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How to prepare butanol from ethyl magnesium bromide? ????

How to prepare butanol from ethyl magnesium bromide? ????

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3 Answers

Arun
25750 Points
6 years ago
Dear student
 
This is a little tricky; you can't get 1-butanol by using ethyl magnesium bromide to attack a carbonyl, because the -OH group ends up in the wrong place. You need to attack something else: an epoxide. 

A Grignard will open an epoxide ring, giving an anionic oxygen that can be protonated. If you attack ethylene oxide, also called oxirane, with ethyl magnesium bromide, you'll get 1-butanol.
 
 
 
Regards
Arun (askIITians forum expert)
S.G PANDA
25 Points
6 years ago
Sir thank u thank u very much... Now i can solve this one by using epoxide and hydrolysing the product... hats off sir...
Vishal Jagwani
25 Points
6 years ago
React it with ethanal in presence of dry ether. Further on treating with H2O and dil HCl,it will form butanol and MgBrOHGood luck!!

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