CpCo(CO)2-catalysed cyclotrimerisation of alkynes in supercritical carbon dioxide
作者:Francisco Montilla、Teresa Avilés、Teresa Casimiro、Ana Aguiar Ricardo、Manuel Nunes da Ponte
DOI:10.1016/s0022-328x(01)00856-7
日期:2001.8
complex CpCo(CO)2 as catalyst. The reaction of phenylacetylene produced a mixture of the isomeric cyclotrimers 1,3,5- (2a) and 1,2,4-triphenylbenzene (2a′), in a 1:5 ratio, and traces of cobaltcyclopentadienone complexes CpCo(η4-C4H2[Ph]2CO) (6a, mixture of isomers). The possible product formed by the incorporation of CO2 to alkynes, i.e. diphenylpyrone (7a) was not observed. The reaction of the cobaltacyclopentadiene
单取代的HCCR(R = Ph,a ; CH 2 OH,b ; CH 2 CH 2 CH 2 CH 3,c)和二取代的RCCR(R = CH 2 CH 3,d ;使用容易获得的络合物CpCo(CO)2作为催化剂,在超临界二氧化碳(scCO 2)中研究了CO 2 CH 3,e ; Ph,f)乙炔。苯乙炔的反应产生了异构体环三聚体1,3,5-(2a)和1,2,4-三苯苯(图2a' )中,在1:5的比例,并且cobaltcyclopentadienone的痕迹络合物CpCo(η 4 -C 4 H ^ 2 [PH] 2 CO)(图6a,异构体混合物)。未观察到通过将CO 2掺入炔烃而形成的可能产物,即二苯基吡喃酮(7a)。所述cobaltacyclopentadiene的复杂CpCo(1.4-σ-C的反应4 [PH] 4)(PPH)3(8F),在SCCO 2,进行。没有将CO 2插入CoCσ