lithium,2-ethynylthiophene | 62439-93-4

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 杂芳族化合物
• 英文名称: lithium,2-ethynylthiophene
• 英文别名: 2-(lithioethynyl)thiophene；(thiophen-2-ylethynyl)lithium；lithium-(2-thienyl)-acetylide
• CAS: 62439-93-4
• 化学式: C₆H₃LiS
• 分子量: 114.097
• InChiKey: KWEYJMKCKKNIEF-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.23
• 重原子数：
  8.0
• 可旋转键数：
  0.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  0.0
• 氢给体数：
  0.0
• 氢受体数：
  1.0

反应信息

• 作为反应物：
  描述：

  lithium,2-ethynylthiophene 在 sodium sulfide 作用下， 以 四氢呋喃 为溶剂， 生成 α-四联噻吩
  参考文献：
  名称：

  Synthesis of .alpha.-thiophene oligomers via 1,3-butadiynes

  摘要：

  DOI：

  10.1021/jo00171a032
• 作为产物：
  描述：

  2-((phenylselanyl)ethynyl)thiophene 、 正丁基锂 生成 lithium,2-ethynylthiophene
  参考文献：
  名称：

  BRAGA, A. L.;COMASSETO, J. V.;PETRAGNANI, N., SYNTHESIS, BRD, 1984, N 3, 240-243

  摘要：

  DOI：

文献信息

• Double Addition of Alkynyllithium Reagents to Amides/Lactams: A Direct and Flexible Synthesis of 3-Amino-1,4-diynes Bearing an Aza-Quaternary Carbon Center
  作者：Hang Chen、Ying-Hong Huang、Jian-Liang Ye、Pei-Qiang Huang

  DOI：10.1021/acs.joc.9b01416

  日期：2019.7.19

  in situ activation of amides with trifluoromethanesulfonic anhydride, followed by double addition of alkynyllithium reagents at a concentration of 0.5 mol·L–1 in dichloromethane. This constitutes an extension of the method of direct reductive bisalkylation of amides that allows both employing alkynyllithium reagents as the first-addition nucleophiles and incorporating an alkynyl group as the first-introduced

  已经建立了从叔酰胺和内酰胺直接和灵活地合成带有氮杂-季碳的3-氨基-1,4-二炔的有效而温和的方案。一锅法包括用三氟甲磺酸酐原位活化酰胺，然后在二氯甲烷中两次添加浓度为0.5mol·L –1的炔基锂试剂。这构成了酰胺直接还原性双烷基化方法的扩展，该方法允许既使用炔基锂试剂作为第一加成亲核试剂，又引入炔基作为第一引入的亲核基团。
• BORATE-BASED BASE GENERATOR, AND BASE-REACTIVE COMPOSITION COMPRISING SUCH BASE GENERATOR
  申请人：WAKO PURE CHEMICAL INDUSTRIES, LTD.

  公开号：US20160340374A1

  公开（公告）日：2016-11-24

  An object of the present invention is to provide a compound which is capable of attaining a composition having high storage stability without reacting with a base-reactive compound, even in the case of storage for a long period of time in a mixed state with the base-reactive compound, such as an epoxy-based compound, as well as capable of generating a strong base (guanidines, biguanides, phosphazenes or phosphoniums) by irradiation of light (active energy rays) or heating; a base generator comprising the compound; and a base-reactive composition comprising the base generator and the base-reactive compound. The present invention relates to the compound represented by the general formula (A); the base generator comprising the compound; and the base-reactive composition comprising the base generator and the base-reactive compound. (wherein R 1 represents an alkyl group; an arylalkynyl group which may be substituted with a halogen atom, an alkyl group, an alkoxy group, or an alkylthio group; an alkenyl group; a 2-furylethynyl group; a 2-thiophenylethynyl group; or a 2,6-dithianyl group; R 2 to R 4 each independently represent an alkyl group; an arylalkynyl group which may be substituted with a halogen atom, an alkyl group, an alkoxy group, or an alkylthio group; the aryl group which may be substituted with a halogen atom, an alkyl group, an alkoxy group, or an alkylthio group; a furanyl group; a thienyl group; or an N-alkyl-substituted pyrrolyl group; Z + represents an ammonium cation having a guanidinium group, a biguanidium group or a phosphazenium group, or a phosphonium cation.)

  本发明的目的是提供一种化合物，能够在与碱反应性化合物混合状态长时间存储的情况下，仍能获得具有高储存稳定性的组合物，而不与碱反应性化合物发生反应，同时还能通过光照（活性能量射线）或加热产生强碱（胍胺、双胍胺、磷氮烷或磷銨）；包括该化合物的碱发生器；以及包括该碱发生器和碱反应性化合物的碱反应性组合物。本发明涉及由通式（A）表示的化合物；包括该化合物的碱发生器；以及包括该碱发生器和碱反应性化合物的碱反应性组合物。（其中R1代表烷基；可能被卤素原子、烷基、烷氧基或烷硫基取代的芳基炔基；烯基；2-呋喃基炔基；2-噻吩基炔基；或2,6-二硫基基；R2到R4各自独立地代表烷基；可能被卤素原子、烷基、烷氧基或烷硫基取代的芳基炔基；可能被卤素原子、烷基、烷氧基或烷硫基取代的芳基；呋喃基；噻吩基；或N-烷基取代的吡咯基；Z+代表具有胍胺基团、双胍胺基团或磷氮烷基团的铵阳离子，或磷銨阳离子。）
• Synthesis of Difluoromethylated and Phosphorated Spiro[5.5]trienones via Dearomative Spirocyclization of Biaryl Ynones
  作者：Yan Zhang、Junhua Zhang、Boyue Hu、Mingming Ji、Shangyi Ye、Gangguo Zhu

  DOI：10.1021/acs.orglett.8b01027

  日期：2018.5.18

  or silver-catalyzed cascade radical addition/dearomative spirocyclization of biaryl ynones with fluoroalkyl bromides or diethylphosphite has been realized for the first time. This method provides a novel and step-economical protocol for the divergent synthesis of a wide range of difluoromethylated or monofluoromethylated and phosphorated spiro[5.5]trienones in moderate to high yields.

  首次实现了用氟代烷基溴化物或亚磷酸二乙酯对联芳基酮的铜或银催化的级联自由基加成/二代化螺环化。该方法为中等至高收率的多种二氟甲基化或单氟甲基化和磷酸化的螺[5.5]三烯酮的发散合成提供了一种新颖且经济的步骤。
• Borate-based base generator, and base-reactive composition comprising such base generator
  申请人：FUJIFILM Wako Pure Chemical Corporation

  公开号：US10100070B2

  公开（公告）日：2018-10-16

  A compound capable of providing a composition having high storage stability without reacting with a base-reactive compound, even when stored in a mixed state with the base-reactive compound, as well as capable of generating a strong base by irradiation of light (active energy rays) or heating. A base generator comprises the compound and a base-reactive composition comprises the base generator and the base-reactive compound. The compound is represented by the general formula (A).

  一种化合物，能够提供一种具有高储存稳定性的组合物，即使在与碱反应化合物混合储存的状态下，也不会与碱反应化合物发生反应，并且能够通过光（活性能量射线）照射或加热生成强碱。碱发生器由该化合物组成，碱反应组合物由碱发生器和碱反应化合物组成。该化合物由通式 (A) 表示。
• Stereoselective Synthesis of Alkynyl <i>C</i>-2-Deoxy-<i>β</i>-<scp>d</scp>-ribofuranosides via Intramolecular Nicholas Reaction:  A Versatile Building Block for Nonnatural <i>C</i>-Nucleosides
  作者：Masayoshi Takase、Tomoyuki Morikawa、Hajime Abe、Masahiko Inouye

  DOI：10.1021/ol027210w

  日期：2003.3.1

  [GRAPHICS]The reaction of 3,5-di-O-benzyl-2-deoxy-D-ribofuranose with various alkynyllithium reagents afforded diastereomeric mixtures of the corresponding ring-opened alkynyldiols. The resulting diastereomeric mixtures were successively treated with CO2(CO)(8), a catalytic amount of TfOH, Et3N, and iodine in one pot to give alkynyl C-3,5-di-O-benzyl-2-deoxy-beta-D-ribofuranosides with high beta-selectivities. The cobalt-mediated cyclization (intramolecular Nicholas reaction) is reversible; thus, thermodynamically more stable beta-anomers were obtained preferentially. The alkynyl C-deoxyribofuranosides were converted to a variety of C-deoxyribofuranoside derivatives.