choose the correct answer 40, whatisde product of Cyclinian IH 41. Which reacaun

Question

choose the correct answer

40, whatisde product of Cyclinian IH 41. Which reacaun Requerce wil give [/U/ NA wal giv-zN/ this anne in high yield? ~00H 1 OH 2.UAIH4 1HNEI2 ce 2.KMnQ4 ·HNEtz ci 2, NaBH4 1. HNEI2 2 UAIH4 aith NeOE, grvex this pocdatT (A icil,)CHCHico,CHrt14, B) ICH.) CHCH,circo,CHCH 43. Strtng-sia dieibyl makule I Bom,con), which RKion"-ce will give cycloheae artoAylic aid . esca NOEL 2 . Iint Chiak Bri S, H,0, heat acess NnOta:2, 1,1-dibran cyclobeane; 3. Hao", bcai (D) I cscess NaOEi:1.cH,ar; 3.H4Y,heat 000

Explanation / Answer

40) The given reaction is intermolecular aldol reaction which leads to alpha,beta unsaturated aldehyde. Tthus option D is correct.

41) Synthesis of given amine demand the nucleophilic substitution reaction of NHEt2 on carbonyl compound followed by reduction. Acyl chloride gives better  nucleophilic substitution reaction as chloride is more electrophilic and LiAlH4 is trong reducing agent. Thus option Dd is correct.

42) (CH3)2CHCH2CO2CH2CH3 ;Option A is correct.

43) Diethyl malonate is a source of dianion. It is remained in final product as a CH-COOH

so reaction sequence should be 1.Excess NaOEt , 2. Br(CH2)5Br (cyclohexane ring formation)3. H3O+(ester hydrolysis) , Heat (Decarboxylation) to give the final product.

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