M.Sc. (Semester IV) (CBCS) Examination Nov/Dec-2018
Organic Chemistry
CHEMISTRY OF NATURAL PRODUCTS
Time: 2½ Hours
Max. Marks: 70
Instructions: Attempt in all five questions. Section I (question is compulsory. Attempt any two questions from Section II. Attempt any two questions from Section III. All questions carry equal marks.
SECTION I
Q.1.

Fill in the blanks:
07
Vitamin B2 or Riboflavin is also known as
Head to tail union of isoprene unit in terpenoids is called
Precursors of alkaloids are
Substances derived from 2-phenyl chromane are termed compounds.
The position of double bond in progesterone is
Angular methyl group at are cis in steroids.
The terpenoid does not follow isoprene rule.

Predict the product of the following:
07
SECTION II
Q.2
Give the total synthesis of reserpine.
07
Discuss the biosynthesis of any one of the prostaglandins.
07
Q.3
Discuss the synthesis of biological functions of vitamin B6
07
Give the biosynthesis of cholesterol from squalence.
07
Q.4
Discuss the structure determination and synthesis of testosterone.
07
Discuss isolation and synthesis of strychnine.
07
SECTION III
Q.5
Discuss functions Hams Folker's synthesis of pyridoxine.
05
Discuss the biosynthesis of abietic acid.
05
How will you confirm the position of keto group in oestrone?
04
Q.6
Discuss the stereochemistry of steroid skeleton.
05
Discuss the synthesis of lactoflavin.
05
Discuss the structural evidences of Hardwickiic acid.
04
Q.7
Write notes on any three:-
14
Classification of terpenoids with examples.
Structure determination of androsterone
Biological role of vitamin B6 in transamination
Synthesis of comptothecin