octadecyl thiophene-2-carboxylate

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 噻吩类
• 英文名称: octadecyl thiophene-2-carboxylate
• 化学式: C₂₃H₄₀O₂S
• 分子量: 380.635
• InChiKey: SMUFFXGFURCSBS-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  10.8
• 重原子数：
  26
• 可旋转键数：
  19
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.78
• 拓扑面积：
  54.5
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为产物：
  描述：

  噻吩-2-羧酸甲酯 、 硬脂醇 在 iron(III)-acetylacetonate 、 sodium carbonate 作用下， 以 正庚烷 为溶剂， 反应 5.0h， 以96%的产率得到octadecyl thiophene-2-carboxylate
  参考文献：
  名称：

  Transesterification catalyzed by iron(III) β-diketonate species

  摘要：

  A practical and clean protocol for transesterification catalyzed by a 5 mol % cheap, non-toxic and moisture stable Fe(acac)(3) or other iron(III) beta-diketonate species in solvent, such as heptane under azeotropic condition is developed. A remarkable rate enhancement was observed upon the addition of 5 mol % of an inorganic base, such as Na2CO3, which suggests that faster formation of a dimeric mu-alkoxy-bridged iron (III) species under alkaline conditions facilitates catalytic turnover. This system provides smooth transesterification over a wide range of structurally diverse esters and alcohols without disturbing functional groups. In addition, the use of iron beta-diketonate complexes as catalysts is more environmentally friendly, safer, and economical than other transition-metal catalysts. Preliminary mechanistic studies indicate that the active catalyst is likely a dimeric mu-alkoxy-bridged iron(III) species, as determined by X-ray crystallography of [Fe(dbm)(2)(O-n-Bu)](2) derived from the alcoholysis of Fe(dbm)(3) under alkaline conditions. (C) 2011 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2011.01.009

文献信息

• Direct Esterification of Carboxylic Acids with Alcohols Catalyzed by Iron(III) Acetylacetonate Complex
  作者：Shiue-Shien Weng、Fong-Kuang Chen、Chih-Shueh Ke

  DOI：10.1080/00397911.2012.725265

  日期：2013.10.2

  Abstract Direct condensation of carboxylic acids and alcohols with electronic, steric, and functional group variations was carried out using the environmentally benign, moisture-stable, inexpensive, and recoverable iron(III) acetylacetonate [Fe(acac)3] as catalyst (5 mol%). This iron salt efficiently catalyzed the esterification of several primary and secondary alcohols in refluxing xylene, without the need

  摘要 使用环境友好、耐湿、廉价且可回收的乙酰丙酮铁 (III) [Fe(acac)3] 作为催化剂 (5 mol) 进行具有电子、空间和官能团变化的羧酸和醇的直接缩合反应。 %）。这种铁盐有效地催化了回流二甲苯中几种伯醇和仲醇的酯化反应，而无需脱水试剂。通过用苯甲酸对外消旋 1-苯基乙烷-1,2-二醇中的伯醇官能团进行选择性酯化，证明了所提议方案的化学选择性。酯化也适用于未掩蔽的 α-羟基酸、guasaromatic、杂环和 N-保护的氨基酸。补充材料可用于本文。去出版商' 的 Synthetic Communications® 在线版以查看免费的补充文件。图形概要
• Nucleophilic Acyl Substitutions of Esters with Protic Nucleophiles Mediated by Amphoteric, Oxotitanium, and Vanadyl Species
  作者：Chien-Tien Chen、Jen-Huang Kuo、Cheng-Hsiu Ku、Shiue-Shien Weng、Cheng-Yuan Liu

  DOI：10.1021/jo0484878

  日期：2005.2.1

  [GRAPHICS]A diverse array of oxometallic species were examined as catalysts in nucleophilic acyl substitution (NAS) reactions of methyl (or ethyl) esters with protic nucleophiles. Among them, oxotitanium acetylacetonate (TiO(acac)(2)) and vanadyl chloride (VOCl2-(THF)(x)) served as the most efficient and water-tolerant catalysts. Transesterifications of methyl and/or ethyl esters with functionalized (including acid- or base-sensitive) 1degrees and 2degrees alcohols can be carried out chemoselectively in refluxed toluene or xylene in a 1:1 substrate stoichiometry using 1 mol % catalyst loading. The resultant products were furnished in 85-100% yields by simple aqueous workup to remove water-soluble catalysts. The new NAS protocol is also amenable to amines and thiols in 74-91% yields, albeit with higher loading (2.5 equiv) of protic nucleophiles. Representative examples of commercial interests such as Padimate 0 and antioxidant additives for plastics were also examined to demonstrate their practical applications. A 1:1 adduct between TiO(acac)2 and a given 1-octadecanol was identified as (C18H37O)(2)Ti(acac)(2) and was responsible for its subsequent NAS of methyl esters.
• Transesterification catalyzed by iron(III) β-diketonate species
  作者：Shiue-Shien Weng、Chih-Shueh Ke、Fong-Kuang Chen、You-Fu Lyu、Guan-Ying Lin

  DOI：10.1016/j.tet.2011.01.009

  日期：2011.3

  A practical and clean protocol for transesterification catalyzed by a 5 mol % cheap, non-toxic and moisture stable Fe(acac)(3) or other iron(III) beta-diketonate species in solvent, such as heptane under azeotropic condition is developed. A remarkable rate enhancement was observed upon the addition of 5 mol % of an inorganic base, such as Na2CO3, which suggests that faster formation of a dimeric mu-alkoxy-bridged iron (III) species under alkaline conditions facilitates catalytic turnover. This system provides smooth transesterification over a wide range of structurally diverse esters and alcohols without disturbing functional groups. In addition, the use of iron beta-diketonate complexes as catalysts is more environmentally friendly, safer, and economical than other transition-metal catalysts. Preliminary mechanistic studies indicate that the active catalyst is likely a dimeric mu-alkoxy-bridged iron(III) species, as determined by X-ray crystallography of [Fe(dbm)(2)(O-n-Bu)](2) derived from the alcoholysis of Fe(dbm)(3) under alkaline conditions. (C) 2011 Elsevier Ltd. All rights reserved.