Aggregative activation in heterocyclic chemistry. Part 4. Metallation of 2-methoxypyridine: unusual behaviour of the new unimetal superbase BuLi–Me2N(CH2)2OLi (BuLi–LiDMAE)
[EN] SPIROPIPERIDINE ALLOSTERIC MODULATORS OF NICOTINIC ACETYLCHOLINE RECEPTORS<br/>[FR] MODULATEURS ALLOSTÉRIQUES DE SPIROPIPÉRIDINE DE RÉCEPTEURS NICOTINIQUES DE L'ACÉTYLCHOLINE
申请人:MERCK SHARP & DOHME
公开号:WO2020223136A1
公开(公告)日:2020-11-05
The present disclosure relates to compounds of formula (I) that are useful as modulators of 7α nAChR, compositions comprising such compounds, and the use of such compounds for preventing, treating, or ameliorating disease, particularly disorders of the central nervous system such as cognitive impairments in Alzheimer's disease, Parkinson's disease, and schizophrenia, as well as for L-DOPA induced-dyskinesia and inflammation.
Aggregative activation in heterocyclic chemistry. Part 4. Metallation of 2-methoxypyridine: unusual behaviour of the new unimetal superbase BuLi–Me2N(CH2)2OLi (BuLi–LiDMAE)
作者:Philippe Gros、Yves Fort、Paul Caubère
DOI:10.1039/a701914i
日期:——
A series of potential unimetal superbases BuLiâROLi has been studied in order to increase the basicity/nucleophilicity ratio ([B/N]R) of BuLi. The best [B/N]R ratio is found with BuLiâLiDMAE. This complex base apparently metallates 2-methoxypyridine at the unexpected C-6 position. It is shown that no actual metallated species are formed in the reaction medium, the reaction occurring as the result of a common radical precursor stabilized by an aggregate cluster. Finally, as an application, C-6 substituted 2-methoxypyridines have been obtained in good to excellent yields.