Product (s) formed during this reaction is/ar | vedclass

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(D) The reaction involves the participation of the neighboring group (Neighboring Group Participation - $NGP$). The lone pair on the oxygen atom of th

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Both $(a)$ & $(b)$

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(D) The reaction involves the participation of the neighboring group (Neighboring Group Participation - $NGP$). The lone pair on the oxygen atom of the phenolic group (or the pi-electrons of the ring) can participate in the displacement of the tosylate group $(-OTs)$.This leads to the formation of a cyclic intermediate (phenonium-like ion or a spiro-intermediate).Because of the symmetry or the nature of the intermediate,the nucleophile $(AcO^-)$ can attack at either of the two electrophilic carbon atoms of the side chain.As shown in the mechanism,the $AcO^-$ ion attacks both the $C^*H_2$ and the $CH_2$ positions,resulting in a mixture of both products $(a)$ and $(b)$.

Product $(s)$ formed during this reaction is/are

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