scholarly journals XCIII.—The chlorine derivatives of pyridine. Part VII. Some condensation products

1901 ◽  
Vol 79 (0) ◽  
pp. 899-905 ◽  
Author(s):  
W. J. Sell ◽  
F. W. Dootson
Keyword(s):  
Condensation Products ◽  
Derivatives Of

Synthetic studies of hydrazine and guanidine: derivatives of 5-pyrazoles

1968 ◽  
Vol 46 (7) ◽  
pp. 1079-1091 ◽  
Author(s):  
Joseph Zauhar ◽  
Benoit F. Ladouceur
Keyword(s):  
Hydrazine Hydrate ◽  
Dimethyl Formamide ◽  
Condensation Products ◽  
Guanidine Derivatives ◽  
Synthetic Studies ◽  
Derivatives Of ◽  
Related Compounds ◽  
Reaction Schemes

The reactions of several substituted 5-chloropyrazoles with hydrazine hydrate and guanidine, respectively, were investigated in ethanol and dimethyl formamide media. In certain cases, only SN2 reactions occurred, while in others the 5-hydrazino- and 5-guanidopyrazoles reacted still further to yield related compounds with two pyrazole rings. On the basis of the intermediates and the different condensation products isolated, reaction schemes are proposed for the reactions discussed.

Use of malonic acid derivatives for the construction of substituted side chains in the position 17β of steroids

1982 ◽  
Vol 47 (4) ◽  
pp. 1240-1251 ◽  
Author(s):  
Pavel Drašar ◽  
Vladimír Pouzar ◽  
Ivan Černý ◽  
Miroslav Havel ◽  
Sofia N. Ananchenko ◽  
...  
Keyword(s):  
Malonic Acid ◽  
Ethyl Cyanoacetate ◽  
Diethyl Malonate ◽  
Side Chain ◽  
Knoevenagel Reaction ◽  
Side Chains ◽  
Condensation Products ◽  
Malonic Acid Derivatives ◽  
Derivatives Of ◽  
Dioxane Ring

Using the Knoevenagel reaction condensation products of 3β-acetoxyandrost-5-en-17-one with diethyl malonate, ethyl cyanoacetate and malononitrile were prepared which converted to derivatives of 3β-hydroxypregn-5-en-21-oic acid. Reductions and oxidations of the double bonds in the positions 5,6 and 17,20 and the stereochemistry at atoms C(17) and C(20) of some derivatives were also investigated. From derivatives of 23,24-dinorchola-5,17(20)-diene-21,22-diol compounds with a 1,3-dioxane ring in the side chain were prepared.

Comparative Structural Characterization of the Biquaternized N-CH3 and N-BH3 Derivatives of the cis-Cyclen and cis-Cyclam Condensation Products with Glyoxal

Tetrahedron ◽  
2000 ◽  
Vol 56 (35) ◽  
pp. 6427-6433 ◽  
Author(s):  
Susana Rojas-Lima ◽  
Norberto Farfán ◽  
Rosa Santillan ◽  
Dolores Castillo ◽  
Martha E. Sosa-Torres ◽  
...  
Keyword(s):  
Structural Characterization ◽  
Condensation Products ◽  
Comparative Structural Characterization ◽  
Derivatives Of

scholarly journals Naturally Occurring Limonene to Cinnamyl-type γ-Butyrolactone Substituted Aldol Condensation Derivatives as Antioxidant Compounds

2012 ◽  
Vol 7 (9) ◽  
pp. 1934578X1200700
Author(s):  
Pushpinder Kaur ◽  
Pralay Das ◽  
Abha Chaudhary ◽  
Bikram Singh
Keyword(s):  
Antioxidant Activity ◽  
Benzene Ring ◽  
Aldol Condensation ◽  
Antioxidant Compounds ◽  
Condensation Products ◽  
Naturally Occurring ◽  
Derivatives Of

A method has been developed for the synthesis of γ-butyrolactone substituted cinnamyl type Aldol condensation products under milder proline and triethylamine basic conditions. The antioxidant activity of all the synthesized compounds was assessed using three different assays. The cinnamyl type derivatives of γ-butyrolactone bearing an -OH group in the benzene ring exhibited excellent antioxidant activity.

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