Question

Section: 17-14 63. Give the major product for the reaction. Justify your answer. 1. CH, CHECHE CH2CH3 CHC осн; 2. HCI excess B) A) C) OO DO DEO CH,CHE CH2CH2 CH:CHE CHCH3 CH, CH2 CHCH CH CH:09 OH CHO D) E) OH =O CH CH3 CH,CHE CHCH CH,CHE CHO O CHO “Η

Answer 1

Reaction Secule Chat Chao Porta 1. CH₃o CH₃CH2 -CH2CH3 + CH307 -OCH 2. Hel 0 CH3CH2 -CH-CH3 (c) correct option is cc) Mechanism Step -I Enolate fomation. 요 o the C СН3-СН2- CH-CH3 ti CH3 CH2-C=CH-CH? CH3 Enolate Strong base tom enolate Like stable Chao gains a-hydrogen intermediate i.e: to

step-t attack enolate ok CH₃ CH2-C=CH-CH3 + cho HA coctly 70 och CH₃CH2 - — СН3 CH3CH2 TH₂ OCHA -ochz Enolate attack's carbonyl carbon to give addition product these new Carbon carbon bonel fom's step -IT Acidic workup CH3CH2 сHз H-ci H CH3 CH3 – C CH -CH₂ осHз Octly co) final product. Intermediate work up givels from step I on acidic beta keto ester cc)

Ketones reacts strong base forms enolate, then enolate reacts with carbonic esters which on further acidic workup gives beta keto esters as a final product.

So correct answer is – ( C)