Experimental and Methods
Materials
All chemicals and solvents used in this study such as hexane, ethanol, hydrogen peroxide, toluene and acetic acid were analar grade and were used without further purification. Oleic acid (OA), Linoleic acid (LA), p-toluenesulfonic acid (PTSA), oleyl alcohol (OL) and oleoyl chloride (OLC) were acquired from Fisher and Merck.
Synthesis Reactions
Monoepoxidation of Linoleic Acid (MELA) (2)
Linoleic acid (LA) 1 (1.4 g) was fluxed in 10 mL toluene and 120 mg of Novozym 435® lipase was added to the solution. During stirring the reaction for 15 min, 30% H2O2 (15 μL) was added and the addition was repeated every 15 min for 7 h. after complited the reaction the lipase Novozym 435® was filtered and the mixture of
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The mixture was heated at 110 ºC and for 7 h. The mixture was washed with the water and was dried by using anhydrous sodium sulphate [18].
Synthesis of oleyl 9,(12)-oleoyloxy-10,(13)-oleioxyoctadecanoate (OLOLOODT) (5)
OLHYOODT 4 (2.5g; 0.003 mol), pyridine (1.66 g; 0.002 mol) and CCl4 (10 mL) were mixed and heated at 60 °C. OLC (16.2 g; 0.013 mol) was adding during 1 h, and the reaction mixture was refluxed for (5.5 h). The mixture was washed with the water and was dried by using anhydrous sodium sulphate [19].
Characterization
FTIR and 1H and 13C NMR
FTIR of the products was recorded on a Perkin Elmer Spectrum GX spectrophotometer in the range 400-4000 cm-1. FTIR was used to measure functional groups of the synthesis products. A very thin film of products was applied to NaCl cells (25 mmi.d × 4 mm thickness) for analysis. 1H and 13C NMR analysis was performed with NMR spectroscopy model Joel FCP 400 MHz with the solvent CDCl3. 1H and 13C NMR of the products were recorded on a Bruker 300 NMR spectrophotometer
Many sources of error were responsible for recovering a small amount of product. Introduction: The carbon-carbon bond formation is an important tool in organic chemistry to construct the simple as well as an organic compound. There are several
Tyler White CHEM151LL 32658 04/01/2018 Different Types Chemical Reaction Types and Equations Purpose: The purpose of this lab experiment is to examine different types of chemical reactions such as Decomposition reaction, Synthesis reactions, Combustion reactions, and different Chemical equations. The experiments were conducted online using Late Nite Labs. Materials: Because the experiments were conducted online there wasn’t any physical use of materials, only digital ones, for these labs to be performed. Only the registration for the website was needed to perform these online labs, as well as a desktop computer.
Intro: Chemical reactions are the foundation for all organisms to exist. Paragraph 1: Endergonic Anabolic Reactions Building Consumes energy to build complicated molecules from simpler ones Uphill Photosynthesis Uses water and carbon dioxide to create sugar and oxygen Protein synthesis from amino acids Dehydration reaction Monomers are covalently bonded to each other through the loss of water Bonds are created which means energy is used Endergonic Exergonic Breaking Release energy by breaking down complex molecules to simpler molecules
Equ 13. 4-(5-nolyl)-Pyridinum Cation Containing CILs Catalyzed Aldol Reactions Equ 14. Amide Functionalized Proline based CILs Organocatalyst for Aldol Reactions 3.4. Asymmetric Diels-Alder reaction.
In this laboratory experiment, 3.030 g of Isopentyl Acetate was synthesized and formed by the esterification of acetic acid with Isopentyl Alcohol. 1.0 mL of Sulfuric acid was used as a catalyst in the reaction. The excess Isopentyl Acetate was used to shift the reaction to the right for esterification to occur. During the extraction, the excess of acetic acid and Isopentyl alcohol was extracted with sodium bicarbonate, and further purification of the Isopentyl acetate was done after through drying with anhydrous sodium sulfate and through simple distillation. The percent yield of the Isopentyl Acetate was 46.6 percent with a theoretical yield of 6.502g. In this laboratory experiment the acetic acid was in excess and the Isopentyl Alcohol was the limiting reagent,
The reaction to synthesize benzocaine was known as a Fisher esterification reaction. The Fisher esterification was reaction between alcohol and carboxylic acid in the presence of acid. The reaction was used to form an ester. In the experiment, sulfuric acid acted as a catalyst and necessary for this reaction to occur. There was a change between the –OH group of carboxylic acid to an –OCH2CH3 group in the reaction.
The purpose of this experiment is to perform a two step reductive amination using o-vanillin with p-toluidine to synthesize an imine derivative. In this experiment, 0.386 g of o-vanillin and 0.276 g of p-toluidine were mixed into an Erlenmeyer flask. The o-vanillin turned from a green powder to orange layer as it mixed with p-toludine, which was originally a white solid. Ethanol was added as a solvent for this reaction. Sodium borohydride was added in slow portion as the reducing agent, dissolving the precipitate into a yellowish lime solution.
CHAPTER 2 LITERATURE REVIEW 1) Orlistat Tetrahydrolipstatin commonly known as orlistat is a lipstatin derivative, produced naturally from Streptomyces toxytricini. It is an effective irreversible inhibitor of gastric and pancreatic lipases (Borgstrom, 1988; Hadvary et al., 1988). 2) Chemical Structure Figure 1: Chemical structure of orlistat (Al-Suwailem et al., 2006) Chemically orlistat is (S)-2-formylamino-4-methyl-pentanoic acid (S)-1-[[(2 S, 3 S)-3-hexyl-4-oxo-2-oxetanyl] methyl]-dodecyl ester. Its empirical formula is C29H53NO5, and its molecular weight is 495.7. (Isidro and Cordido, 2010) 3) Mechanism of action and metabolism of orlistat Orlistat covalently bind on the active site of the pancreatic lipase and a stable complex was formed
The purpose of this experiment was to prepare an unknown Grignard reagent and then identify the product by molecular weight and melting point. An IR reading was taken to further identify and validate what product was formed. DISCUSSION AND CONCLUSION Organometallic compounds consist of a carbon that is attached to a metal. The carbon atoms are strongly nucleophilic because of a partial negative charge that they carry.
In our initial experiments, a 19% yield of 3,4-dicarbonyl substituted furan 3a was obtained when α,β-unsaturated carbonyl (1a) and 1,3 diketone (2b) were employed for the reaction (Table 1, entry 1) in a 1:2 molar ratio in the presence of 10mg of CuO-NPs in EtOH at room temperature without any oxidizing agent. When molar ratio of the reactants 1a and 2b were increased to 1:3, an improvement in the yield to 28% was observed (Table 1, entry 2) and molar ratio 1:5 gives the highest yield in the same reaction conditions 38% (Table 1, entry 3). The polar solvent such as DMF, DMSO, H2O, Xylene also gave the desired products but in low yield, while no reactions occurred in acetonitrile, toluene (Table 1, entries 4−9).When we employed a mixture of solvent EtOH: H2O (4:1) slight increase of yield 46% was obtained (Table 1, entry 10), increasing the mixture of solvent ratio to 2:1give the yield 51% (Table 1, entry 11) and solvent ratio 1:1 give the highest yield 60% (Table 1, entry 12).
The yellow solution containing the reactants was slowly poured into the beaker containing the cold water and the acid in order to cause the precipitation of the alcohol, 9-fluorenol and to destroy (hydrolyzed) the unreacted excess sodium borohydride. Subsequently, the white precipitate was vacuum filtered and washed twice with 20.0 ml portions of distilled cold water by pouring the liquid into the Buchner Funnel during filtration. It was necessary to wash the alcohol prior to recrystallization considering that the C-OH bond is easily broken by the formation of a stable and benzylic carbocation that favors the synthesis of difluorenyl ether. Finally, before the purification by recrystallization of the obtained product, the white solid alcohol was allowed to dry over a period of a
The objective of this two-part experiment was to in Part I, create 4-tert-butylcyclohexanone via oxidation of 4-tert-butylcyclohexanol to provide a source of ketone for reduction procedures. Part II of the experiment was conducted preforming a series of reduction reactions in effort to asses the diastereoselectivity of aluminum isopropoxide (MPV reduction), sodium borohydride (NaBH4), and L-selectride when reacted with 4-tert-butylcyclohexanone. The methods used for analysis were TLC, IR, and 1HNMR spectroscopy. An oxidation of 4-tert-butylcyclohexanol was conducted to produce the ketone, 4-tert-butylcyclohexanone using oxidizing reagent, sodium hypochlorite in glacial acetic acid solvent.
Oxidized dextran was reacted with sodium periodate to oxidize. Preparation of Oxidized dextran was done by dissolving dextran (10g) in 100mL of distilled water, then a desired amount of NaIO4. This solution was stirred at a room temperature and shielded from light for 6 hours. The oxidation was terminated by the addition of 2 ml f ethylene glycol. To get the final Odex, the resulting solution was exhaustively dialyzed against water for three days and lyophilized.
Solubility of the compound was determined in different solvents like hydrochloric acid, sul-furic acid, sodium hydroxide, methanol, ethanol, acetone, ethyl acetate, chloroform, DMSO, glacial acetic acid, n-hexane, cyclohexane, n-octanol, diethyl ether, benzene, toluene and wa-ter, followed by the preparation of saturated solution with those solvents which shows good solubility with the synthesized compound and then plotted a linear calibration curve to de-termine the concentration. The solubility determination was based on the USP Criteria (Low Y and Law SL., 1996; Lalitha Y and Lakshmi PK., 2011). 2.7.3. pH 10 mg of the synthesized compound was weighed accurately and placed into three separate volumetric flasks containing suitable solvents
In western society, an individual’s intelligence is seen as an important and valuable asset in many situations. Since such a high value has been put on an individual’s cognitive ability, it has been speculated whether or not this can be expanded, and, if so, to what extent. In summary, intelligence is a complex trait that is unique to each individual. This can vary among a population despite the similar environments that many people are in, such as a shared classroom or school. There are factors that cannot be controlled, such as genetics and heredity, that also play an important part in determining the intelligence of an individual.