Heterodimerization of Propylene and Vinylarenes: Functional Group Compatibility in a Highly Efficient Ni-Catalyzed Carbon–Carbon Bond-Forming Reaction
作者:Jian Jin、T.V. RajanBabu
DOI:10.1016/s0040-4020(99)01097-2
日期:2000.4
Unlike heterodimerization reactions of ethylene and vinylarenes, no such synthetically useful reactions using propylene are known. We find that propylene reacts with various vinylarenes in the presence of catalytic amounts of [(allyl)NiBr]2, triphenylphosphine and AgOTf giving excellent yields of the dimerization products. The reaction proceeds at 1 atm of propylene at temperatures between −15 and 10°C
与乙烯和乙烯基芳烃的异二聚反应不同,尚无使用丙烯的此类合成有用的反应。我们发现,在催化量的[(烯丙基)NiBr] 2,三苯基膦和AgOTf的存在下,丙烯与各种乙烯基芳烃反应,从而提供了极佳的二聚产物收率。反应在-15至10℃的温度下,在1个大气压的丙烯下进行。这些条件与许多常见的有机官能团相容,例如卤化物,醚,酯,酮和磺酰胺。如预期的那样,区域异构产物的混合物(与丙烯-C 1获得在苄基位置上作为主键的1)。当使用半不稳定的配体(2-二苯基膦基-2'-烷氧基-1,1'-联萘基)时,产物分布似乎显着不同。