Silica gel anchored chiral Mn(III)salen complexes for enantioselective epoxidation of unfunctionalised olefins

被引：40

作者：

Choudary, BM ^{[1
]}

Chowdari, NS ^{[1
]}

Kantam, ML ^{[1
]}

Santhi, PL ^{[1
]}

机构：

[1] Indian Inst Chem Technol, Hyderabad 500007, Andhra Pradesh, India

来源：

CATALYSIS LETTERS | 2001年 / 76卷 / 3-4期

关键词：

asymmetric epoxidation; Mn(III)salen complex; olefins; heterogeneous catalysis;

D O I：

10.1023/A:1012317827817

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Heterogeneous Mn(III) chiral salen complexes are prepared through covalent attachment of salen ligand on silica gel via chloropropyl spacer and subsequent complexation with manganese. The complexes are well characterized by IR, UV/VIS, TGA and elemental analysis. Epoxidation of unfunctionalised prochiral olefins by Mn(III) chiral salen complexes using iodosobenzene and m-CPBA as the terminal oxidants and NMO as a co-oxidant was achieved with good yields albeit low enantiomeric excess.

引用

页码：213 / 218

页数：6

共 17 条

[1] Synthesis and characterization of a polymer-supported salen ligand for enantioselective epoxidation [J].

Angelino, MD ;

Laibinis, PE .

MACROMOLECULES, 1998, 31 (22) :7581-7587

[2] Remarkable matrix effect in polymer-supported Jacobsen's alkene epoxidation catalysts [J].

Canali, L ;

Cowan, E ;

Deleuze, H ;

Gibson, CL ;

Sherrington, DC .

CHEMICAL COMMUNICATIONS, 1998, (23) :2561-2562

[3] Epoxidations of olefins catalysed by new Mn(II) salen immobilized mesoporous materials [J].

Choudary, BM ;

Kantam, ML ;

Bharathi, B ;

Sreekanth, P ;

Figueras, F .

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2000, 159 (02) :417-421

[4]

DE BB, 1995, TETRAHEDRON-ASYMMETR, V6, P2105

[5] CATALYTIC ASYMMETRIC EPOXIDATION OF UNFUNCTIONALIZED OLEFINS [J].

IRIE, R ;

NODA, K ;

ITO, Y ;

MATSUMOTO, N ;

KATSUKI, T .

TETRAHEDRON LETTERS, 1990, 31 (50) :7345-7348

[6]

JACOBSEN EN, 1999, COMPREHENSIVE ASYMME, V2, P723

[7]

JHAN W, 1990, J AM CHEM SOC, V112, P2801

[8]

Kantam ML, 1999, SYNLETT, P1413

[9] The catalytic activity of new chiral salen complexes immobilized on MCM-41 by multi-step grafting in the asymmetric epoxidation [J].

Kim, GJ ;

Shin, JH .

TETRAHEDRON LETTERS, 1999, 40 (37) :6827-6830

[10] ASYMMETRIC HYDROGENATION OF ALPHA-(ACETYLAMINO)CINNAMIC ACID WITH A NOVEL RHODIUM COMPLEX - THE DESIGN OF AN OPTIMAL LIGAND [J].

NAGEL, U .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH, 1984, 23 (06) :435-436

← 1 2 →