A carbonyl compound P, which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to given an olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R, which undergoes intramolecular-aldol reaction to give predominantly S.
$P = 1. M e M g B r - --------------- \to 2. H^{+}, H_{2} O 3. H_{2} S O_{4} / h e a t Q 2. O_{3} / Z n - H_{2} O - -------- \to R O H^{-} - -- \to h e a t S$

The structure of the carbonyl compound P, is

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Solution

The correct option is B

Note - Cyclic product will be more stable.

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Q. A carbonyl compound P, which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to given an olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R, which undergoes intramolecular-aldol reaction to give predominantly S.

P = 1. M e M g B r - --------------- \to 2. H^{+}, H_{2} O 3. H_{2} S O_{4} / h e a t Q 2. O_{3} / Z n - H_{2} O - -------- \to R O H^{-} - -- \to h e a t S

The structure of the product S, is

The structure of the carbonyl compound P, which gives positive iodoform test undergoes reaction with MeMgBr followed by dehydration to give an olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R, which undergoes intramolecular aldol reaction to give predominantly S.

The structure of the carbonyl compound P is:

Q. A carbonyl compound P (from i-iii), which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to give an olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R, which undergoes intramolecular aldol reaction to give predominantly S.

1.The structure of Q and R are respectively:

Q. A carbonyl compound P (from i-iii), which gives positive iodoform test, undergoes with MeMgBr followed by dehydration to give an olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R, which undergoes intramolecular aldol reaction to give predominantly S.

2. Product S is :

Q. A carbonyl compound P, which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to give an olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R, which undergoes intra-molecular aldol reaction to give predominantly S.

The structure of the carbonyl compound P, is

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The correct option is B Note - Cyclic product will be more stable.

The correct option is B

Note - Cyclic product will be more stable.