Iced) 202 02-2022/Paper-1 Consider the following Aldoses/ketoses. Which of them can give same osazone on reaction with - PhNHNH, CHO not CHO . CH₂OH Н-С-ОН CHO HO-C_H C-0 НО-С-Н но-с-н НО-С-Н н (III) H-C-ОН H-C-OH I Н-С-ОН H-C-OH H-C-OH H-C-OH I сону, А? HOẶC H CH₂OH FI, II only C 1, II and IV only (II) H-C-OH Н-С-ОН Г CH₂OH (IV) CH₂OH (B) I, II and III only (D) I, II, III and IV CH2OH

Iced) 202 02-2022/Paper-1 Consider the following Aldoses/ketoses. Which of them can give same osazone on reaction with - PhNHNH, CHO not CHO . CH₂OH Н-С-ОН CHO HO-C_H C-0 НО-С-Н но-с-н НО-С-Н н (III) H-C-ОН H-C-OH I Н-С-ОН H-C-OH H-C-OH H-C-OH I сону, А? HOẶC H CH₂OH FI, II only C 1, II and IV only (II) H-C-OH Н-С-ОН Г CH₂OH (IV) CH₂OH (B) I, II and III only (D) I, II, III and IV CH2OH

Organic Chemistry

9th Edition

ISBN:9781305080485

Author:John E. McMurry

Publisher:John E. McMurry

Chapter25: Biomolecules: Carbohydrates

Section25.SE: Something Extra

Problem 26VC

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In 1891, Emil Fischer determined the structures of glucose and the seven other d-aldohexoses using only simple chemical reactions and clever reasoning about stereochemistry andsymmetry. He received the Nobel Prize for this work in 1902. Fischer had determined thatd-glucose is an aldohexose, and he used Ruff degradations to degrade it to (+)-glyceraldehyde. Therefore, the eight d-aldohexose structures shown in Figure 23-3 are the possiblestructures for glucose.Pretend that no names are shown in Figure 23-3 except for glyceraldehyde, and usethe following results to prove which of these structures represent glucose, mannose,arabinose, and erythrose.(a) Upon Ruff degradation, glucose and mannose give the same aldopentose: arabinose.Nitric acid oxidation of arabinose gives an optically active aldaric acid. What are thetwo possible structures of arabinose?(b) Upon Ruff degradation, arabinose gives the aldotetrose erythrose. Nitric acid oxidation of erythrose gives an optically inactive…
In 1891, Emil Fischer determined the structures of glucose and the seven other d-aldohexoses using only simple chemical reactions and clever reasoning about stereochemistry andsymmetry. He received the Nobel Prize for this work in 1902. Fischer had determined thatd-glucose is an aldohexose, and he used Ruff degradations to degrade it to (+)-glyceraldehyde. Therefore, the eight d-aldohexose structures shown in Figure 23-3 are the possiblestructures for glucose.Pretend that no names are shown in Figure 23-3 except for glyceraldehyde, and usethe following results to prove which of these structures represent glucose, mannose,arabinose, and erythrose.(a) Upon Ruff degradation, glucose and mannose give the same aldopentose: arabinose.Nitric acid oxidation of arabinose gives an optically active aldaric acid. What are thetwo possible structures of arabinose?(b) Upon Ruff degradation, arabinose gives the aldotetrose erythrose. Nitric acid oxidation of erythrose gives an optically inactive…
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5-Deoxyglucose will close to a?