نتایج جستجو برای: Esters
تعداد نتایج: 28401 فیلتر نتایج به سال:
krytyn triplet alkyl esters ayzvsyanydha reactions and lead to the production of acetylene is stable.
the synthesis of twenty five esters of testosterone (17β -hydroxyandrost- 4-en-3-one) is described. all esters are derivatives of cycloalkycarboxylic acids. some of the esters possess α- , β -and/or & - substitution in the ester side-chain. the work was undertaken in order to evaluate long-acting male antifertility effect of such esters. most of the compounds, especially compound no.1, were fou...
Caffeic acid phenethyl ester(CAPE) suppresses the growth of transformed cells such as human breast cancer cells, hepatocarcinoma , myeloid leukemia, colorectal cancer cells, fibrosarcoma, glioma and melanoma. A group of heterocyclic esters of caffeic acid was synthesized using Mitsunobu reaction and the esters were subjected to further structural modification by electrooxidation of the catecho...
a most effective and less energy demanding method of producing fatty esters, diol esters, by esterifying fatty acids, with neopentyl and ethylenglycol alcohols in the presence of an acidic ion exchange resin catalyst(polyestyrendivinylbenzensulfated) was investigated at elevated temperature. in this process an azeotroping agent, toluene, was used to facilitate continuous removal of water by dis...
The synthesis of twenty five esters of testosterone (17β -hydroxyandrost- 4-en-3-one) is described. All esters are derivatives of cycloalkycarboxylic acids. Some of the esters possess α- , β -and/or & - substitution in the ester side-chain. The work was undertaken in order to evaluate long-acting male antifertility effect of such esters. Most of the compounds, especially compound No.1, wer...
caffeic acid phenethyl ester(cape) suppresses the growth of transformed cells such as human breast cancer cells, hepatocarcinoma , myeloid leukemia, colorectal cancer cells, fibrosarcoma, glioma and melanoma. a group of heterocyclic esters of caffeic acid was synthesized using mitsunobu reaction and the esters were subjected to further structural modification by electrooxidation of the catechol...
Deprotection of phosphate, phosphate, and sulfite esters by silica chloride is described. Silica chloride is a mild, selective, and effective reagent for cleavage of benzyl and t-butyl esters of the above compounds.
تعیین غلظت استرهای فتالات در آب های بطری شده در ظروف پلی اتیلن ترفتالات(PET) تحت شرایط مختلف نگهداری
Background and purpose: Consumption of bottled water is increasing in the world and there are many concerns about the migration of phthalate esters into bottled water. These compounds are risky for consumers. This study investigated the concentration of phthalate esters in bottled water in polyethylene terephthalate containers in different storage conditions. Materials and methods: Bottled wat...
deprotection of phosphate, phosphate, and sulfite esters by silica chloride is described. silica chloride is a mild, selective, and effective reagent for cleavage of benzyl and t-butyl esters of the above compounds.
A general, mild and efficient protocol has been developed for the synthesis of esters and thioesters. The process has been taking place using tetra n-butylammonium iodide (TBAI) as a phase-transfer catalyst and in the presence of potassium carbonate (K2CO3). A wide range of esters and thioesters was prepared in high yields and suitable times by the treatment of alcohols, phenols and thiols with...
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