00:01
Hello students, so the question is to propose a suitable reagent to accomplish this following transformation.
00:07
So, here the suitable reagent will be hgso4 with h2so4 and water.
00:19
So, this is the first reagent and this will be the second reagent.
00:23
So, this is the answer.
00:24
Now, let us see the mechanism of it, mechanism for this transformation.
00:32
So, here we have the alkyne group at this position.
00:36
So, let us first draw the reactant.
00:39
So, here this is the alkyne group and here we have first reactant reagent which is hg2 +, this has been dissociated so4 to negative.
00:51
So, this alkyne will act as a nucleophile and it will attack this electrophile over here and will produce a secondary cation at this position.
01:02
So, let us draw the intermediate.
01:04
So, this is the intermediate and here the carbocation has been formed.
01:08
Now, the second reagent which is h2o over here, the oxygen will act as a nucleophile because it has two lone pairs.
01:18
So, this nucleophile now attack to this carbocation which is acting as a electrophile and will produce a secondary alcohol over here and this will act as a and this will be stabilized by the enol formation.
01:36
So, here the enol, so here this product is in the resonating structure like this...