[EN] INTERMEDIATES AND PROCESS FOR THE PRODUCTION OF 5-SUBSTITUTED TRICYCLIC BENZIMIDAZOLES<br/>[FR] INTERMÉDIAIRES ET PROCÉDÉ POUR LA PRODUCTION DE BENZIMIDAZOLES TRICYCLIQUES SUBSTITUÉS EN POSITION 5
申请人:NYCOMED GMBH
公开号:WO2008074858A1
公开(公告)日:2008-06-26
[EN] The invention relates to compoun ds of the formula 1-a and 1-b, in which R1, R2, R3, Ar and PG have the meanings as indicated in the description. These compounds are valuable intermediates for the preparation of pharmaceutically active compounds. [FR] L'invention concerne des composés de formule 1-a et 1-b, dans lesquelles formules R1, R2, R3, Ar et PG ont les significations telles qu'indiquées dans la description. Ces composés sont des intermédiaires précieux pour la préparation de composés actifs du point de vue pharmaceutique.
WO2023/34346
申请人:——
公开号:——
公开(公告)日:——
Metal-free hypervalent iodine-promoted tandem carbonyl migration and unactivated C(Ph)–C(Alkyl) bond cleavage for quinolone scaffold synthesis
作者:Li-Rui Song、He Li、Shen-Feng Wang、Jian-Ping Lin、Bin Huang、Ya-Qiu Long
DOI:10.1039/d2cc02245a
日期:——
An unexpected iodine(III)-mediated C(sp3)–C(sp2) bond cleavage of 3-(methylamino)-2-(2-substitutedbenzoyl)acrylates for efficient synthesis of privileged scaffold 4-quinolones was described. Notably, a wide range of alkyl groups (e.g. methyl, tert-butyl or alkyl chain) can be conveniently cleaved in this system. The detailed mechanism studies revealed that the transformation proceeded through cascade