Concept explainers
(a)
Interpretation:
The name of the aldose is to be stated. The Fischer projection of the aldose is to be drawn.
Concept introduction:
Aldose is a carbohydrate which contains an
(b)
Interpretation:
The name of the aldose is to be stated. The carbons which have same and different configuration from glucose are to be identified.
Concept introduction:
Aldose is a carbohydrate which contains an aldehyde group. Pyranose is the cyclic form of the aldose which consists of a six-membered ring made up of four carbon atoms and one oxygen atom. The pyranose ring is substituted with hydroxy groups, hydrogen atoms, and a
(c)
Interpretation:
The name of the aldose is to be stated. The Fischer projection of the aldose is to be drawn.
Concept introduction:
Aldose is a carbohydrate which contains an aldehyde group. Furanose is the cyclic form of the aldose which consists of a five-membered ring made up of four carbon atoms and one oxygen atom. The furanose ring is substituted with hydroxy groups, hydrogen atoms, and a
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Organic Chemistry
- The cyclic hemiacetal is more stable than the open-chain form, so very little of the open-chain form is present atequilibrium. Will an aqueous solution of glucose reduce Tollens reagent and give a positive Tollens test? Explain.arrow_forward(a) Which is more reactive towards Electrophilic aromatic substitution (EAS)? (b) Which of the following is a a meta-substituted compound? (c) Which is the least reactive towards Electrophilic aromatic substitution (EAS)? (d) Which is an ortho-substituted compound?arrow_forwardAn aldose A, is reduced by sodium borohydride to an optically inactive alditol B. The Ruff degredation of A forms C. Oxidation of C by nitric acid generates the optically inactive diacid D. The ruff degreation of C forms D-glyceraldehyde. draw the structures for compounds A through D and discuss a mechanism for the reduction step using sodium borohydridearrow_forward
- (a) Which compounds (B–F) are identical to A? (b) Which compounds (B–F) represent an isomer of A?arrow_forward(a) Which is the correct structure of the alkyl halide substrate? (b) Which is the correct structure of the nucleophile?arrow_forwardDraw the expected product of the reaction of the following sugars with excess methyliodide and silver oxide.(a) a-d-fructofuranosearrow_forward
- (b) (i) Salbutamol, which is used in ventolin inhaler to relieve asthma, has the structural formula as shown below. Write all the chemical equations involved when salbutamol is: HO. OHarrow_forwardclassify the structures of subgroups of lignans in the image according to IUPAC and correlated them There can be more than one subgroup in each parenthesis, if there is no corresponding subgroup, leave it blank ( ) Substituted tetrahydrofuran ( ) Dibenzylbutane ( ) Aryltetralin ( ) Arylnaphthalene ( ) Dibenzylbutyrolactone () Diarylfurofuran () Dibenzocyclooctadiene () Dibenzylbutyrolactolarrow_forwardThe saccharide shown here is present in some plant-derived foods. (a) Indicate the anomeric carbon atom(s) in this structure by drawing a circle around the atom(s) or by drawing an arrow pointing to the atom(s). (b) Would this saccharide give a positive result with Benedict’s reagent? Why or why not? (c) Would this saccharide give a positive result with Barfoed’s reagent? Why or why not? (d) Would this saccharide give a positive result with Seliwanoff’s reagent? Why or why not? (e) In a separate set of experiments, the saccharide solution was treated with a reagent that breaks glycosidic bonds. After this treatment, would any of the three assays give different results? Be sure to indicate which assay results would be different and give a reason.arrow_forward
- (b) Show how to synthesize the molecule at right, using the molecule at left as a carbon source, plus any other reagents without restriction. KOH H₂ EtOH Pd/Carrow_forward(a) What functional group is undergoing a transformation in the reaction? (b) What functional group is it being transformed into (in the final product)?arrow_forwardThe most stable conformation of most aldopyranoses is one in which the largest group, the CH2OH group, is equatorial. However, alpha-D-idopyranose exists primarily in a conformation with an axial CH2OH group. Write formulas for the two chair conformations of a-D-idopyranose (one with the CH2OH group axial and one with the CH2OH group equatorial) and provide an explanationarrow_forward