4-pentyl-6,7-methylenedioxyquinolin-2(1H)-one

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 喹啉及其衍生物
• 英文名称: 4-pentyl-6,7-methylenedioxyquinolin-2(1H)-one
• 英文别名: 8-pentyl-5H-[1,3]dioxolo[4,5-g]quinolin-6-one
• 化学式: C₁₅H₁₇NO₃
• 分子量: 259.305
• InChiKey: ZHJRJJKRFSFVOE-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.1
• 重原子数：
  19
• 可旋转键数：
  4
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.4
• 拓扑面积：
  47.6
• 氢给体数：
  1
• 氢受体数：
  3

反应信息

• 作为产物：
  描述：

  2-辛炔酸 在 palladium diacetate N,N'-二环己基碳二亚胺 、 三氟乙酸 作用下， 以 二氯甲烷 为溶剂， 反应 1.0h， 生成 4-pentyl-6,7-methylenedioxyquinolin-2(1H)-one
  参考文献：
  名称：

  New Method for Preparation of Coumarins and Quinolinones via Pd-Catalyzed Intramolecular Hydroarylation of C−C Triple Bonds

  摘要：

  A new and general method has been developed for preparation of coumarins and quinolinones by intramolecular hydroarylation of alkynes. Various aryl alkynoates and alkynanilides undergo fast intramolecular reaction at room temperature in the presence of a catalytic amount of Pd(OAc)(2) in a mixed solvent containing trifluoroacetic acid (TFA), affording coumarins and quinolinones in moderate to excellent yields with more than 1000 turnover numbers (TON) to Pd. The methodology proved to tolerate a number of functional groups such as Br and CHO. On the basis of isotope experiments, a possible mechanism involving ethynyl chelation-assisted electrophilic metalation of aromatic C-H bonds by in-situ generated cationic Pd(II) species has been discussed. Also the involvement of vinylcationic species has been suggested.

  DOI：

  10.1021/jo000861q

文献信息

• New Method for Preparation of Coumarins and Quinolinones via Pd-Catalyzed Intramolecular Hydroarylation of C−C Triple Bonds
  作者：Chengguo Jia、Dongguo Piao、Tsugio Kitamura、Yuzo Fujiwara

  DOI：10.1021/jo000861q

  日期：2000.11.1

  A new and general method has been developed for preparation of coumarins and quinolinones by intramolecular hydroarylation of alkynes. Various aryl alkynoates and alkynanilides undergo fast intramolecular reaction at room temperature in the presence of a catalytic amount of Pd(OAc)(2) in a mixed solvent containing trifluoroacetic acid (TFA), affording coumarins and quinolinones in moderate to excellent yields with more than 1000 turnover numbers (TON) to Pd. The methodology proved to tolerate a number of functional groups such as Br and CHO. On the basis of isotope experiments, a possible mechanism involving ethynyl chelation-assisted electrophilic metalation of aromatic C-H bonds by in-situ generated cationic Pd(II) species has been discussed. Also the involvement of vinylcationic species has been suggested.