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Despite the efficacy of the [Pd2(dba)3]/1 catalyst system for the reactions of lithium triisopropyl 2-pyridylborates with arylbromides , more modest yields of the desired biaryls were obtained in the reactions of the corresponding aryl or heteroaryl chlorides.Employing 2 as the supporting ligand, however, provided a more active catalyst for this transformation.For example, the reaction of A with 4-chloroben-zonitrile furnished the desired productin 73% yield (Table3,entry1) . |
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chemistry2228
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| ÔÚlithium triisopropyl 2-pyridylborates ºÍäå´ú·¼ÌþµÄ·´Ó¦ÖÐÓÉÓÚ [Pd2(dba)3]/1µÄ´ß»¯Ð§¹ûÒ²ÄÜ´ïµ½Ï൱µÄ²úÂÊ¡£È»¶øÔÚÕâ¸ö¹ý³ÌÖÐÈç¹û¼ÓÈë2×öÅäÌåµÄ»°£¬´ß»¯¼ÁµÄ»îÐÔ»á¼ÓÇ¿¡£±ÈÈ磬AÓë4-chloroben-zonitrileµÄ·´Ó¦²úÂʿθߴï73%¡£ |
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