✦ LIBER ✦

The synthesis of organofluorine compounds using potassium fluoride-tetraphenylphosphonium bromide systems

✍ Scribed by James H Clark; Duncan J Macquarrie

Publisher: Elsevier Science
Year: 1987
Tongue: French
Weight: 195 KB
Volume: 28
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(00)95663-6

No coin nor oath required. For personal study only.

✦ Synopsis

SwrrmarU -The reactivity of potassium fluoride in nucleonhilic fluorine transfer reactions can be appreciably enhanced by the presence of tetraphenulphosphonium bromide. Rate acceZerations are especially large in non dipolar aprotic solvents. Phase transfer catalysis (PTC) is one of the most important methods of improving the reactivitv of inorganic reagents which have poor solubilitv in organic solvents. 1 Potassium fluoride (KF) would seem to be a particularly good target for this technique since its solubility In aprotic solvents is very low (ca. 10 -3 molar or less) and both quaternary ammonium salts' and 18-crown-63 have been used to accelerate its reactions. Recent studies on

📜 SIMILAR VOLUMES

A facile synthesis of organofluorine com

A facile synthesis of organofluorine compounds using a semi-molten mixture of tetrabutylammonium bromide and an alkali metal fluoride

✍ Pinaki S. Bhadury; Mamta Pandey; Devendra K. Jaiswal 📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 261 KB

ChemInform Abstract: Organofluorine Comp

ChemInform Abstract: Organofluorine Compounds and Fluorinating Agents. Part 18. Trifluoromethylzinc Bromide as a Reagent for the Preparation of Glycosyl Fluorides.

✍ R. MIETHCHEN; C. HAGER; M. HEIN 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 32 KB 👁 1 views

ChemInform Abstract: Synthesis of Organo

ChemInform Abstract: Synthesis of Organofluorine Compounds Using the Ene Reaction of N-(p-Toluenesulfonyl)trifluoroacetaldehyde Imine.

✍ Shuichi Jonoshita; Atsuhiro Harada; Masaaki Omote; Akira Ando; Itsumaro Kumadaki 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 31 KB 👁 1 views

ChemInform Abstract: Asymmetric Synthesi

ChemInform Abstract: Asymmetric Synthesis of Chiral Organofluorine Compounds: Use of Nonracemic Fluoroidodoacetic Acid as a Practical Electrophile and Its Application to the Synthesis of Monofluoro Hydroxyethylene Dipeptide Isosteres Within a Novel Series of HIV Protease Inhibitors.

✍ Robert V. Hoffman 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 26 KB 👁 2 views

Oxidation of organic substances by compo

Oxidation of organic substances by compounds of trivalent manganese: XXIV. A study of electrochemical and spectrophotometric properties of the Mn(III)Mn(II) system in a medium of potassium fluoride and sulfuric acid

✍ J. Barek; A. Berka; H. Skokánková 📂 Article 📅 1983 🏛 Elsevier Science 🌐 English ⚖ 343 KB

Synthesis of nylon 4 through the use of

Synthesis of nylon 4 through the use of the carbon dioxide/potassium pyrrolydonate catalyst system with and without added 18-Crown-6 ether activator

✍ Robert Y. M. Huang; Ji-Won Rhim 📂 Article 📅 1989 🏛 John Wiley and Sons 🌐 English ⚖ 438 KB 👁 1 views

The anionic polymerization of 2-pyrrolidone at 40°C via CO,/KOH and CO.JKOH/l8-Crown ether catalyst for membrane separation purposea was investigated in detail. The effeds of reaction time, (2% quantity, and potassium hydroxide concentration including crown ether on yield and intrinsic viscoSity wer