Conformational mobility of substituted 2-methoxychalcones under the action of lanthanide shift reagents

被引：3

作者：

Turov, AV ^{[1
]}

Bondarenko, SP ^{[1
]}

Tkachuk, AA ^{[1
]}

Khilya, VP ^{[1
]}

机构：

[1] Taras Shevchenko Kiev Natl Univ, UA-01033 Kiev, Ukraine

来源：

RUSSIAN JOURNAL OF ORGANIC CHEMISTRY | 2005年 / 41卷 / 01期

关键词：

Oxygen; Organic Chemistry; Carbonyl; Oxygen Atom; Steric Hindrance;

D O I：

10.1007/s11178-005-0118-x

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

Various lanthanide shift reagents Ln(fod)(3) were found to affect the conformational composition of 2-methoxychalcones. Coordination of Yb(fod)(3) occurs mainly at the carbonyl oxygen atom of the substrate, while Eu(fod)(3) and shift reagents derived from other lanthanides coordinate substituted chalcones as bidentate ligands, giving rise to a secondary tetrachelate with the corresponding change of conformation of the substrate molecule. The possibility for chelation is determined by steric hindrances in the vicinity of the substrate coordination centers and concurrent coordination of other electron-donor groups present in the substrate molecule.

引用

页码：47 / 53

页数：7