5. Some physiologically important pyridine derivatives are related to vitamin B6. This is a relatively simple pyridine d

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5 Some Physiologically Important Pyridine Derivatives Are Related To Vitamin B6 This Is A Relatively Simple Pyridine D 1 (37.26 KiB) Viewed 41 times

5. Some physiologically important pyridine derivatives are related to vitamin B6. This is a relatively simple pyridine derivative. The R group at C-4 may be a fragment of an alcohol, aldehyde, or amine. The vitamin functions as a coenzyme in the interconversions of oxo carboxylic acids and amino acids. Which of the following statements corresponds to the structure and properties of pyrido: phosphate? (a) the unshared electrons of the nitrogen are involved in conjugation to form aromatic sextet (b) it contains the pyrrole ring system; (c) it forms a salt with acetic acid; (d) it forms a salt with potassium hydroxide, disposing all hydroxyl groups; (e) it reacts with ethanol to ester. Write equations for reactions, if they take place. 0 CHLO-POH HO. CH, H OH pyridoxal phosphate