Enantiodifferentiation in asymmetric sonochemical hydrogenations

被引：103

作者：

Torok, B

Felfoldi, K

Szakonyi, G

Balazsik, K

Bartok, M

机构：

[1] Attila Jozsef Univ, Hungarian Acad Sci, Organ Catalysis Res Grp, H-6720 Szeged, Hungary

[2] Attila Jozsef Univ, Dept Organ Chem, H-6720 Szeged, Hungary

[3] Albert Szent Gyorgyi Med Univ, Dept Biochem, H-6701 Szeged, Hungary

来源：

CATALYSIS LETTERS | 1998年 / 52卷 / 1-2期

关键词：

hydrogenation; enantioselective; Pt/Al2O3; cinchonidine; ethyl pyruvate; ultrasounds; particle size distribution;

D O I：

10.1023/A:1019098731600

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：

The effect of sonochemical pretreatment on the enantioselectivity of Pt/Al2O3-cinchonidine-catalyzed ethyl pyruvate hydrogenation was studied at different hydrogen pressures in various solvents, mainly in acetic acid. The sonochemical pretreatment of a commercial Pt/Al2O3-cinchonidine catalytic system in acetic acid resulted in enhanced enantioselectivity providing excellent ee values (97% ee) under mild and widely varied experimental conditions. Moreover, the application of ultrasonics provides a possibility of the catalyst recycling without regeneration. The catalyst was tested by transmission electron microscopy to determine the effect of the sonication on the metal particle size morphology.

引用

页码：81 / 84

页数：4

共 31 条

[1] [Anonymous], 1995, CHIRAL REACTIONS HET
[2] ENANTIOSELECTIVE HETEROGENEOUS CATALYSIS .1. A WORKING MODEL FOR THE CATALYST-MODIFIER-SUBSTRATE INTERACTIONS IN CHIRAL PYRUVATE HYDROGENATIONS
AUGUSTINE, RL
TANIELYAN, SK
DOYLE, LK
[J]. TETRAHEDRON-ASYMMETRY, 1993, 4 (08) : 1803 - 1827
[3] Progress in asymmetric heterogeneous catalysis: Design of novel chirally modified platinum metal catalysts
Baiker, A
[J]. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 1997, 115 (03) : 473 - 493
[4] BAIKER A, 1997, HDB HETEROGENEOUS CA, V5, P2422
[5] BARTOK M, 1985, STEREOCHEMISTRY HETE, P511
[6] INFLUENCE OF ULTRASOUND ON THE PREPARATION OF RUTHENIUM CATALYSTS SUPPORTED ON ALUMINA
BIANCHI, CL
CARLI, R
LANZANI, S
LORENZETTI, D
VERGANI, G
RAGAINI, V
[J]. ULTRASONICS SONOCHEMISTRY, 1994, 1 (01) : S47 - S49
[7] ENANTIOSELECTIVE HYDROGENATION OF ALPHA-KETOESTERS WITH CINCHONA-MODIFIED PLATINUM CATALYSTS - EFFECT OF ACIDIC AND BASIC SOLVENTS AND ADDITIVES
BLASER, HU
JALETT, HP
WIEHL, J
[J]. JOURNAL OF MOLECULAR CATALYSIS, 1991, 68 (02): : 215 - 222
[8] BLASER HU, 1991, STUD SURF SCI CATAL, V67, P147, DOI 10.1016/S0167-2991(08)61934-5
[9] BLASER HU, 1991, STUD SURF SCI CATAL, V59, P73
[10] Enantioselective hydrogenation of alpha-ketoesters: Comparison of homogeneous and heterogeneous catalysts
Blaser, HU
Jalett, HP
Spindler, F
[J]. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 1996, 107 (1-3) : 85 - 94

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