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- Identify the organic functional group(s) of the reactant, the reaction type, and predict the functional group(s) of the product(s) then draw the major product(s) The reactant is:a. deoxytetroseb. alcohol pentosec. ketohexosed. aldotriosee. aldopentoseThe reaction type is:a. acetal formationb. oxidation (benedict's)c. hemiacetal formationd. acetal hydrolysise. reduction (hydrogenation)f. mutarotationThe product should be:a. alpha 1-4 disaccharideb. deoxyhexosec. carboxylic acid pentosed. alcohol pentosee. alpha pyranosef. no reactionThe cyclic form of this sugar would be A) alpha-anomer as the -CH2OH and the hemiacetal -OH are trans B) beta-anomer as the -CH2OH and the hemiacetal -OH are cis C) beta-anomer as the -CH2OH and the hemiacetal -OH are trans D) alpha-anomer as the -CH2OH and the hemiacetal -OH are cisI. True or False ____________7] Salivary amylase can be use to hydrolyze 1,4 glycosidic bonds of cellulose.____________8] Lobry de Bruyn-van Ekenstein Transformation take place when a sugar is treated with a strongly basic reagent.
- The 1H NMR spectrum of d-glucose in D2O exhibits two high-frequency doublets. What is responsible for these doublets?1. Trehalose is a disaccharide that can be obtained from fungi, sea urchins and insects. Acid hydrolysis of trehalose yields only D-glucose. Trehalose is hydrolysed by α-glucosidase and not by β-glucosidase enzymes. Methylation of trehalose followed by hydrolysis yields two molar equivalents of 2,3,4,6-tetra-O-methyl-D-glucopyranose.From the following experimental data, deduce the structure of trehalose.What will be the effect of trehalose on Fehling’s solution? 2.Suggest a test you will use to show that a given food substance contains proteinAn oligosaccharide isolated from an organism is found tocontain two glucose residues and one galactose residue.Exhaustive methylation followed by hydrolysis producedtwo glucoses with methoxy groups at positions 2, 3,and 6 and galactose with methoxy groups at positions2, 3, 4, and 6. What is the structure of the originaloligosaccharide?
- 3 Trehalose is a disaccharide that can be obtained from fungi, sea urchins and insects. Acid hydrolysis of trehalose yields only D-glucose. Trehalose is hydrolysed by α-glucosidase and not by β-glucosidase enzymes. Methylation of trehalose followed by hydrolysis yields two molar equivalents of2,3,4,6-tetra-O-methyl-D-glucopyranose.From the following experimental data, deduce the structure of trehalose.What will be the effect of trehalose on Fehling’s solution?What sugar is the C-3 epimer of d-xylose? . What sugar is the C-5 epimer of d-allose? What sugar is the C-4 epimer of l-gulose? d. What sugar is the C-4 epimer of d-lyxose?Draw the structure of Ethyl 2-deoxoy-2-fluoro-a-D-galactopyranoside in: i) cyclized Fischer projection ii) in its most stable chair configuration iii) in its least stable chair confirmation
- Draw the products formed when CH3COCH2CH2CH = CH2 is treated with each reagent:(a) LiAlH4, then H2O;(b) NaBH4 in CH3OH;(c) H2 (1 equiv), Pd-C;(d) H2 (excess), Pd-C;(e) NaBH4 (excess) in CH3OH;(f) NaBD4 in CH3OH.Draw a diastereomer of (E)-ocimene.Draw the cyclic alpha equivalent of the sugar shown below