(E)-2,5-Diphenyl-1-(methylthio)-1-penten-3-ol | 130613-06-8

• 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: (E)-2,5-Diphenyl-1-(methylthio)-1-penten-3-ol
• 英文别名: (E)-1-methylsulfanyl-2,5-diphenylpent-1-en-3-ol
• CAS: 130613-06-8
• 化学式: C₁₈H₂₀OS
• 分子量: 284.422
• InChiKey: HGASSFBSAZAKQZ-SAPNQHFASA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.6
• 重原子数：
  20
• 可旋转键数：
  6
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.22
• 拓扑面积：
  45.5
• 氢给体数：
  1
• 氢受体数：
  2

反应信息

• 作为产物：
  描述：

  苯丙醛 、 methyl phenylethynyl sulfide 生成 (E)-2,5-Diphenyl-1-(methylthio)-1-penten-3-ol
  参考文献：
  名称：

  Regioselectivity in the reaction of tantalum-unsymmetrical acetylene complexes with carbonyl compounds. Stereoselective preparation of 1-alkenyl sulfides, .alpha.,.beta.-unsaturated esters, and amides

  摘要：

  Tantalum-alkyne complexes, derived by treatment of alkynes with low-valent tantalum (TaCl5 and zinc), react in situ with carbonyl compounds to give (E)-allylic alcohols stereoselectively. When unsymmetrical acetylenes are employed in the reaction, two regioisomeric allylic alcohols are produced. The regioselectivity of the reaction depends on the steric and electronic effects of the substituents on the acetylenes. For example, treatment of tantalum-alkyne complexes derived from methyl alkynyl sulfides with carbonyl compounds yields (E)-3-hydroxy-1-propenyl methyl sulfides in a regioselective manner. Tantalum-alkyne complexes derived from acetylenic esters react with carbonyl compounds regioselectively at the alpha-position of the esters to give Z-isomers of trisubstituted alpha,beta-unsaturated esters. In contrast, tantalum-alkyne complexes derived from acetylenic amides react with carbonyl compounds predominantly at the beta-position of the amides. The regioselectivity of the reaction between acetylenic amides and aldehydes, however, cannot be explained solely in terms of the steric and electronic effects of the substituents. Strong coordination of the amide group to the tantalum center could also be responsible for the observed selectivity, which is opposite to that observed with tantalum-acetylenic ester complexes.

  DOI：

  10.1021/jo00051a023

文献信息

• Regioselectivity in the reaction of tantalum-unsymmetrical acetylene complexes with carbonyl compounds. Stereoselective preparation of 1-alkenyl sulfides, .alpha.,.beta.-unsaturated esters, and amides
  作者：Yasutaka Kataoka、Jiro Miyai、Makoto Tezuka、Kazuhiko Takai、Kiitiro Utimoto

  DOI：10.1021/jo00051a023

  日期：1992.12

  Tantalum-alkyne complexes, derived by treatment of alkynes with low-valent tantalum (TaCl5 and zinc), react in situ with carbonyl compounds to give (E)-allylic alcohols stereoselectively. When unsymmetrical acetylenes are employed in the reaction, two regioisomeric allylic alcohols are produced. The regioselectivity of the reaction depends on the steric and electronic effects of the substituents on the acetylenes. For example, treatment of tantalum-alkyne complexes derived from methyl alkynyl sulfides with carbonyl compounds yields (E)-3-hydroxy-1-propenyl methyl sulfides in a regioselective manner. Tantalum-alkyne complexes derived from acetylenic esters react with carbonyl compounds regioselectively at the alpha-position of the esters to give Z-isomers of trisubstituted alpha,beta-unsaturated esters. In contrast, tantalum-alkyne complexes derived from acetylenic amides react with carbonyl compounds predominantly at the beta-position of the amides. The regioselectivity of the reaction between acetylenic amides and aldehydes, however, cannot be explained solely in terms of the steric and electronic effects of the substituents. Strong coordination of the amide group to the tantalum center could also be responsible for the observed selectivity, which is opposite to that observed with tantalum-acetylenic ester complexes.