Ligand-Controlled Palladium-Catalyzed Pyridylation of 1-tert-Butoxycarbonyl-3-iodoazetidine: Regioselective Synthesis of 2- and 3-Heteroarylazetidines
摘要:
AbstractThe first efficient regioselective pyridylation of 1‐tert‐butoxycarbonyl‐3‐iodoazetidine to produce 2‐ and 3‐heteroarylazetidines under palladium‐catalyzed conditions has been developed. The established direct pyridylation of azetidines affords 2‐ vs. 3‐heteroarylazetidines in moderate to good yields (up to 92%) and with good regioselectivity (up to 98:2) by using different ligands.magnified image
[EN] PYRAZOLO[3,4-B]PYRIDINES AND IMIDAZO[1,5-B]PYRIDAZINES AS PDE1 INHIBITORS [FR] PYRAZOLO[3,4-B]PYRIDINES ET IMIDAZO[1,5-B]PYRIDAZINES UTILISÉES EN TANT QU'INHIBITEURS DE PDE1
A mesoporous organosilica grafted Pd catalyst (MOG-Pd) for efficient base free and phosphine free synthesis of tertiary butyl esters via tertiary-butoxycarbonylation of boronic acid derivatives without using carbon monoxide
作者:Kajari Ghosh、Rostam Ali Molla、Md. Asif Iqubal、S. M. Islam
DOI:10.1039/c4gc02443e
日期:——
A reusable MOG-Pd catalyst has been synthesized, characterized and it shows high efficiency in tert-butoxycarbonylation under green condition.
已合成、表征并展示出在绿色条件下对叔丁氧羰基化反应具有高效性能的可重复使用的MOG-Pd催化剂。
Preparation of <i>tert</i>-Butyl Esters via Pd-Catalyzed <i>tert</i>-Butoxycarbonylation of (Hetero)aryl Boronic Acid Derivatives
tert-butyl esters from boronic acids or boronic acid pinacol esters and di-t-butyl dicarbonate has been successfully achieved. The cross-coupling reactions can produce up to 94% yields by using palladium acetate and triphenylphosphine as catalyst system, dioxane as a solvent. Moreover, a wide range of substrates including benzenes, pyridines, and quinolines boronic acids or boronic acid pinacol esters can
The invention relates to the use of 1H-imidazo[4,5-c]quinolinone derivatives and salts thereof in the treatment of protein and/or lipid kinase dependent diseases and for the manufacture of pharmaceutical preparations for the treatment of said diseases; 1H-imidazo[4,5-c]quinolinone derivatives for use in the treatment of protein and/or lipid kinase dependent diseases; a method of treatment against said diseases, comprising administering the 1H-imidazo[4,5-c]quinolinone derivatives to a warm-blooded animal, especially a human; pharmaceutical preparations comprising an 1H-imidazo[4,5-c]quinolinone derivative, especially for the treatment of a protein and/or lipid kinase dependent disease; novel 1H-imidazo[4,5-c]quinolinone derivatives; and a process for the preparation of the novel 1H-imidazo[4,5-c]quinolinone derivatives.
The invention relates to the use of 1H-imidazo[4,5-c]quinolinone derivatives and salts thereof in the treatment of protein and/or lipid kinase dependent diseases and for the manufacture of pharmaceutical preparations for the treatment of said diseases; 1H-imidazo[4,5-c]quinolinone derivatives for use in the treatment of protein and/or lipid kinase dependent diseases; a method of treatment against said diseases, comprising administering the 1H-imidazo[4,5-c]quinolinone derivatives to a warm-blooded animal, especially a human; pharmaceutical preparations comprising an 1H-imidazo[4,5-c]quinolinone derivative, especially for the treatment of a protein and/or lipid kinase dependent disease; novel 1H-imidazo[4,5-c]quinolinone derivatives; and a process for the preparation of the novel 1H-imidazo[4,5-c]quinolinone derivatives.