GATE CY topic:organic-synthesis PYQs & Answers — Page 7

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topic:organic-synthesis

Questions 61–70 of 116. Imported answers require independent review unless marked reviewed.

Topic practice 116 questionsPage 7 of 12

The major product formed in the following reaction [a methoxy- and trimethylsilyl-substituted diene reacts with acrylonitrile; (i) Δ, (ii) aqueous acid] is:

Your answerChoose one option.

Diagram for Chemistry question 3 (figure 2)

Diagram for Chemistry question 3 (figure 3)

Diagram for Chemistry question 3 (figure 4)

Diagram for Chemistry question 3 (figure 5)

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The least acidic among the following compounds [M: methyl propiolate; N: a carboxylic acid; O: methoxy-substituted phenol; P: benzenesulfonic acid] is:

Your answerChoose one option.

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The reagent(s) required for the conversion of hex-3-yne to (E)-hex-3-ene is/are:

Your answerChoose one option.

H₂, Pd/BaSO₄

Bu₃SnH

Li / liquid NH₃

LiAlH₄

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The major product formed in the following reaction

is:

Your answerChoose one option.

non-6-yn-2-one

non-3-yn-8-one

non-2-yn-6-one

non-3-en-8-one

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The major product formed in the following reaction

is:

Your answerChoose one option.

Diagram for Chemistry question 31 (figure 2)

Diagram for Chemistry question 31 (figure 3)

Diagram for Chemistry question 31 (figure 4)

Diagram for Chemistry question 31 (figure 5)

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In the following reaction sequence [indanyl methyl ether treated with (i) sec-BuLi, THF; (ii) ZnCl₂ to give P; then 2-bromopyridine, Pd(PPh₃)₄, THF to give Q], the major products P and Q, respectively, are: