Sulfur heterocycles. 3. Heterogeneous, phase-transfer, and acid-catalyzed potassium permanganate oxidation of sulfides to sulfones and a survey of their carbon-13 nuclear magnetic resonance spectra

1980 ◽  
Vol 45 (18) ◽  
pp. 3634-3639 ◽  
Author(s):  
George W. Gokel ◽  
Harold M. Gerdes ◽  
Dennis M. Dishong
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Potassium Permanganate ◽  
Phase Transfer ◽  
Permanganate Oxidation ◽  
Oxidation Of Sulfides ◽  
Nuclear Magnetic Resonance Spectra ◽  
Sulfur Heterocycles ◽  
Acid Catalyzed ◽  
Heterogeneous Phase

Reaction of glyoxal at the ortho position of phenols. Synthesis of 5a,10b-dihydrobenzofuro[2,3-b]benzofurans and 2-(3-benzofuranyl)phenols

1967 ◽  
Vol 45 (15) ◽  
pp. 1777-1784 ◽  
Author(s):  
E. C. M. Coxworth
Keyword(s):  
Molecular Weight ◽  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Ortho Position ◽  
Acidic Media ◽  
Nuclear Magnetic Resonance Spectra ◽  
Acid Catalyzed ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

The acid-catalyzed reaction of glyoxal at the ortho position of phenols has been shown to yield, as initial products, substituted 5a,10b-dihydrobenzofuro[2,3-b]benzofurans, such structures being indicated by the nuclear magnetic resonance spectra, and confirmed in several cases by synthesis via an unambiguous route. At higher temperatures in acidic media, and in the absence of glyoxal, these initial products were converted into the corresponding 2-(3-benzofuranyl)phenols. When glyoxal was present in acidic media, the 2-(3-benzofuranyl)phenols reacted further to give unidentified products of appreciably higher molecular weight.

scholarly journals A New Brominated Norsesquiterpene Glycoside From the Rhizomes of Acorus tatarinowii Schott

2021 ◽  
Vol 16 (2) ◽  
pp. 1934578X2199226
Author(s):  
Zhi-You Hao ◽  
Gang Ni ◽  
Dong Liang ◽  
Yan-Fei Liu ◽  
Chun-Lei Zhang ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Pc12 Cells ◽  
Absolute Configuration ◽  
Glucose Deprivation ◽  
Oxygen Glucose Deprivation ◽  
In Vitro Tests ◽  
Nuclear Magnetic Resonance Spectra ◽  
Acorus Tatarinowii

A new brominated norsesquiterpene glycoside, acoruside (1), has been isolated from the rhizomes of Acorus tatarinowii Schott, together with 8 known compounds (2-9). Their structures were elucidated mainly based on 1-dimensional (1D) and 2D nuclear magnetic resonance spectra. The absolute configuration of compound 1 was determined by comparing its experimental and calculated electronic circular dichroism spectra. The in vitro tests indicated that at 10 µM, compounds 2, 3, and 4 aggravated serum deprivation injuries of PC12 cells, compound 2 aggravated rotenone-induced injuries of PC12 cells, and compounds 3 and 4 aggravated the oxygen-glucose deprivation-induced injuries of PC12 cells.

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