作者:Peter Machnitzki、Michael Tepper、Kirsten Wenz、Othmar Stelzer、Eberhardt Herdtweck
DOI:10.1016/s0022-328x(00)00151-0
日期:2000.5
para-and meta-guanidiniumphenyl moieties C6H4NHC(NH2)(NR2)+ (R=H, Me) are accessible in high yields by Pd catalyzed PC coupling reactions between iodophenyl guanidines IC6H4NHC(NH)NR2 (meta-, para-isomers; R=H, Me) and phenyl- or diphenylphosphine. The X-ray structure of 3c·MeOH (space group P212121) has been determined, showing a planar guanidinium group in a NHO and NHCl hydrogen bridged arrangement
单-和双官能胍膦(图3c,图4a,图4b,图5a - 5D,5F)含有对位-和间位guanidiniumphenyl部分C 6 ħ 4 NHC(NH 2)(NR 2)+(R = H,我)是高收率通过钯催化的可访问耦合PC碘苯基胍IC之间的反应6 ħ 4 NHC(NH)NR 2(间位,对位异构体; R = H,Me)的和苯基或二苯膦。3c的X射线结构·测定了MeOH(空间基团P 2 1 2 1 2 1 1),显示出在NH O和NHCl氢桥连接方式中的平面胍基。已经合成了5c的Pd(II)和Mo(0)配合物。讨论了阳离子胍基对5c电子和空间参数的影响。的比较研究图5c,膦酸化的和磺化膦配位体在两相的Pd催化的Suzuki型之间的耦合米-bromophenyldiphenyl氧化膦和对-tolylboronic酸节目5c中要少活性比博士2 PC 6 ħ4 4-PO 3的Na 2。