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Topic: PhCOCH3( Ketone ,not ether + CH3COOH/Br2 -------> PHCOCH2BR  (Read 8367 times)

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Offline timchai

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PhCOCH3( Ketone ,not ether + CH3COOH/Br2 -------> PHCOCH2BR
« on: March 03, 2009, 06:41:21 AM »
PhCOCH3( Ketone ,not ether    + CH3COOH/Br2 ------->   PHCOCH2BR    , i want to ask wt is the use of CH3COOH
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Offline AWK

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Re: PhCOCH3( Ketone ,not ether + CH3COOH/Br2 -------> PHCOCH2BR
« Reply #1 on: March 03, 2009, 07:16:12 AM »
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Offline kanan

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Re: PhCOCH3( Ketone ,not ether + CH3COOH/Br2 -------> PHCOCH2BR
« Reply #2 on: March 03, 2009, 11:36:23 PM »
 acetic acid acts as a catalyst in which the O-carbonyl is protonated leads to a significant ease of enole formation followed by carbanion availability which can attack the +ve Br through alpha carbonyl substitution.
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