Asymmetric synthesis

 Asymmetric synthesis: Chiral auxiliaries, methods of asymmetric induction – substrate, reagent and catalyst controlled reactions; determination of enantiomeric and diastereomeric excess; enantio-discrimination. Resolution – optical and kinetic.

YEAR JUN-2016 DEC-2015 JUN-2015 DEC-2014 JUN-2014 DEC-2013 JUN-2013 DEC-2012 JUN-2012 DEC-2011 JUN-2011
No.of questions appeared 2 1 2 2 3 3 4 4 4 3

1.The major product formed in the following reaction is

asymetric-synthesis-csir-net-gate-chemical-science-june-2016

 

2.The major product formed in the following reaction is

2-asymetric-synthesis-csir-net-gate-chemical-science-june-2016

 

3.The major product formed in the following reaction sequence is

3-asymetric-synthesis-csir-net-gate-chemical-science-dec-2015

4.The absolute configurations of the chiral centres of starting ketone in the following reaction is

4-asymetric-synthesis-csir-net-gate-chemical-science-dec-2014

(a) 3R, 6S

(b) 3S, 6S

(c) 3R, 6R

(d) 3S, 6R

 

5.The major product formed in the following transformation is

5-asymetric-synthesis-csir-net-gate-chemical-science-dec-2014

 

6.The major product B formed in the following reaction sequence, and overall yield of its formation are

6-asymetric-synthesis-csir-net-gate-chemical-science-dec-2013

 

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