Indian Forest Service (Mains), Chemistry optional · 2022 · Paper II

Q2(d). Claisen rearrangement of an allyl vinyl ether

5 marks
Topic: Rearrangements
Question only

Question

Complete the methylcyclohexenyl vinyl ether reaction at 190 °C, naming the process and showing electron movement. [structure given in the paper]

Model answer

The free solution for 2022 answers questions 1, 3, 5, 7 and 8, the ones picked in its time plan. This part is not answered on the site yet. New answers are announced on Telegram.

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Topic notes: pericyclic reactions, with every Civil Services, IFoS and Geo-Scientist PYQ →

CoversClaisen rearrangementallyl vinyl ether[3,3]-sigmatropic shiftγ,δ-unsaturated carbonylpericyclic reaction

All parts of Question 2

2(a) Two eliminations from a meso dibromide10 marks
2(b) Favorskii rearrangement of a dibromoketone10 marks
2(c) Rearrangement of a bornane alcohol10 marks
2(d) Claisen rearrangement of an allyl vinyl ether5 marks
2(e) Deuterium and hydrolysis rate5 marks