Palladium-catalyzed highly regioselective 2-arylation of 2,x-dibromopyridines and its application in the efficient synthesis of a 17β-HSD1 inhibitor
摘要:
2,3- and 2,5-Dibromopyridines reacted with arylboronic acids, catalyzed by Pd(OAc)(2)/PPh3 in the presence of K2CO3 in CH3CN/MeOH (2:1) at 50 degrees C for 24 h, to afford 2-aiylpyridines in good to high yields, while 2,4-dibromopyridine reacted with arylboronic acid pinacol esters, catalyzed by Pd(OAc)(2)/PPh3 in the presence of KOH in CH3CN at 70 degrees C for 24 h, to afford 2-arylpyridines in good to high yields. To expand this methodology, a 170-HSD1 inhibitor was synthesized in good yield. (C) 2013 Elsevier Ltd. All rights reserved.
The present invention relates to binuclear, trinuclear and tetranuclear metal complexes and to electronic devices, especially organic electroluminescent devices, comprising these metal complexes.
US8461282B2
申请人:——
公开号:US8461282B2
公开(公告)日:2013-06-11
[DE] METALLKOMPLEXE<br/>[EN] METAL COMPLEXES<br/>[FR] COMPLEXES MÉTALLIQUES
申请人:MERCK PATENT GMBH
公开号:WO2019179909A1
公开(公告)日:2019-09-26
Die vorliegende Erfindung betrifft binukleare, trinukleare und tetranukleare Metallkomplexe sowie elektronische Vorrichtungen, insbesondere organische Elektrolumineszenzvorrichtungen, enthaltend diese Metallkomplexe.