7,7-二甲氧基-1-庚炔 | 60090-80-4

• 分子结构分类: 有机化合物 - 有机氧化合物
• 中文名称: 7,7-二甲氧基-1-庚炔
• 英文名称: 7,7-dimethoxy-1-heptyne
• 英文别名: 7,7-dimethoxyhept-1-yne；7,7-Dimethoxy-hept-1-yne
• CAS: 60090-80-4
• 化学式: C₉H₁₆O₂
• mdl: MFCD09032275
• 分子量: 156.225
• InChiKey: ZNHIVTXKRYWFFB-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.9
• 重原子数：
  11
• 可旋转键数：
  6
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.777
• 拓扑面积：
  18.5
• 氢给体数：
  0
• 氢受体数：
  2

安全信息

• 海关编码：
  2909199090

反应信息

• 作为反应物：
  描述：

  7,7-二甲氧基-1-庚炔 在 四(三苯基膦)钯 、 对甲苯磺酸 正丁基锂 、 氢氧化铊(Ⅰ) 作用下， 以 四氢呋喃 、 二氯甲烷 、 水 、 丙酮 为溶剂， 反应 3.24h， 生成
  参考文献：
  名称：

  Enantioselective synthesis of the bottom half of chlorothricolide. 3. Studies of the steric directing group strategy for stereocontrol in intramolecular Diels-Alder reactions

  摘要：

  The intramolecular Diels-Alder reactions of a series of C(7)-alkoxy-substituted 2(E),8(Z),10(E)-undecatrienoates and trienals containing removable C(9)-Br or C(9)-SiMe3 substituents (11, 12, 13, 33, 42, 43, 44, 45) were studied as part of a program directed toward the total synthesis of the bottom half of chlorothricolide. The IMDA reaction of trienoate 3 that lacks a C(9) substituent had previously been shown to cyclize with poor stereoselectivity to a mixture of four cycloadducts. It was expected that the IMDA reactions of trienes containing C(9) substituents (i.e., steric directing groups) would proceed with substantially enhanced stereoselectivity via trans-fused transition state A owing to nonbonded interactions that the steric directing groups experience in the competitive transition states B-D. Cis-fused transition states C and D suffer from serious interactions between C(9)-X and the axial C(6)-H, while trans-fused transition state B is destabilized by a 1,3-eclipsing interaction with the C(7)-alkoxyl group. Only the desired transition state, trans-fused transition state A, suffers from no serious interactions involving the C(9) steric directing group. These predictions were verified experimentally: the trans-fused cycloadduct deriving from A was the major product in all cases. Stereoselectivity for trans-fused cycloadducts was consistently greater, using C(9)-TMS directing groups compared to C(9)-Br substituted systems (for IMDA reactions under analogous conditions), but the C(9)-Br group appeared to have a greater influence on the partition between transition states A and B (see Table I). A surprising aspect of this study, however, is that significant amounts of cis-fused cycloadducts were obtained from the thermal cyclizations of the above-named trienes (12-45%), and this pathway was not entirely suppressed even in the Lewis acid catalyzed cycloadditions of trienals 44 and 45 (5-9% of cis fused cycloadduct). The results with TMS-substituted trienes 33, 42, and 44 thus are in disagreement with an earlier report by Boeckman and Barta (ref 5f) that the IMDA reaction of 33 gives ''a single cycloadduct (> 100:1).'' The cis-fused diastereomers most probably arise via boat-like transition state E rather than the chair-like transition state C. Cis-fused cycloadducts were not observed in the IMDA reaction of TMS-substituted triene 61 that lacks a C(7)-alkoxy substituent, suggesting that the C(7)-alkoxy groups electronically deactivate trans-fused transition state A such that boat-like transition state E is competitive only with substrates containing such C(7)-alkoxy substituents. Data are also presented that show that the C(9)-TMS substituents lead to an increase in reactivity (e.g., the IMDA reaction of 61 that proceeds at ambient temperature and the acid-catalyzed cyclocondensation of TMS diene aldehyde 63). This study defines bromo trienoate 43 as the optimal precursor to the bottom half unit (2) of chlorothricolide, even though the IMDA reaction of 43 is less selective than that of TMS-substituted trienes 42 and 44. The synthesis of 43 (Figure 4) involving the Pd0-catalyzed cross-coupling reaction of dibromo olefin 35 and vinylboronate 37 is shorter and considerably more efficient than the syntheses of TMS trienes 42 and 44, and this compensates for the fact that 43 is the least selective IMDA substrate.Syntheses that proceed by way of TMS trienoates like 42 or TMS trienals like 44 become competitive only if a more efficient triene synthesis is devised.

  DOI：

  10.1021/jo00003a049
• 作为产物：
  描述：

  庚-6-炔醛 、 原甲酸三甲酯 在 硫酸 作用下， 以 甲醇 为溶剂， 反应 0.5h， 以76%的产率得到7,7-二甲氧基-1-庚炔
  参考文献：
  名称：

  硝基烯烃的串联双分子内[4 + 2] / [3 + 2]环加成。对萘乙酸内酯B的全合成研究：哌啶环的构建

  摘要：

  已经完成了两个模型研究，以支持复杂多环生物碱萘甲内酯B的全合成。模型研究的目的是证明使用串联双分子内[4 + 2] / [3 + 2]硝基烯烃环加成反应在天然产物核心中四个环的立体控制结构。第一个模型研究建立了通过修饰双极性亲和物和随后的官能团操纵产生与萘甲内酯B的环A相对应的吡咯烷环的能力。第二个模型研究要求在[4 + 2]环加成中修饰亲双烯体，以适应哌啶环（萘乙内酯B的环B）的形成。硝基烯烃26包含作为二烯的二烯的二烯亲和剂在串联环加成中很好地起作用，以77％的收率得到亚硝基缩醛38a。随后的官能团操纵可实现高产量转化为萘乙内酯B的核心。

  DOI：

  10.1021/jo052001l

文献信息

• Cascade Copper-Catalyzed 1,2,3-Trifunctionalization of Terminal Allenes
  作者：Wanxiang Zhao、John Montgomery

  DOI：10.1021/jacs.6b05216

  日期：2016.8.10

  A cascade cyanation/diborylation of terminal allenes proceeds efficiently with copper catalysis using bis(pinacolato)diboron (B2Pin2) and N-cyano-N-phenyl-p-methylbenzenesulfonamide (NCTS) as reagents. Mechanistic studies suggest that the process proceeds through cyanoborylation of the substituted π-system of the allene followed by hydroboration of the remaining π-component. A wide array of product

  使用双(频哪醇)二硼(B2Pin2)和N-氰基-N-苯基-对-甲基苯磺酰胺(NCTS)作为试剂，在铜催化下，末端丙二烯的级联氰化/二硼化反应有效地进行。机理研究表明，该过程通过丙二烯的取代 π 系统的氰基硼酸化，然后剩余的 π 组分的硼氢化反应进行。可以通过位点选择性交叉偶联和 N-溴代琥珀酰亚胺促进的杂芳基化以及最初获得的加合物的标准氧化和还原转化来获得多种产品衍生物。
• Method for Producing Asymmetric Conjugated Diyne Compound and Method for Producing Z,Z-Conjugated Diene Compound Using the Same
  申请人：Shin-Etsu Chemical Co., Ltd.

  公开号：US20160229829A1

  公开（公告）日：2016-08-11

  Provided are a method for efficiently producing an asymmetric conjugated diyne from an inexpensive and safe alternative compound to hydroxylamine hydrochloride and a method for producing a Z,Z-conjugated diene compound from the asymmetric conjugated diyne compound thus obtained. More specifically, provided is a method for producing an asymmetric conjugated diyne compound comprising a step of subjecting a terminal alkyne compound (1): HC≡C—Z 1 —Y 1 to a coupling reaction with an alkynyl halide (2) Y 2 —Z 2 —C≡C—X by using sodium borohydride in water and an organic solvent in the presence of a copper catalyst and a base to obtain the asymmetric conjugated diyne compound (3): Y 2 —Z 2 —C≡C—C≡C—Z 1 —Y 1 . In addition, provided is a method for producing a Z,Z-conjugated diene compound by reducing the resulting asymmetric conjugated diyne compound, or the like.

  提供了一种从廉价且安全的替代化合物制备不对称共轭二炔的方法，而不是羟胺盐酸盐，并且提供了一种从所得的不对称共轭二炔化合物制备Z,Z-共轭二烯化合物的方法。更具体地，提供了一种制备不对称共轭二炔化合物的方法，包括以下步骤：将末端炔基化合物（1）：HC≡C—Z1—Y1与炔基卤化物（2）Y2—Z2—C≡C—X在水和有机溶剂中使用硼氢化钠、铜催化剂和碱的情况下进行偶联反应，以获得不对称共轭二炔化合物（3）：Y2—Z2—C≡C—C≡C—Z1—Y1。此外，还提供了通过还原所得的不对称共轭二炔化合物等来制备Z,Z-共轭二烯化合物的方法。
• METHOD FOR PRODUCING ASYMMETRIC CONJUGATED DIYNE COMPOUND AND METHOD FOR PRODUCING Z,Z-CONJUGATED DIENE COMPOUND USING THE SAME
  申请人：Shin-Etsu Chemical Co., Ltd.

  公开号：EP3053906A1

  公开（公告）日：2016-08-10

  Provided are a method for efficiently producing an asymmetric conjugated diyne from an inexpensive and safe alternative compound to hydroxylamine hydrochloride and a method for producing a Z,Z-conjugated diene compound from the asymmetric conjugated diyne compound thus obtained. More specifically, provided is a method for producing an asymmetric conjugated diyne compound comprising a step of subjecting a terminal alkyne compound (1): HC≡C-Z1-Y1 to a coupling reaction with an alkynyl halide (2): Y2-Z2-C≡C-X by using sodium borohydride in water and an organic solvent in the presence of a copper catalyst and a base to obtain the asymmetric conjugated diyne compound (3): Y2-Z2-C≡C-C≡C-Z1-Y1. In addition, provided is a method for producing a Z,Z-conjugated diene compound by reducing the resulting asymmetric conjugated diyne compound, or the like.

  本发明提供了一种利用盐酸羟胺的廉价安全替代化合物高效生产不对称共轭二炔的方法，以及一种利用由此获得的不对称共轭二炔化合物生产 Z，Z-共轭二烯化合物的方法。更具体地说，本发明提供了一种生产不对称共轭二炔化合物的方法，该方法包括以下步骤：将端炔化合物 (1)HC≡C-Z1-Y1 与炔基卤化物（2）发生偶联反应：在铜催化剂和碱存在下，在水和有机溶剂中使用硼氢化钠与 Y2-Z2-C≡C-X 进行偶联反应，得到不对称共轭二炔化合物 (3)：Y2-Z2-C≡C-C≡C-Z1-Y1。此外，还提供了一种通过还原得到的不对称共轭二炔化合物或类似物来生产 Z，Z-共轭二烯化合物的方法。
• Hoffmann, Reinhard W.; Sander, Thomas, Liebigs Annalen der Chemie, 1993, # 11, p. 1185 - 1192
  作者：Hoffmann, Reinhard W.、Sander, Thomas

  DOI：——

  日期：——
• Hoffmann, Reinhard W.; Sander, Thomas; Hense, Achim, Liebigs Annalen der Chemie, 1993, # 7, p. 771 - 776
  作者：Hoffmann, Reinhard W.、Sander, Thomas、Hense, Achim

  DOI：——

  日期：——