The regioselective elaboration of η-pyrrolyl ligands in (η-pyrrolyl)bis(triphenylphosphine)rhenium complexes: a way to 2,5-diphenylpyrrole and some of its N-derivatives
作者:Janusz Zakrzewski
DOI:10.1016/s0022-328x(00)99032-6
日期:1987.10
The η-pyrrolyl complex (η-C4H4N)(Ph3P)2ReH2 (1) was prepared from (Ph3P)2ReH7, 3,3-dimethyl-1-butene and pyrrole, and treated with I2-K2CO3 to give (η-C4H4N)(Ph3P)2ReHI (2). This was treated with PhLi to give (η-2-PhC4H3N)(Ph3P)2ReH2 (3) in high yield. Repeated treatment of 3 with I2-K2CO3 and PhLi gave (η-2,5-Ph2C4H2N)(Ph3P)2ReH2 (4) which was converted into 2,5-diphenylpyrrole, 1-methyl-2,5-diphenylpyrrole
的η吡咯络合物(η-C 4 H ^ 4 N)(PH 3 P)2则热2(1)制备(PH 3 P)2则热7,3,3-二甲基-1-丁烯和吡咯,和与I处理2 -K 2 CO 3,得到(η-C 4 H ^ 4 N)(PH 3 P)2 ReHI(2)。将其用PhLi处理,得到(η-2-PHC 4 ħ 3 N)(PH 3 P)2则热2(3)高产。重复治疗的3与I 2 -K 2 CO 3和PhLi得到(η-2,5--PH 2 c ^ 4 ħ 2 N)(PH 3 P)2则热2(4),将其转化为2,5-二苯基吡咯,1-甲基-2,5-二苯基吡咯和1-苯甲酰基-2,5-二苯基吡咯。