✦ LIBER ✦

Racemization of sulphoxides in acetic anhydride catalyzed by Lewis acids

✍ Scribed by Ernst Jonsson

Book ID: 104241037
Publisher: Elsevier Science
Year: 1967
Tongue: French
Weight: 187 KB
Volume: 8
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(01)89771-9

No coin nor oath required. For personal study only.

✦ Synopsis

Eany reactions with dimethyl sulphoxide in acidic medium or acetic anhydride proceed by way of an acyloxy-or alkoxysulphonium ion. Examples are Kornblum oxidation of halogenides, tosglates and alcohols (l), pummerer rearrangements (2) and thiomethoxymethylation of phenols (3).

📜 SIMILAR VOLUMES

Metallic Lewis acids-catalyzed acetylati

Metallic Lewis acids-catalyzed acetylation of alcohols with acetic anhydride and acetic acid in ionic liquids: study on reactivity and reusability of the catalysts

✍ Sang-gi Lee; Jung Hwan Park 📂 Article 📅 2003 🏛 Elsevier Science 🌐 English ⚖ 61 KB

Selective Cyclodimerization and Cyclotri

Selective Cyclodimerization and Cyclotrimerization of Acetals Bearing Electron-Withdrawing Groups Catalyzed by Lewis Acids

✍ Sayuki Maeda; Yasushi Obora; Yasutaka Ishii 📂 Article 📅 2009 🏛 John Wiley and Sons 🌐 English ⚖ 160 KB

Titrimetric Determination of Water and A

Titrimetric Determination of Water and Alcohols by their Acid Catalyzed Reactions with Acetic Anhydride in Organic Media

✍ Toennies, Gerrit; Elliott, Margaret 📂 Article 📅 1935 🏛 American Chemical Society 🌐 English ⚖ 458 KB

Asymmetric aldol addition of aldehydes t

Asymmetric aldol addition of aldehydes to a difluoroketene silyl acetal catalyzed by chiral Lewis acids

✍ Katsuhiko Iseki; Yoshichika Kuroki; Daisuke Asada; Mie Takahashi; Satoshi Kishim 📂 Article 📅 1997 🏛 Elsevier Science 🌐 French ⚖ 667 KB

Aldol reaction of aldehydes with difluomketene ethyl trimethylsilyl acetal (1) in the presence of a substoichiometric amount of chiral Lewis acid 2 or 3 provides the corresponding ~,a-difluom hydroxy esters 4-12 with high enantioselectivitles (up to 98% ee). Reaction temperature has a great influenc

ChemInform Abstract: Ring-Opening Allyla

ChemInform Abstract: Ring-Opening Allylation of Semicyclic N,O-Acetals Catalyzed by a Lewis Acid.

✍ Masaharu Sugiura; Hiroyuki Hagio; Ryoji Hirabayashi; Shu Kobayashi 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 29 KB 👁 2 views

Acylation of alcohols with acetic anhydr

Acylation of alcohols with acetic anhydride catalyzed by TaCl5: Some implications in kinetic resolution

✍ S. Chandrasekhar; T. Ramachander; Mohamed Takhi 📂 Article 📅 1998 🏛 Elsevier Science 🌐 French ⚖ 165 KB

TaCI s and TaClfSilica gel have been effectively used as Lewis acid catalysts for acetylation of alcohols. Also TaClfClairal ligands have been used for kinetic resolution of 2 ° alcohols albeit in low ees.