Lignans of western red cedar (Thuja plicata Donn). VI. Dihydroxythujaplicatin methyl ether

1967 ◽  
Vol 45 (3) ◽  
pp. 305-309 ◽  
Author(s):  
Harold MacLean ◽  
Koji Murakami
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Methyl Ether ◽  
Degradation Products ◽  
Parent Compound ◽  
Thuja Plicata ◽  
Red Cedar ◽  
Magnetic Resonance Data ◽  
Resonance Data ◽  
Thuja Plicata Donn

Proof of structure is presented for another lignan of the thujaplicatin series, 2,3-dihydroxy-2-(4″-hydroxy-3″,5″-dimethoxybenzyl)-3-(4′-hydroxy-3′-methoxybenzyl)-butyrolactone (I) (dihydroxythujaplicatin methyl ether). Analytical and spectral (ultraviolet, infrared, and nuclear magnetic resonance) data on derivatives and degradation products, in addition to the parent compound, are presented.

Chromous Chloride Reduction. VIII. Reaction of Some Derivatives and Degradation Products of Heptachlor with Chromous Chloride-Ethylenediamine Complex and Nuclear Magnetic Resonance and Mass Spectra of the Products

1974 ◽  
Vol 57 (1) ◽  
pp. 205-216
Author(s):  
Alfred S Y Chau ◽  
Adrian Demayo ◽  
John W Apsimon ◽  
John A Buccini ◽  
Alain Fruchier
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Mass Spectra ◽  
Degradation Products ◽  
Magnetic Resonance Data ◽  
Resonance Data ◽  
Ethylenediamine Complex ◽  
Confirmatory Tests ◽  
Chromous Chloride ◽  
Nuclear Magnetic

Abstract The use of the chromous chloride-ethylenediamine (CrCl2-en) complex to speed dechlorination and minimize side-products has been explored for heptachlor metabolites and degradation products. Five pentachloro heptachlor derivatives are synthesized, and their nuclear magnetic resonance and mass spectra are presented and discussed. Nuclear magnetic resonance data support the anti assignment of H- in the major products from CrCl2-en reduction of cyclodiene pesticides. The use of this reagent for possible development of chemical confirmatory tests for heptachlor metabolites and degradation products is also briefly discussed.

LIGNANS OF WESTERN RED CEDAR (THUJA PLICATA DONN): V. HYDROXYTHUJAPLICATIN METHYL ETHER

1966 ◽  
Vol 44 (15) ◽  
pp. 1827-1830 ◽  
Author(s):  
Harold MacLean ◽  
Koji Murakami
Keyword(s):  
Methyl Ether ◽  
Parent Compound ◽  
Analytical Data ◽  
Hot Water ◽  
Spectral Studies ◽  
Thuja Plicata ◽  
The Third ◽  
Red Cedar ◽  
Western Red Cedar ◽  
Thuja Plicata Donn

The structure of another guaiacyl–syringyl type lignan, which was previously separated from the hot-water extractive of western red cedar (Thujaplicata Donn), has now been determined as 2-hydroxy-2-(4″-hydroxy-3″,5″-dimethoxybenzyl)-3-(4′-hydroxy-3′-methoxybenzyl)-butyrolactone (III). This lignan is the third member of the thujaplicatin series and has been given the name of hydroxythujaplicatin methyl ether. Analytical data and degradational and spectral studies of the parent compound and its methylated derivatives are presented as proof of structure.

Methods to Determine Phytopharmaceuticals in Tobacco and Tobacco Products. 4th Report: A Procedure to Determine Vamidothion and its Metabolites/Methoden zur Bestimmung von Phytopharmaka in Tabak und Tabakerzeugnissen: IV. Mitteilung: Ein Bestimmungsverfahren fuer Vamidothion und seine Metaboliten

1977 ◽  
Vol 9 (2) ◽  
Author(s):  
A.N. Sagredos ◽  
R. Moser
Keyword(s):  
Mass Spectrometry ◽  
Nuclear Magnetic Resonance ◽  
Acetic Acid ◽  
Magnetic Resonance ◽  
Aluminium Oxide ◽  
Nuclear Magnetic Resonance Data ◽  
Gas Chromatograph ◽  
Tobacco Products ◽  
Magnetic Resonance Data ◽  
Resonance Data

AbstractBased on previous work (7) a method to simultaneously determine vamidothion [I], vamidothion-sulfoxide [II] and vamidothion sulfone [III] in tobacco has been developed. The compounds are extracted with water/acetone/acetic acid from the tobacco, cleansed over an aluminium oxide column and then determined on the gas chromatograph with the specific sulphur detector. Rates of recovery are 70 % - 92 %, the determination level is 0.1 ppm. Mass spectrometry and nuclear magnetic resonance data of vamidothion [I], vamidothion-sulfoxide [ II ] and vamidothion-sulfone [III] are given.

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