A direct Csp3–H bond oxidative thioesterification of methyl ketones with aromatic thiols/disulfides promoted by TBAI/K2S2O8 has been developed. The reaction provides successfully a simple and efficientmethod for the synthesis of functionalized α-ketothioesters of aromatic thiols. This practical methodology exhibits readily available starting materials, large-scale applicability, synthetic application
已经开发了由TBAI / K 2 S 2 O 8促进的甲基酮与芳族硫醇/二硫化物的直接C sp3- H键氧化硫酯化反应。该反应成功地提供了一种简单而有效的方法来合成芳族硫醇的官能化α-酮硫酯。这种实用的方法论展示了容易获得的起始原料,大规模的适用性,合成的应用以及广泛的官能团耐受性。提出了一种可能的转换机制。
Non‐Bonding 1,4‐Sulphur‐Oxygen Interaction Governs the Reactivity of α‐Ketothioesters in Triphenylphosphine‐Catalyzed Cyclization with Acetylenedicarboxylates
作者:Abhijit Bankura、Jayanta Saha、Rajib Maity、Indrajit Das
DOI:10.1002/adsc.202001376
日期:2021.2.16
1,4‐interaction involving C−S σ* orbital on the sulphuratom and the lone pair of electrons in the electron‐donating oxygen atom. This is apparent from the X‐ray crystallographically determined internuclear distance between the sulphur and ketone (C=O) oxygen atoms (2.71–2.85 Å), which is significantly less than the sum of their van der Waals radii (3.25–3.30 Å). The substitution on the S atom is oriented
PUMMERER REARRANGEMENT PROMOTED BY POLYPHOSPHORIC ACID TRIMETHYLSILYL ESTER (PPSE)
作者:Masa-aki Kakimoto、Yoshio Imai
DOI:10.1246/cl.1984.1831
日期:1984.10.5
It was found that PPSE catalyzed Pummerer rearrangement of various types of sulfoxides. When α-(phenylsulfinyl)acetophenone was used as sulfoxide, unusual product, phenyl phenylthioglyoxylate was isolated. The reaction seems to proceed via phosphorylation of oxygen of sulfoxides.
α-Keto Thioesters as Building Blocks for Accessing γ-Hydroxybutenolides and Oxazoles
作者:Kanchan Mal、Indrajit Das
DOI:10.1002/adsc.201700329
日期:2017.8.7
found to react differently with β‐keto esters and isocyanoacetates. They undergo base induced Knoevenagel‐type condensation on the keto carbonyl group with β‐keto esters, followed by intramolecular cyclization and water addition leads to highly substituted γ‐hydroxybutenolides. On the other hand, substituted oxazole derivatives have been obtained using isocyanoacetates via nucleophilic displacement on the
A method for Ni-catalyzed controlled decarbonylation of α-ketothioesters is described. Mono- and double-decarbonylations, which gave thioesters and thioethers, respectively, were selectively achieved by changing the ligand. A fundamental study of Ni-catalyzed decarbonylation of α-ketothioesters is presented.