Reaction of arylsulfonyl compounds with excess organolithium reagent 10. Opening of the thiophene ring in?-lithium derivatives of 2,5-bis(tert-butylsulfonyl)thiophene

1977 ◽  
Vol 26 (6) ◽  
pp. 1262-1265
Author(s):  
F. M. Stoyanovich ◽  
G. B. Chermanova ◽  
Ya. L. Gol'dfarb
Keyword(s):  
Thiophene Ring ◽  
Derivatives Of ◽  
Organolithium Reagent

Vitamin D relatives. Part I. B-thiophene-des-A-cholestanes. Solvolytic reactions of some derivatives of 2,2-disubstituted cyclohexane-1,4-diol and 4-hydroxycyclohexan-1-one

1986 ◽  
Vol 64 (8) ◽  
pp. 1536-1539 ◽  
Author(s):  
Jacek W. Morzycki
Keyword(s):  
Vitamin D ◽  
Thiophene Ring ◽  
Derivatives Of

Some derivatives of des-A-cholestane with a thiophene ring B have been prepared from triketone 2. The reactions of tosylates of C-10 alcohols (7b, 9b, and 8c) leading to A-ring ethers (10 and 11) and olefin 5, respectively, have been studied. The solvolysis of tosylate 4c and the Bamford–Stevens reactions of p-tosylhydrazones 3c and 13b are also discussed.

scholarly journals In VirtoAntioxidant Activities of New 4,5-Dihydro-1H,2,4-triazol-5-ones having Thiophene Ring with their Acidic Properties

2011 ◽  
Vol 8 (4) ◽  
pp. 1734-1746 ◽  
Author(s):  
H. Yuksek ◽  
F. Islamoglu ◽  
O. Gursoy Kol ◽  
S. Bahceci ◽  
M. Bekar ◽  
...  
Keyword(s):  
Isopropyl Alcohol ◽  
Antioxidant Activities ◽  
Thiophene Ring ◽  
Butyl Alcohol ◽  
Dimethyl Formamide ◽  
Acidic Properties ◽  
Alkyl Aryl ◽  
Neutralization Potential ◽  
New Compounds ◽  
Derivatives Of

Seven new 3-alkyl(aryl)-4-(2-thienymethylenamino)-4,5-dihydro-1H-1,2,4-triazol-5-ones(2)were synthesized by the reactions of 3-alkyl(aryl)-4-amino-4,5-dihydro-1H-1,2,4-triazol-5-ones(1)with thiophene-2-carbaldehyde. In addition,N-acetyl derivatives of compounds2d-2gwere also prepared. The structures of eleven new compounds synthesized were determined by elemental analysis as well as IR, NMR and UV spectral data. In addition, compounds2a-gand3a,3b,3d-fwere also screened for their antioxidant activities and2a-gwere potentiometrically titrated with tetrabutylammonium hydroxide (TBAH) in four nonaqueous solvents (isopropyl alcohol,t-butyl alcohol, acetonitrile andN,N-dimethyl formamide). Also half-neutralization potential values and the corresponding pKa values were determined in all cases.

scholarly journals A simple and easy to perform synthetic route to functionalized thienyl bicyclo[3.2.1]octadienes

2020 ◽  
Vol 16 ◽  
pp. 1092-1099
Author(s):  
Dragana Vuk ◽  
Irena Škorić ◽  
Valentina Milašinović ◽  
Krešimir Molčanov ◽  
Željko Marinić
Keyword(s):  
Aldol Condensation ◽  
Thiophene Ring ◽  
Aldol Reaction ◽  
Synthetic Route ◽  
Condensation Reactions ◽  
Thiophene Derivatives ◽  
Wittig Reactions ◽  
Aldol Condensation Reactions ◽  
Derivatives Of

In order to prepare novel polycyclic derivatives of bicyclo[3.2.1]octadiene systems fused with a thiophene ring, photochemical cyclization and aldol condensation reactions were carried out. The starting substrates were easily obtained by a Vilsmeier–Haack reaction of bicyclo[3.2.1]octadiene thiophene derivatives with dimethylformamide. From the obtained carbaldehydes, novel methyl, methoxy, and cyano-substituted styryl thienobenzobicyclo[3.2.1]octadiene derivatives were synthesized through Wittig reactions and subjected to photochemical cyclization, in terms of obtaining the new annulated structures. As part of this study, the aldol reaction of the starting 2-substituted carbaldehyde with acetone was also performed, which produced the thieno-fused benzobicyclo[3.2.1]octadiene compound with an extended conjugation.

Physical Properties of TCNQ Salts with N-Methyl Derivatives of Pyridine

1982 ◽  
Vol 85 (1) ◽  
pp. 257-263 ◽  
Author(s):  
A. Graja ◽  
M. Przybylski ◽  
B. Butka ◽  
R. Swietlik
Keyword(s):  
Physical Properties ◽  
Methyl Derivatives ◽  
Derivatives Of
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