(Z)-2-(4-methylbenzylidene)-5-phenylpent-4-ynenitrile | 1072836-51-1

• 分子结构分类: 有机化合物 - 木脂素、新木脂素和相关化合物
• 英文名称: (Z)-2-(4-methylbenzylidene)-5-phenylpent-4-ynenitrile
• CAS: 1072836-51-1
• 化学式: C₁₉H₁₅N
• 分子量: 257.335
• InChiKey: ZEKHIVIJLJUVSR-RGEXLXHISA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.34
• 重原子数：
  20.0
• 可旋转键数：
  2.0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.11
• 拓扑面积：
  23.79
• 氢给体数：
  0.0
• 氢受体数：
  1.0

反应信息

• 作为产物：
  描述：

  2-cyano-1-(p-tolyl)allyl 3-phenylpropiolate 在 2-双环己基膦-2',6'-二甲氧基联苯 、 palladium diacetate 作用下， 以 四氢呋喃 为溶剂， 反应 0.5h， 以70%的产率得到(Z)-2-(4-methylbenzylidene)-5-phenylpent-4-ynenitrile
  参考文献：
  名称：

  高度区域选择性和立体选择性的Pd催化串联烯丙基重排/分子内脱羧反应，衍生自Baylis-Hillman加合物的芳基丙酸酯

  摘要：

  已经开发出高度区域选择性和立体选择性的Pd催化串联烯丙基重排/分子内脱羧的衍生自Baylis-Hillman醇的丙酸芳酯，导致形成一类重要的1,5-二芳基戊-1-烯-4-炔。丙烯酸甲酯衍生的Baylis–Hillman醇的芳基丙酸酯仅提供（E）-1,5-二芳基-1-en-4-ynes，而丙烯腈衍生的Baylis–Hillman醇的芳基丙酸酯仅提供（Z）-1 ，5-二芳基戊-1-烯-4-炔。

  DOI：

  10.1016/j.tetlet.2015.02.125

文献信息

• Pd-catalyzed decarboxylative allylic coupling of acetates of Baylis–Hillman alcohols with propiolic acids: a highly regio- and stereoselective synthesis of 1,5-diarylpent-1-en-4-yne derivatives
  作者：Satyanarayana Tummanapalli、Parthasarathy Muthuraman、Dhanunjaya Naidu Vangapandu、Gnanakalai Shanmugavel、Sanjeeva Kambampati、Kee Wei Lee

  DOI：10.1039/c5ra06168g

  日期：——

  happened via an exclusively SN2′ pathway. Acetates of the Baylis–Hillman alcohols derived from alkyl acrylates, ethyl vinyl ketone and phenyl vinyl sulfone provided exclusively (E)-1,5-diarylpent-1-en-4-ynes while the acetates of the Baylis–Hillman alcohols derived from acrylonitrile provided exclusively (Z)-1,5-diarylpent-1-en-4-ynes.

  Pd催化Baylis-Hillman醇的乙酸酯与炔基羧酸的乙酸脱羧烯丙基偶联导致以高度区域和立体选择性的方式形成重要的1,5-二芳基戊-1-烯-4-炔。脱羧偶联仅通过S N 2'途径发生。衍生自丙烯酸烷基酯，乙基乙烯基酮和苯基乙烯基砜的Baylis-Hillman醇的乙酸盐仅提供（E）-1,5-二芳基戊-1-烯-4-炔，而Baylis-Hillman醇的乙酸盐则衍生自丙烯腈专门提供（Z）-1,5-diarylpent-1-en-4-ynes。
• Indium-mediated alkynylation of Baylis–Hillman acetates: a novel route to 1,4-enynes
  作者：Jhillu S. Yadav、Basi V. Subba Reddy、Nagendra Nath Yadav、Ashutosh Pratap Singh、Madavi Choudhary、Ajit C. Kunwar

  DOI：10.1016/j.tetlet.2008.08.019

  日期：2008.10

  Baylis-Hillman acetates undergo smooth alkynylation with aryl-susbstituted iodoalkynes in the presence of indium metal in refluxing dichloromethane to furnish 1,4-enynes in high yields with (E)-stereoselectivity. In the absence of Lewis acid, the reaction follows both S(N)2 and S(N)2' pathways affording 1:1 mixtures of 1,4-enynes. Upon addition of 10 mol % of InBr(3), the reaction proceeds preferably in the S(N)2' manner. In the case of adducts derived from acrylonitrile, the corresponding products are obtained in fairly good yields and with (Z)-stereoselectivity. (C) 2008 Elsevier Ltd. All rights reserved.