Chiral metal complexes Part 33. Coordination stereoselectivity in ternary cobalt(III) complexes of dipeptides and an optically active triamine
作者:Paul D. Newman、Peter A. Williams、Frederick S. Stephens、Robert S. Vagg
DOI:10.1016/s0020-1693(00)83007-8
日期:1991.5
characterized. The complexes were prepared by reacting the peptides with the facially coordinated precursor [ OC -6-432- C ]-Co( R,R -benzet)Cl 3 in water. All of the ternary complexes containing a peptide are coordinated meridionally, and are formed stereospecifically, except in one case ( S -valgly). A combination of CD and NMR studies has been used to assign the stereochemistry of the complexes. The assignment
摘要许多[Co(R,R -benzet)(depteptidato)+类型的配合物,其中R,R -benzet为N-苄基-N'-(2-吡啶甲基)-1 R,2 R-二氨基环己烷二肽基团是glygly,gly- S -val,gly- R -val,gly- S -leu,gly- R -leu,S -leugly,R -leugly,S -valgly,S -leu- S-已经合成并表征了ala和S -leu- S -phe,其中gly =甘氨酸,val =缬氨酸,leu =亮氨酸,ala =丙氨酸和phe =苯丙氨酸。通过使肽与面部配位的前体[OC -6-432-C] -Co(R,R-苯并)Cl 3在水中反应来制备复合物。除一种情况(S-valgly)外,所有含有肽的三元复合物在子午线上配位并立体定向形成。CD和NMR研究的组合已用于指定配合物的立体化学。通过对分离出的两种化合物进行低温单