Syntheses of Three New Pyridyl Thienopyridine Ligands<i>via</i>the Hurtley Reaction
作者:Robert O. Steen、Lasse J. Nurkkala、Simon J. Dunne
DOI:10.1002/jhet.903
日期:2012.11
The tridentate pyridyl thienopyridines 5‐phenyl‐7‐(pyridin‐2‐yl)thieno[2,3‐c]pyridine (L1), 7‐(pyridin‐2‐yl)‐5‐(thiophen‐2‐yl)‐thieno[2,3‐c]pyridine (L2) and 5,7‐di(pyridin‐2‐yl)thieno[2,3‐c]pyridine (L3) have been synthesized via the Hurtley reaction. L1 and L2 were synthesized by condensing 3‐bromothiophene‐2‐carboxylic acid with phenyl‐1,3‐butanedione and 1‐thienyl‐1,3‐butanedione respectively.
三齿吡啶基噻吩并吡啶5-苯基-7-(吡啶-2-基)噻吩并[2,3- c ]吡啶(L1),7-(吡啶-2-基)-5-(噻吩-2-基)-噻吩并[2,3- c ]吡啶(L2)和5,7-二(吡啶-2-基)噻吩并[2,3- c ]吡啶(L3)是通过赫特利反应合成的。L1和L2分别通过将3-溴噻吩-2-羧酸与苯基-1,3-丁二酮和1-噻吩-1,3-丁二酮缩合而合成。L3是通过将3-溴噻吩-2-羧酸与苯甲酰基乙腈缩合而合成的。闭环和随后的Negishi或Stille交叉耦合提供L1,L2,和L3的总产量分别为20%,3%和6%。