3-bromo-6-pentyl-5-phenylethynyl-2(2H)-pyranone | 475630-88-7

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡喃
• 英文名称: 3-bromo-6-pentyl-5-phenylethynyl-2(2H)-pyranone
• 英文别名: 3-Bromo-6-pentyl-5-(2-phenylethynyl)pyran-2-one；3-bromo-6-pentyl-5-(2-phenylethynyl)pyran-2-one
• CAS: 475630-88-7
• 化学式: C₁₈H₁₇BrO₂
• 分子量: 345.236
• InChiKey: QSZPJAJRZBXNSU-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.5
• 重原子数：
  21
• 可旋转键数：
  6
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.28
• 拓扑面积：
  26.3
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  四甲基锡 、 3-bromo-6-pentyl-5-phenylethynyl-2(2H)-pyranone 在 bis-triphenylphosphine-palladium(II) chloride 作用下， 以 1,2-二氯乙烷 为溶剂， 反应 48.0h， 以8%的产率得到3-methyl-6-pentyl-5-phenylethynyl-2(2H)-pyranone
  参考文献：
  名称：

  New procedures for the selective synthesis of 2(2H)-pyranone derivatives and 3-aryl-4-iodoisocoumarins

  摘要：

  5-Iodo-2(2H)-pyranone derivatives have been selectively synthesized by reaction of stereodefined methyl 2-en-4-ynoates with iodine in MeCN, CH2Cl2 or C6H6 at 20degreesC (Method C) or by treatment of these esters with ICl in CH2Cl2 at 20degreesC (Method B). Methods B and C proved also to be suitable for the preparation of 3-aryl-4-iodoisocoumarins from the corresponding methyl 2-(arylethynyl)benzoates. Interestingly, the high selectivity of iodolactonization of stereodefined methyl 2-en-4-ynoates by Method B allowed preparation in moderate yields of 2(2H)-pyranone derivatives by a one-pot sequence of iodolactonization and Stille-type reactions. (C) 2002 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0040-4020(02)00469-6
• 作为产物：
  描述：

  methyl (E)-2-bromo-2-decen-4-ynoate 在 bis-triphenylphosphine-palladium(II) chloride 、 碘 作用下， 以 1,2-二氯乙烷 、 乙腈 为溶剂， 反应 19.0h， 生成 3-bromo-6-pentyl-5-phenylethynyl-2(2H)-pyranone
  参考文献：
  名称：

  New procedures for the selective synthesis of 2(2H)-pyranone derivatives and 3-aryl-4-iodoisocoumarins

  摘要：

  5-Iodo-2(2H)-pyranone derivatives have been selectively synthesized by reaction of stereodefined methyl 2-en-4-ynoates with iodine in MeCN, CH2Cl2 or C6H6 at 20degreesC (Method C) or by treatment of these esters with ICl in CH2Cl2 at 20degreesC (Method B). Methods B and C proved also to be suitable for the preparation of 3-aryl-4-iodoisocoumarins from the corresponding methyl 2-(arylethynyl)benzoates. Interestingly, the high selectivity of iodolactonization of stereodefined methyl 2-en-4-ynoates by Method B allowed preparation in moderate yields of 2(2H)-pyranone derivatives by a one-pot sequence of iodolactonization and Stille-type reactions. (C) 2002 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0040-4020(02)00469-6

文献信息

• New procedures for the selective synthesis of 2(2H)-pyranone derivatives and 3-aryl-4-iodoisocoumarins
  作者：Matteo Biagetti、Fabio Bellina、Adriano Carpita、Paolo Stabile、Renzo Rossi

  DOI：10.1016/s0040-4020(02)00469-6

  日期：2002.6

  5-Iodo-2(2H)-pyranone derivatives have been selectively synthesized by reaction of stereodefined methyl 2-en-4-ynoates with iodine in MeCN, CH2Cl2 or C6H6 at 20degreesC (Method C) or by treatment of these esters with ICl in CH2Cl2 at 20degreesC (Method B). Methods B and C proved also to be suitable for the preparation of 3-aryl-4-iodoisocoumarins from the corresponding methyl 2-(arylethynyl)benzoates. Interestingly, the high selectivity of iodolactonization of stereodefined methyl 2-en-4-ynoates by Method B allowed preparation in moderate yields of 2(2H)-pyranone derivatives by a one-pot sequence of iodolactonization and Stille-type reactions. (C) 2002 Elsevier Science Ltd. All rights reserved.