Concepts in organic synthesis

Concepts in organic synthesis: Retrosynthesis, disconnection, synthons, linear and convergent synthesis, umpolung of reactivity and protecting groups.

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 5   – 1 1 1 1 3 1 2 3

1.The major product formed in the following reaction is 

reduction-reagents-csir-ugc-net-chemical-sciences

2.The major product formed in the following reaction is….

carbohydrates-deprotection

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

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

 

4.The major products A and B in the following reaction sequence are

4-organic-synthesis-csir-net-gate-chemical-science-june-2016

 

5.Structures of the intermediate A and the major product B in the following reaction sequence are

5-organic-synthesis-csir-net-gate-chemical-science-june-2016

 

6.The products A and B in the following reaction sequence are

6-organic-synthesis-csir-net-gate-chemical-science-dec-2015

 

Post Your Doubts