通过连续的分子间布赫瓦尔德-哈特维格反应和Pd催化的分子内直接芳基化反应,从市售的2,3-二氯吡啶和取代的苯胺制备了9 H -α-咔啉。发现高反应温度(180°C)和DBU的使用对于3-氯-N-苯基吡啶-2-胺的分子内直接芳基化反应至关重要,因为在120°C时未观察到反应180°C使用不同的无机碱和其他有机碱。另一方面,这些底物的氮甲基化吡啶类似物{ N- [3-氯-1-甲基吡啶-2(1 H)-亚烷基]苯胺}在120°C时确实发生了K 3 PO闭环以4为碱,以良好的收率得到各自的1-甲基-1 H -α-咔啉。
Palladium-catalyzed amination proved to be a valuable strategy for the selective introduction of aromatic and heteroaromatic amines, including aminopyridines and aminodiazines, on dichloropyridines. The use of mild amination conditions resulted in maximum selectivity and excellent base sensitive functional group tolerance.
One-Pot Synthesis of α-Carbolines via Sequential Palladium-Catalyzed Aryl Amination and Intramolecular Arylation
作者:Joydev K. Laha、Philip Petrou、Gregory D. Cuny
DOI:10.1021/jo802776m
日期:2009.4.17
A one-potsynthesis of α-carbolines via a palladium-catalyzed aryl amination followed by intramoleculararylation is described. 2,3-Dichloro- and 2,3-dibromopyridines have been shown to react with readily available anilines to obtain various substituted α-carbolines in moderate to excellent yields.
ECTONUCLEOTIDE PYROPHOSPHATASE-PHOSPHODIESTERASE-1 INHIBITORS AND PHARMACEUTICAL COMPOSITIONS COMPRISING THE SAME
申请人:[en]LEGOCHEM BIOSCIENCES, INC.
公开号:WO2023242631A1
公开(公告)日:2023-12-21
The present disclosure relates compounds for inhibiting ectonucleotide pyrophosphatase/phosphodiesterase-1 (ENPP-1), or a pharmaceutically acceptable salts thereof.