Question

Which method would give this ketone? CH,CHE 1. PhMgBr 2. H307 1. CH3CH MgBr 2. Hz0+ 1. CH2CHCN 2. PHCN CH3CH,COCI, AICI: TOLONIA O2 and 3 only 1 and 3 only

or esterfication for D

Answer 1

Pyridine y Bio Sono Br2, Acetic acid Bysime. you In the first step, alpha carbon to carbonyl is brominated. In the second step, dehydrobromination occurs to form alkene. Hence Compound C is correct option Br NaCN M CN H307, Heat COOH 1-bromo-3-methylbutane 4-methylpentanenitrile 4-methylpentanoic acid -bromo-3-methylbutane is convrted to 4-methylpentanenitrile by NaCN. Then it is hydrolysed to give 4- nethylpentanoic acid as major product Hence Compound B is correct option

Which method would give this ketone? CH,CH 1. PhMgBr 2. Hz0+ 1. CH2CH MgBr 2. H30* 1. CH CH CN 2. PHCN CHCH,COCI, AICI: All the methods will give the above ketone. O2 and 3 only Question 14 (1 point) Which structure is consistent with the following proton NMR data: 1.2 (3H, triplet, J = 8Hz), Ethyl group signals 3.7 (2H, quartet, J = 8Hz), 4.1 (2H, singlet), CH2 signal 11.1 (1H, singlet) Carboxylic acid peak CH,CH3 0 госн. А What is the product of this reaction sequence? 1. NaOEt 2. PhCH BY 3. H20, Heat a OB LOC OD NaOEt abstracts proton and benzylated at middle carbon to carbonyl groups. Then ester hydrolysis was done Resulting carboxylic acid was decarboxylated under heating condition