reactions normally result in efficient production of alkoxycarbonyl-substituted amides and lactams and thence provide a new, useful method for regiospecific nitrogen insertion of keto ester compounds. The likely mechanism entails initial addition of tributylstannyl radical to the azido moiety to give a stannylaminyl radical, which readily undergoes intramolecular three-membered cyclization onto the ketone group to form an alkoxyl radical. The alkoxyl radical then undergoes regiospecific beta-scissian to form a stable ring-opened radical that is eventually reduced by tributyltin hydride to propagate the chain. With certain substrates, concomitant deazidation occurs to an important extent. This process, which is unusually observed in radical reactions of alkyl azides, is ascribed to addition of the stannyl radical to the terminal azido nitrogen; subsequent fragmentation of the ensuing 1,3-triazenyl adduct gives stannyl azide and a deazidated alkyl radical, resonance-stabilized by the adjacent carbonyl groups. The radical reactions of 2-azido-2-(ethoxy-carbonyl)-1-tetralone with allyltributylstannane and allyltriphenylstannane have also been investigated with the (missed) aim to achieve nitrogen insertion and concomitant allylation.

  DOI：

  10.1021/jo990837g

文献信息

• Substituted guanidine derivatives and process for producing the same
  申请人：Sumitomo Pharmaceuticals Company

  公开号：US06369110B1

  公开（公告）日：2002-04-09

  A compound represented by the general formula (1): wherein each of R1, R2, R3, R4 and R5 is a hydrogen atom, an alkyl group, a substituted alkyl group, an alkenyl group, an alkynyl group, a cycloalkyl group, a cycloalkenyl group, a saturated heterocyclic group, an aromatic group, an acyl group or the like; each of Y1, Y2, Y3 and Y4 is a single bond, —CH2—, —O—, —CO— or the like, provided that at least two of Y1 through Y4 are independently a group other than a single bond; and Z may be absent, or one or more Zs may be present and are independently an alkyl group, a substituted alkyl group, an alkenyl group, an alkynyl group, a cycloalkyl group, a cycloalkenyl group, a saturated heterocyclic group, a halogen atom, a carboxyl group, an alkoxycarbonyl group, an aromatic group, an acyl group or the like, is useful as a therapeutic or prophylactic agent for diseases caused by the acceleration of the sodium/proton exchange transport system.

  通式（1）所代表的化合物： 其中R1、R2、R3、R4和R5中的每一个是氢原子、烷基、取代烷基、烯基、炔基、环烷基、环烯基、饱和杂环基、芳香基、酰基或类似物；Y1、Y2、Y3和Y4中的每一个是单键、—CH2—、—O—、—CO—或类似物，前提是至少两个Y1到Y4中的独立团是单键以外的团；以及Z可以不存在，或者一个或多个Z可以存在且独立地是烷基、取代烷基、烯基、炔基、环烷基、环烯基、饱和杂环基、卤素原子、羧基、烷氧羰基、芳香基、酰基或类似物，对于由于钠/质子交换传输系统加速而引起的疾病，具有治疗或预防作用。
• Nickel(II)-Catalyzed Asymmetric Propargyl and Allyl Claisen Rearrangements to Allenyl- and Allyl-Substituted β-Ketoesters
  作者：Yangbin Liu、Haipeng Hu、Haifeng Zheng、Yong Xia、Xiaohua Liu、Lili Lin、Xiaoming Feng

  DOI：10.1002/anie.201404643

  日期：2014.10.20

  Highly efficient catalytic asymmetric Claisen rearrangements of O‐propargyl β‐ketoesters and O‐allyl β‐ketoesters have been accomplished under mild reaction conditions. In the presence of the chiral N,N′‐dioxide/NiII complex, a wide range of allenyl/allyl‐substituted all‐carbon quaternary β‐ketoesters was obtained in generally good yield (up to 99 %) and high diastereoselectivity (up to 99:1 d.r.)

  O-炔丙基β-酮酸酯和O-烯丙基β-酮酸酯的高效催化不对称克莱森重排反应是在温和的反应条件下完成的。在存在手性N，N'-二氧化物/ Ni II配合物的情况下，通常以良好的收率（高达99％）和高的非对映选择性（高达90％）获得各种各样的烯丙基/烯丙基取代的全碳季β-酮酸酯。至99：1 dr）的对映选择性（高达99％ee）。
• A Simple and Effective Method for α-Hydroxylation of β-Dicarbonyl Compounds Using Oxone as an Oxidant without a Catalyst
  作者：Jun Yu、Jian Cui、Chi Zhang

  DOI：10.1002/ejoc.201000940

  日期：2010.12

  Oxone has been found to be a highly efficient reagent for the introduction of a hydroxy group at the α position of a variety of β-dicarbonyl compounds in the homogeneous solvent mixture of water and 1,4-dioxane at 60 °C.

  已发现 Oxone 是一种高效试剂，可在 60 °C 下在水和 1,4-二恶烷的均相溶剂混合物中在各种 β-二羰基化合物的 α 位引入羟基。
• Cyclization and Ring-Expansion Processes Involving Samarium Diiodide Promoted Reductive Formation and Subsequent Oxidative Ring Opening of Cyclopropanol Derivatives
  作者：Hiroyuki Tsuchida、Mutsuko Tamura、Eietsu Hasegawa

  DOI：10.1021/jo802749g

  日期：2009.3.20

  convert to cyclic conjugated enones in moderate to good yields. In addition, the reduction−oxidation reaction sequences can be successfully performed in one pot. The regioselectivities of cyclopropane ring opening in the bicyclic substrates depend on the oxidizing agents used. For example, reactions promoted by FeCl3 with pyridine lead to the expected ring-expansion process involving internal-bond cleavage

  io二碘化物促进了各种α-溴甲基环烷酮的反应，然后用三甲基甲硅烷基氯进行处理，导致嵌在双环[ m .1.0]烷烃骨架中的环丙基甲硅烷基醚的生产。用氧化性电子转移试剂（例如Fe（III），Ce（IV）和Mn（III）盐）处理醚时，会生成扩环酮，并以中等至良好的产率转化为环状共轭烯酮。另外，还原氧化反应序列可以在一锅中成功进行。双环底物中环丙烷开环的区域选择性取决于所用的氧化剂。例如，FeCl 3促进的反应用吡啶导致预期的扩环过程，该过程涉及双环烷烃的内部键裂解并产生环烯酮作为最终产物。相反，与Ce（NH 4）2（NO 3）6或Mn（OAc）3作为氧化剂的反应通过外键裂解进行，得到α-碘甲基环烷酮。
• Organocatalyzed Enantioselective Protonation of Silyl Enol Ethers: Scope, Limitations, and Application to the Preparation of Enantioenriched Homoisoflavones
  作者：Thomas Poisson、Vincent Gembus、Vincent Dalla、Sylvain Oudeyer、Vincent Levacher

  DOI：10.1021/jo101585t

  日期：2010.11.19

  In the present work, enantioselective protonation of silyl enol ethers is reported by means of a variety of chiral nitrogen bases as catalysts, mainly derived from cinchona alkaloids, in the presence of various protic nucleophiles as proton source. A detailed study of the most relevant reaction parameters is disclosed allowing high enantioselectivities of up to 92% ee with excellent yields to be achieved

  在目前的工作中，据报道在各种质子亲核试剂作为质子源的情况下，通过多种手性氮碱作为催化剂，主要衍生自金鸡纳生物碱，对甲硅烷基烯醇醚进行对映选择性质子化。公开了对最相关的反应参数的详细研究，从而允许在温和和环境友好的条件下实现高达92％ee的高对映选择性和极佳的收率。此有机催化质子化的合成效用制备两个homoisoflavones期间展示图4a和4b中，从分离吊兰Inornatum和绵性厌食症，其分别用81％和78％ee的，获得的。