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| 21. |
C2‐Symmetric 4,4′,5,5′‐Tetrahydrobi(oxazoles) and 4,4′,5,5′‐Tetrahydro‐2,2′‐methylenebis[oxazoles] as Chiral Ligands for Enantioselective Catalysis Preliminary Communication |
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Helvetica Chimica Acta,
Volume 74,
Issue 1,
1991,
Page 232-240
Dieter Müller,
Gisela Umbricht,
Beat Weber,
Andreas Pfaltz,
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摘要:
AbstractThe synthesis of a series of enantiomerically pure,C2‐symmetric 4,4′,5,5′‐tetrahydro‐2,2′‐methylenebis[oxazoles] and 4,4′,5,5′‐tetrahydro‐2,2′‐bi(oxazoles) is reported. Copper complexes with anionic tetrahydromethylenebis[oxazole]ligands are efficient catalysts for the enantioselective cyclopropane formation from olefins and diazo compounds (up to 96% ee in the reaction of styrene with menthyl diazoacetate). Tetrahydrobi(oxazole)iridium(I) complexes were found to catalyze transfer hydrogenations of aryl alkyl ketones with i‐PrOH (up to 91% ee). Tetrahydrobi(oxazole)palladium complexes can be used as enantioselective catalysts for allylic nucleophilic substitution (up to 77% ee in the reaction of PhCHC
ISSN:0018-019X
DOI:10.1002/hlca.19910740123
出版商:WILEY‐VCH Verlag GmbH
年代:1991
数据来源: WILEY
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| 22. |
Mitteilungen |
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Helvetica Chimica Acta,
Volume 74,
Issue 1,
1991,
Page 241-244
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ISSN:0018-019X
DOI:10.1002/hlca.19910740124
出版商:WILEY‐VCH Verlag GmbH
年代:1991
数据来源: WILEY
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| 23. |
Masthead |
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Helvetica Chimica Acta,
Volume 74,
Issue 1,
1991,
Page -
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PDF (29KB)
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ISSN:0018-019X
DOI:10.1002/hlca.19910740101
出版商:WILEY‐VCH Verlag GmbH
年代:1991
数据来源: WILEY
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Volume 74 issue 1