DICP OpenIR
Asymmetric epoxidation of 6-cyano-2,2-dimethylchromene on Mn(salen) catalyst immobilized in mesoporous materials
Zhang, H; Li, C
KeywordHeterogeneous Chiral Catalysis Asymmetric Epoxidation Mn(Salen) Confinement Effect Nanopore Enantioselective
Source PublicationTETRAHEDRON
2006-07-12
DOI10.1016/j.tet.2006.01.117
Volume62Issue:28Pages:6640-6649
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectChemistry, Organic
WOS Research AreaChemistry
WOS KeywordHETEROGENEOUS ENANTIOSELECTIVE CATALYST ; SCHIFF-BASE COMPLEX ; SALEN COMPLEXES ; UNFUNCTIONALIZED OLEFINS ; NONFUNCTIONALIZED ALKENES ; HYDROGEN-PEROXIDE ; CHIRAL CATALYSTS ; POROUS MATERIALS ; ZEOLITE-Y ; MCM-41
AbstractThis article reports our recent work on the heterogeneous asymmetric epoxidation catalyzed by chiral Mn(salen) catalyst axially immobilized via phenoxyl groups and organic sulfonic groups. The asymmetric epoxidation of 6-cyano-2,2-dimethylchromene was especially presented in detail. The factors that affected the asymmetric induction, such as the nanopores and the external surface, the linkage length, and the modification of nanopores with methyl groups were discussed. It was found that the enantioselectivities increased with decreasing the nanopore sizes or increasing the linkage length in nanopore, and the Mn(salen) catalyst immobilized into nanopores generally gave higher ee values than those on the external surface. The heterogeneous Mn(salen) catalysts with modified nanopores gave a TOF of 14.8 h(-1) and an ee value of 90.6% for the asymmetric epoxidation of 6-eyano-2,2-dimethylchromene, which were higher than the results (TOF 10.8 h(-1), ee 80.1%) obtained for the homogeneous catalyst. (c) 2006 Elsevier Ltd. All rights reserved.
Language英语
WOS IDWOS:000238643500006
Citation statistics
Cited Times:75[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/139972
Collection中国科学院大连化学物理研究所
AffiliationChinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
Recommended Citation
GB/T 7714
Zhang, H,Li, C. Asymmetric epoxidation of 6-cyano-2,2-dimethylchromene on Mn(salen) catalyst immobilized in mesoporous materials[J]. TETRAHEDRON,2006,62(28):6640-6649.
APA Zhang, H,&Li, C.(2006).Asymmetric epoxidation of 6-cyano-2,2-dimethylchromene on Mn(salen) catalyst immobilized in mesoporous materials.TETRAHEDRON,62(28),6640-6649.
MLA Zhang, H,et al."Asymmetric epoxidation of 6-cyano-2,2-dimethylchromene on Mn(salen) catalyst immobilized in mesoporous materials".TETRAHEDRON 62.28(2006):6640-6649.
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