The yellow pigments of Beauveria species. Structures of tenellin and bassianin

1977 ◽  
Vol 55 (23) ◽  
pp. 4090-4098 ◽  
Author(s):  
Chi-Kit Wat ◽  
A. Gavin Mcinnes ◽  
Donald G. Smith ◽  
Jeffrey L. C. Wright ◽  
Leo C. Vining
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Spin Coupling ◽  
Spectroscopic Evidence ◽  
Nuclear Magnetic Resonance Spectra ◽  
N Isotopes ◽  
Yellow Pigments ◽  
Spin Spin Coupling ◽  
Derivatives Of ◽  
Magnetic Resonance Spectra

Tenellin and bassianin are deduced from chemical and spectroscopic evidence to be the 3-[(E,E)-4,6-dimethylocta-2,4-dienoyl] and 3-[(E,E,E)-6,8-dimethyldeca-2,4,6-trienoyl] derivatives of 1,4-dihydroxy-5-(p-hydroxyphenyl)-2(1H)-pyridone. Spin–spin coupling information in the 1H and 13C nuclear magnetic resonance spectra after biosynthetic enrichment of tenellin with 13C and 15N isotopes was a valuable aid in elucidating the structure.

ORGANIC AND BIOLOGICAL SPECTROCHEMICAL STUDIES: XXII. THE INFRARED, ULTRAVIOLET, AND NUCLEAR MAGNETIC RESONANCE SPECTRA OF SOME SUBSTITUTED 2-INDANONES AND REFERENCE COMPOUNDS

1966 ◽  
Vol 44 (7) ◽  
pp. 759-769 ◽  
Author(s):  
Emil J. Moriconi ◽  
John P. St. George ◽  
W. F. Forbes
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Infrared Region ◽  
Spin Coupling ◽  
Nuclear Magnetic Resonance Spectra ◽  
Two Peaks ◽  
Spin Spin Coupling ◽  
Infrared Data ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

Infrared, ultraviolet, and nuclear magnetic resonance spectra of the following compounds are reported: 2-indanone (I), trans- and cis-hexahydro-2-indanone (V and XI), 1-chloro-2-indanone-1,3,3-d3 (III), 1-bromo-2-indanone-1,3,3-d3 (IV), 1-chloro-trans-hexahydro-2-indanone (VII), 1-bromo-trans-hexahydro-2-indanone (VIII), some deuterated forms of these compounds, 2-chlorocyclohexanone-2,6,6-d3, and 2-bromocyclohexanone-2,6,6-d3.2-Indanone and trans-hexahydro-2-indanone each display two peaks in the carbonyl infrared region with intensity ratios of approximately 40:1. The origin of these doublets is discussed.Nuclear magnetic resonance spectra were determined to indicate the presence or absence of ring mobility, and spin–spin coupling data were used to support some of the conclusions deduced from the infrared data for some of the compounds.

Nuclear magnetic resonance spectra of some aryl derivatives of mercury

1971 ◽  
Vol 24 (2) ◽  
pp. 317 ◽  
Author(s):  
PJ Banney ◽  
PR Wells
Keyword(s):  
Magnetic Resonance ◽  
Proton Magnetic Resonance ◽  
Proton Spin ◽  
Spin Coupling ◽  
Methyl Groups ◽  
Conformational Effects ◽  
Nuclear Magnetic Resonance Spectra ◽  
Spin Spin Coupling ◽  
Derivatives Of ◽  
Magnetic Resonance Spectra

The proton magnetic resonance spectra of a series of arylmercury chlorides containing methyl groups or a single polar substituent have been determined paying particular attention to mercury-proton spin-spin coupling. This is readily observed for protons or methyl groups ortho or meta to mercury but rarely for the para derivatives. The ortho coupling is relatively insensitive to structure whereas the meta coupling shows considerable variations that appear to be associated with conformational effects.

(13C,2H) residual dipolar and indirect spin–spin coupling effects in high-resolution13C nuclear magnetic resonance spectra of solids

1993 ◽  
Vol 89 (20) ◽  
pp. 3791-3796 ◽  
Author(s):  
Abil E. Aliev ◽  
Kenneth D. M. Harris ◽  
David C. Apperley ◽  
Robin K. Harris ◽  
M. Maral Sünnetçioğlu
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Spin Coupling ◽  
Coupling Effects ◽  
Nuclear Magnetic Resonance Spectra ◽  
Spin Spin Coupling ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

Studies of specifically fluoridated carbohydrates. Part V. Derivatives of 3,6-anhydro-5-deoxy-5-fluoro-1,2-O-isopropylidene-α-L-idofuraeose

1970 ◽  
Vol 48 (3) ◽  
pp. 451-458 ◽  
Author(s):  
L. D. Hall ◽  
P. R. Steiner
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Spin Coupling ◽  
Facile Synthesis ◽  
Nuclear Magnetic Resonance Spectra ◽  
Derivatives Of ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

The facile synthesis of 3,6-anhydro-5-deoxy-5-fluoro-1,2-O-isopropylidene-α-L-idofuranose (4) from readily available precursors is described. The 1H and 19F nuclear magnetic resonance spectra of this derivative have been analyzed. Interestingly, the fluorine substituent exhibits detectable spin coupling with all ring protons except H-2. Both of the anomeric 1,2-di-O-acetyl derivatives of (4) have also been studied.

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