## Question

###### Provide product for following mechanisms shown 1. NaOCH, 1. H, 2. heat حمله Page 1 of...

provide product for following mechanisms shown

1. NaOCH, 1. H, 2. heat حمله Page 1 of 4

## Answers

NaOCH

_{3}gives OCH_{3}^{-}which is a strong base and it abstracts the most acidic proton.Thereafter the anion(formed upon acid-base reaction in last step) undergoes S

_{N2}reaction with given alkyl bromide.As this is S_{N2}reaction, so it will be favoured much at the position where least hindrance is present.During this S_{N2}reaction, the anion attacks (from backside) at the carbon to which least hindred bromine is connected.

Remember the configuration of dark bond(chiral carbon) will not changeAfter this ester hydrolysis takes place and ester is converted to carboxylic acid.

and Upon heating CO

_{2}leaves.step 1 T och Nat Š most acidic hydrogen BY -Br least hindered Step-2 Br LG •BrBr ester hydrolysis OH 1110) Br tautomerisation lilia Final product به گم

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