[EN] 3-(1H-PYRAZOL-4-YL)PYRIDINE ALLOSTERIC MODULATORS OF THE M4 MUSCARINIC ACETYLCHOLINE RECEPTOR [FR] MODULATEURS ALLOSTÉRIQUES DE TYPE 3-(1H-PYRAZOL-4-YL)PYRIDINE DU RÉCEPTEUR MUSCARINIQUE M4 DE L'ACÉTYLCHOLINE
作者:Richard D. Chambers、Martin P. Greenhall、John Hutchinson
DOI:10.1016/0040-4020(95)00883-a
日期:1996.1
In acid media, 1,3-diketones and 1,3-ketoesters can be fluorinated in high yield and often with high conversion mainly to the corresponding 2-fluoro- compounds. Diesters such as diethyl malonate do not react with fluorine under the same reaction conditions. The mechanism of these reactions has been investigated and while the identity of the electrophilic fluorinating species is uncertain, we believe
A method for the fluorination of 1,3-diketones and 1,3-ketoesters is disclosed.
揭示了一种用于1,3-二酮和1,3-酮酯氟化的方法。
N-fluoro perfluoroalkylsulphonimides: efficient reagents for the fluorination of 1,3-dicarbonyl derivatives
作者:Ze-Qi Xu、Darryl D. DesMarteau、Yoshihiko Gotoh
DOI:10.1039/c39910000179
日期:——
Fluorination of 1,3-dicarbonyl derivatives with N-fluoro sulphonimides afforded either 2-fluoro or 2,2-difluoro products in high yields.
1,3-二羰基衍生物与氟磺酰亚胺的氟化反应可以高产率地生成2-氟或2,2-二氟产物。
Reactions of trifluoroamine oxide: a new method for selective fluorination of 1,3-diketones and β-ketoesters
作者:Om D Gupta、Jean'ne M Shreeve
DOI:10.1016/s0040-4039(03)00467-2
日期:2003.3
Fluorination of 1,3-diketones and β-ketoesters with trifluoroamine oxide in the presence of tetrabutylammonium hydroxide (TBAH) provides a one step route to mono- and difluoro-products selectively fluorinated at the α-position in good yields.
Catalysis of the reaction between fluorine and a range of 2-substituted carbonyl compounds has been investigated. Most notably, the preparation of diethyl-2-fluoromalonate has been achieved in high yield by fluorination of diethylmalonate in the presence of hydrated copper nitrate. Reactions between fluorine and carbanions derived from 2-substituted carbonyl compounds, including phosphonates, sulphones