scholarly journals The Effect of Pressure on the Acid Hydrolysis of Ethyl Acetate, Diethoxymethane, and t-Butyl Acetate in Aqueous Dioxane

1969 ◽  
Vol 90 (10) ◽  
pp. 1016-1020 ◽  
Author(s):  
Hidenori Itsuki ◽  
Bun-ichi Matsuda ◽  
Seiji Terasawa
Keyword(s):  
Ethyl Acetate ◽  
Acid Hydrolysis ◽  
Butyl Acetate ◽  
Aqueous Dioxane ◽  
Effect Of Pressure ◽  
Hydrolysis Of

scholarly journals HPTLC determination of diosgenin in fenugreek seeds

2018 ◽  
Vol 68 (1) ◽  
pp. 97-107 ◽  
Author(s):  
Barbara Król-Kogus ◽  
Khenifi Mohammed Lamine ◽  
Piotr Migas ◽  
Messaoud Boudjeniba ◽  
Mirosława Krauze-Baranowska
Keyword(s):  
Ethyl Acetate ◽  
Acid Hydrolysis ◽  
Methanolic Extract ◽  
Soxhlet Extraction ◽  
African Origin ◽  
Fenugreek Seeds ◽  
Hydrolysis Products ◽  
Hydrolysis Of

Abstract A new HPTLC-densitometric method for diosgenin determination in fenugreek seeds was established after optimization of the conditions for efficient saponin extraction and acid hydrolysis. Several procedures were tested, the best of which was a three-step Soxhlet extraction, followed by hydrolysis of the obtained methanolic extract with 2 mol L-1 H2SO4. Best diosgenin separation from other hydrolysis products was obtained on HPTLC Si60F254 plates u sing a mixture of n-heptane/ethyl acetate (7:3, V/V) and modified anisaldehyde as a spraying reagent. The method was preliminarily validated and the determined amounts of diosgenin in fenugreek seeds of Polish and African origin were found to be similar and ranged from 0.12-0.18 %.

scholarly journals The Effect of Pressure on the Acid Hydrolysis of N-t-Butylacetamide

1969 ◽  
Vol 90 (11) ◽  
pp. 1119-1122
Author(s):  
Hidenori Itsuki ◽  
Seiji Terasawa
Keyword(s):  
Acid Hydrolysis ◽  
Effect Of Pressure ◽  
Hydrolysis Of

On the Acid Hydrolysis of Ethyl Acetate in Methanol-Water Mixtures

1958 ◽  
Vol 17 (1_2) ◽  
pp. 21-29 ◽  
Author(s):  
Hussein Sadek ◽  
Mohammed Ismail Abdel Latif
Keyword(s):  
Ethyl Acetate ◽  
Acid Hydrolysis ◽  
Hydrolysis Of

scholarly journals The Influcence of the Solvent on Reaction Velocity. XXIV. The Acid Hydrolysis of Ethyl Acetate in Dimethyl Sulphoxide-Water Mixtures.

1963 ◽  
Vol 17 ◽  
pp. 1957-1970 ◽  
Author(s):  
Eero Tommila ◽  
Maija-Leena Murto ◽  
Bodil Jerslev ◽  
Akikazu Hatanaka ◽  
Jon Munch-Petersen
Keyword(s):  
Ethyl Acetate ◽  
Acid Hydrolysis ◽  
Dimethyl Sulphoxide ◽  
Reaction Velocity ◽  
Hydrolysis Of
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