Question

Question 3 (20 MARKS) 1 state you reason your in the following reaction, which product will be formed between B and C reason is wrong, whole answer is wrong no marks will be allocated) EIOH NaOEL * Со он or но hooEt в бEt 2. Suggest reagents (a,b and c) suitable for carrying out step in the following synthetic sequence: (3) Br 3. Fill in the reagents, or the minor and major products, and show stereochemistry where necessary (11) Show stereochemistry

Answer 1

Answer CroH Naont- Oh oer (C) (majm) aci-as nucleophile attack to less staric hindrance centre, unelephilie Substitution take place. Bra Br₂ Bra COBA milie BT Electrophilic additim Im-chloroperty Bri (benzoic acid mcpma I acc. Kot (2 mol.) Elimination) 03 Dels Alden Reaction Her Etzo This Yeaction known as markownikat additim. the reaction proceed throuch more stable carbreation. and . A Bra Bm • Cantiadditing r optically active (compound Scanned with CamScanner.

Vc. Mech! Dr. 10: Nnelerphilic attack to the more stable Carbocation. like centre at (optically active] cmc. . H₂SO4 Mechanism ,042 Elimination reaction Joccur. and. more Substitute malkene formed, * A Elona. OE- Erohr proceed. Through The reaction sn, reaction. orsoal, Scanned with CamScanner

a sociz con plenty om aikyl chloride alkyl bromide Br na HAY Harry (K.C.P ) Bon mechanism T.C.pl Rr. (1/) 12 prodnela o (4 proaner) -OH Cmc. H2504 1 Prog heak Ін, а VOH Scanned with CamScanner

Meeh ! Le оно. la of & Climation. reaction ruur. Hoi Brz HO attack Stabilizce Poromination reaction runng. Carbication. like centre. , ОН - Rr. Scanned with CamScanner