Synthesis of DL-threo- and DL-erythro-β-hydroxyisoleucine

DL-threo- and DL-erythro-β-Hydroxyisoleucine were prepared from cis- and trans-3-methylpent-2-enoic acids, respectively. The configuration of the erythro isomer was established from its synthesis by two independent routes. The diastereoisomers, and those of other β-hydroxy amino acids, can be distinguished by examination of their proton magnetic resonance spectra.

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The preparation of 2-Fluoro-5-nitrobenzonitrile and the proton magnetic resonance spectra of some compounds containing the N-(2-Cyano-4-nitrophenyl) group

Australian Journal of Chemistry ◽

10.1071/ch9671663 ◽

1967 ◽

Vol 20 (8) ◽

pp. 1663 ◽

Cited By ~ 5

Author(s):

JFK Wilshire

Keyword(s):

Amino Acids ◽

Magnetic Resonance ◽

Nitro Group ◽

Proton Magnetic Resonance ◽

Cyano Group ◽

Aromatic Nucleus ◽

Heteroaromatic Compounds ◽

Magnetic Resonance Spectra

2-Fluoro-5-nitrobenzonitrile, an analogue of 1-fluoro-2,4- dinitrobenzene, in which the 2-nitro group has been replaced by a cyano group, has been prepared and made to react with several amines, amino acids, and NH-heteroaromatic compounds. The proton magnetic resonance spectra of some of the resultant N-(2-cyano-4-nitrophenyl) derivatives were compared with the spectra of the corresponding N-(2,4- dinitrophenyl) derivatives and furnish further evidence that the ortho nitro group of the latter derivatives is rotated out of the plane of the aromatic nucleus.

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The use of proton magnetic resonance spectra in the identification of 1′,2′-cis- and trans-furanosyl nucleosides

Carbohydrate Research ◽

10.1016/s0008-6215(00)82952-3 ◽

1974 ◽

Vol 33 (1) ◽

pp. 184-187 ◽

Cited By ~ 20

Author(s):

John A. Montgomery

Keyword(s):

Magnetic Resonance ◽

Proton Magnetic Resonance ◽

Cis And Trans ◽

Magnetic Resonance Spectra

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Proton magnetic resonance spectra of amino-acids and peptides relevant to wool structure. Part VI. Relative residence times of peptides of histidine, tryptophan, and valine

Journal of the Chemical Society Perkin Transactions 2 ◽

10.1039/p29760001190 ◽

1976 ◽

pp. 1190 ◽

Cited By ~ 6

Author(s):

Brian J. Dale ◽

Derry W. Jones

Keyword(s):

Amino Acids ◽

Magnetic Resonance ◽

Proton Magnetic Resonance ◽

Residence Times ◽

Magnetic Resonance Spectra

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Proton magnetic resonance spectra of platinum(II) complexes. II. cis- and trans- bis(dialkyl sulfide)dichloroplatinum(II) complexes. Mechanism of inversion at sulfur and vicinal platinum-proton couplings

Journal of the American Chemical Society ◽

10.1021/ja00994a009 ◽

1967 ◽

Vol 89 (18) ◽

pp. 4617-4621 ◽

Cited By ~ 49

Author(s):

Patricia C. Turley ◽

Paul. Haake

Keyword(s):

Magnetic Resonance ◽

Proton Magnetic Resonance ◽

Dialkyl Sulfide ◽

Cis And Trans ◽

Magnetic Resonance Spectra

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THE PROTON MAGNETIC RESONANCE SPECTRA OF CHRYSANTHEMUM ETHYL ESTER AND THE RELATED cis- AND trans-CHRYSANTHEMUMIC ACIDS

Canadian Journal of Chemistry ◽

10.1139/v62-133 ◽

1962 ◽

Vol 40 (5) ◽

pp. 875-881 ◽

Cited By ~ 36

Author(s):

H. M. Hutton ◽

T. Schaefer

Keyword(s):

Magnetic Resonance ◽

Ethyl Ester ◽

Proton Magnetic Resonance ◽

Acid Ethyl Ester ◽

Proton Spin ◽

Coupling Constants ◽

Spin Coupling ◽

Cis And Trans Isomers ◽

Cis And Trans ◽

Magnetic Resonance Spectra

The high-resolution proton magnetic resonance spectra of a mixture of the cis and trans isomers of chrysanthemum monocarboxylic acid ethyl ester have been studied. The cis-chrysanthemumic and trans-chrysanthemumic acids spectra were obtained to facilitate the interpretation of the complex spectra of the ester. The percentage of the trans isomer in the chrysanthemum ester was measured to be 62.0 ± 1.1%. The cyclopropane proton spin coupling constants were found to be Jcis = 8.7 c.p.s. and Jtrans = 5.4 c.p.s., in reasonable agreement with Karplus' calculations of the dependence of coupling constants on the dihedral angle.

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