在Pd(OAc)存在的情况下,将2,2'-联噻吩和3,3'-dicyano-2,2'-联噻吩在5-和5'-位置直接与芳基溴进行二芳基化,并伴随CH键断裂2和使用Cs 2 CO 3为碱的庞大的膦配体。在以(2,2'-联噻吩-5-基)二苯基甲醇为底物的反应中,通过CC键裂解在5-位发生的单芳基化反应选择性产生了5-芳基-2,2'-联噻吩和随后的用不同的芳基溴进行芳基化得到相应的不对称的5,5'-二芳基化产物。
dialkylacetylenes as well as diphenylacetylene in the presence of an iridium catalyst accompanied by decarbonylation to produce 1,2,3,4-tetrasubstituted naphthalenes in good yields. Use of 2-naphthoyl chlorides selectively affords the corresponding anthracenederivatives.
bromides at the 5- and 5′-positions accompanied by C–H bondcleavage in the presence of Pd(OAc)2 and a bulky phosphine ligand using Cs2CO3 as base. In the reaction using (2,2′-bithiophen-5-yl)diphenylmethanol as the substrate, monoarylation at the 5-position via C–Cbondcleavage occurs selectively to give 5-aryl-2,2′-bithiophenes and the subsequent arylation with a different aryl bromide affords the
在Pd(OAc)存在的情况下,将2,2'-联噻吩和3,3'-dicyano-2,2'-联噻吩在5-和5'-位置直接与芳基溴进行二芳基化,并伴随CH键断裂2和使用Cs 2 CO 3为碱的庞大的膦配体。在以(2,2'-联噻吩-5-基)二苯基甲醇为底物的反应中,通过CC键裂解在5-位发生的单芳基化反应选择性产生了5-芳基-2,2'-联噻吩和随后的用不同的芳基溴进行芳基化得到相应的不对称的5,5'-二芳基化产物。