## Answers

Anwerl que- coln CH -cooth heat that 통에 f 11 -coch си som to en diene си, djenophile Mz roch -coch сиз It is a Thor yeloaddition reaction. In this reaction an electron rich diene har 4 elections are feart with elecoon deficient dienophile which has 2 electrons. lie 4+2 cycle addition reaction to give six membered cyclic sing, The stereochemistry of product are find out according Woodward - Hoffmann rule by drawing diene on top and the carbonyl group of dienophile tucked under the diene so it can be done to develop IT-bond. neou Both ch groups are at opposite stereochemispy ice prant to earth other. cąc Hence, option 6 is correct products.

Therefore, anwer is @

que 14 'n-NMR :- ch- 4.18 (q) au 1.8 (t) 34 =) choch 2.18 CS ) 34 ) deshielded due to attached to cassonyl group, o-cry cry It is more deshielded due to attached to electronegative oxygen atom. from the given data the structure of compound 4.1849) ņc 2-1805) Ethyl acetate ماه as so C 13 S (L) en Hence, option © that is compound I lethyl acetates is correct anwer.

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