Nalanda Open University 2010 M.Sc Chemistry Part–I, –VIII (Natural Products) Annual , - Question Paper
M.Sc. Chemistry Part–I, Paper–VIII (Natural Products) Annual Examination, 2010
Part-I, Paper-VIII (Natural Products)
Annual Examination, 2010 Full Marks : 80 l ime : 3 Hours.
Ansiver ant/ II VL Questions. All questions earn/ equal marks.
1. (a) What are alkaloids ? Enumerate atleast four important classes of alkaloids.
(I)) Write down the chemical structure of the following alkaloids.
(i) Quinine; (ii) Morphine; (iii) Narcotine; (iv) Meconine.
2. What are Hormones ? Write the degradative and synthetic evidences for the elucidation of the structure of Estrone.
3. I low are haemine and chlorophyll structurally related ? Give synthesis of anv parphvrin that you know. I low will you convert haemine in to mesoporphvrin ?
4. (a) Draw the structure of obietic acid anil mark the isoprene units in the structure of
abietic acid.
(I)) Give synthesis of abietic acid.
5. Elucidate the structure of a fat soluble vitamin having molecular formula C20 Hio O and deficiency of which in human diet causes Night Blindness.
6. (a) I low is a flavone related to isoflavone ?
(I)) Give a critical account of the structure determination and synthesis of isoflavone.
7. (a) Disi'uss the isolation of morphine from opium.
(I)) Give evidences in support of the structure of morphine.
8. Elucidate the structure of vitamin B2 (Riboflavin). Give synthesis of vitamin B;
9. Discuss any Two of the following transformations (a) Methvlhepteone to Zingiberene.
(I)) Dienone to Santonin.
(c) Opianic acid to Meconine.
(d) Narcotine to Nttr-Narcotine.
10. Write notes on am- Three of the following (a) Pvridoxal and Pvridoxamine.
(I)) Geometrical isomers of vitamin A.
(c) Point of linkage between quininic acid and meroquinene in quinine.
(d) Presence of phenanthrene nucleus in morphine.
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