5-bromination of an η2-8-quinolyl ligand bound to osmium(II) and subsequent lithiation and derivatization of this functionalized ligand

被引：20

作者：

Clark, AM ^{[1
]}

Rickard, CEF ^{[1
]}

Roper, WR ^{[1
]}

Wright, LJ ^{[1
]}

机构：

[1] Univ Auckland, Dept Chem, Auckland, New Zealand

来源：

ORGANOMETALLICS | 1998年 / 17卷 / 21期

关键词：

D O I：

10.1021/om980583+

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Bromination of the 8-quinolyl ligand in the complex Os(eta(2)-8-quinolyl)Cl(CO)(PPh3)(2) (1) occurs selectively in, the 5-position, para to the osmium-carbon bond. Treatment of the brominated product, Os(eta(2)-8-quinolyl-Br-5)Cl(CO)(PPh3)(2) (2a), with BuLi gives an intermediate lithiated quinolyl species Os(eta(2)-8-quinolyl-Li-5)Cl(CO)(PPh3)(2) (3), which undergoes further reactions typical of aryllithium reagents. Treatment with the representative electrophiles n-BuBr, Bu3SnCl, and Me2NC{O}Me produces Os(eta(2)-8-quinolyl-Bu-5)Cl(CO)(PPh3)(2) (4), Os(eta(2)-8-quinolyl-SnBu3-5)Cl(CO)(PPh3)(2) (5), and Qs(eta(2)-8-quinolyl-C{O}Me-5)Cl(CO)(PPh3)(2) (6), respectively. Crystal structures of Os(eta(2)-8-quinolyl-Br-5)I(CO)(PPh3)(2) (2b) and Os(eta(2)-8-quinolyl-[C{O}Me]-5)Cl(CO)(PPh3)(2) (6) have been determined.

引用

页码：4535 / 4537

页数：3

共 4 条

[1] REINVESTIGATION OF KNOWN BROMINATION REACTIONS OF QUINOLINE [J].