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5. Sugar molecules exist in equilibrium between an open chain form and a cyclic hemiacetal form. Five-membered ring cyclic sugars are named 'furanoses' and six- membered ring sugars are named 'pyranose'. 5.1 Identify which OH will react to form a furanose sugar. Circle it and label it a 'nucleophile'. Draw the Hayworth projection of the cyclic furanose sugar in both alpha and beta forms. Label the anomeric carbon. CHO HO H HO H H- .OH H OH CH2OH 5.2 Identify which OH will react to form a pyranose sugar. Circle the OH and label it a 'nucleophile'. Draw the Chair conformation of the cyclic pyranose sugar in both alpha and beta forms. Label the anomeric carbon. CHO HO― H HO -H H-OH H- OH CH2OH

5. Sugar molecules exist in equilibrium between an open chain form and a cyclic hemiacetal form. Five-membered ring cyclic sugars are named 'furanoses' and six- membered ring sugars are named 'pyranose'. 5.1 Identify which OH will react to form a furanose sugar. Circle it and label it a 'nucleophile'. Draw the Hayworth projection of the cyclic furanose sugar in both alpha and beta forms. Label the anomeric carbon. CHO HO H HO H H- .OH H OH CH2OH 5.2 Identify which OH will react to form a pyranose sugar. Circle the OH and label it a 'nucleophile'. Draw the Chair conformation of the cyclic pyranose sugar in both alpha and beta forms. Label the anomeric carbon. CHO HO― H HO -H H-OH H- OH CH2OH

Organic Chemistry
Organic Chemistry
9th Edition
ISBN:9781305080485
Author:John E. McMurry
Publisher:John E. McMurry
Chapter25: Biomolecules: Carbohydrates
Section25.SE: Something Extra
Problem 29VC
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5. Sugar molecules exist in equilibrium between an open chain form and a cyclic hemiacetal form. Five-membered ring cyclic sugars are named 'furanoses' and six- membered ring sugars are named 'pyranose'. 5.1 Identify which OH will react to form a furanose sugar. Circle it and label it a 'nucleophile'. Draw the Hayworth projection of the cyclic furanose sugar in both alpha and beta forms. Label the anomeric carbon. CHO HO H HO H H- .OH H OH CH2OH 5.2 Identify which OH will react to form a pyranose sugar. Circle the OH and label it a 'nucleophile'. Draw the Chair conformation of the cyclic pyranose sugar in both alpha and beta forms. Label the anomeric carbon. CHO HO― H HO -H H-OH H- OH CH2OH
Transcribed Image Text:5. Sugar molecules exist in equilibrium between an open chain form and a cyclic hemiacetal form. Five-membered ring cyclic sugars are named 'furanoses' and six- membered ring sugars are named 'pyranose'. 5.1 Identify which OH will react to form a furanose sugar. Circle it and label it a 'nucleophile'. Draw the Hayworth projection of the cyclic furanose sugar in both alpha and beta forms. Label the anomeric carbon. CHO HO H HO H H- .OH H OH CH2OH 5.2 Identify which OH will react to form a pyranose sugar. Circle the OH and label it a 'nucleophile'. Draw the Chair conformation of the cyclic pyranose sugar in both alpha and beta forms. Label the anomeric carbon. CHO HO― H HO -H H-OH H- OH CH2OH
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