21I m a lil sceptical abt MPV...
THOUGH I KNOW THAT IN MOST(99.99%) EG. MPV REDUCES KETONE
BUT if u c its mech. the alkyl grps do not play a majpr role in it....
so I feel it wud reduce aldehyde as well...........
This is a very standard question If I can dare to put it that way.
Edit: sorry used alcohol instead of aldehyde :((
What do we do if we have to reduce only the ketone group in a compound that contains both ketone and aldehyde?
and vice versa!
Suggestions invited.
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24 Answers
21
39and phenol group by acylation i.e eithr acetylation or benzoylation.
39triple bond also same way as double bond. we get tetra bromo derivative and it also goes away by same method.
21if u wont to totally reduce it.... my method contd.... after step 3....
4') add conc H2SO4, heat, and then hydrogenate.....
21mazak kar rahe ho kya??
wen u prot. ald wudnot even keto get protected buddy????
39i am sorry, initially sir posted to oxidise ketone in presence of alcohol.
sorry, i didnt see the edit.
and ya mpv main both will pakka get oxidised, no way aldehyde is left away
39alcohol can be protected in the form of ester, then we can oxidise alone the ketone.
21perform Tollen's test!!!
1) aldehyde is oxidized to carboxylic acid.....ketone unaffected
2)protect keto by addin ethylene glycol (ketal formation)
3)Add Lithium Aluminium Hydride (LAH) to reduce acid to alcohol..... ketal unaffected
4) Add H+ to convert ketal to keto.....
u get ur keto unaffected and aldehyde to alcohol [1]
39humaare institute main aise hiii bekhaar cheez padaate hain........
{bekaar logon ko bekaar cheez}
3""""MEERWEIN PONDORFF VERLY REDUCTION"""""" kahan se yeh sab padthe ho yaar!!!!!
1>> to kp ketone grp safe. ... do acetal reaction .
and wat do you want to make by reducing alcohol ??
39in mpv redn
aluminium isoprpoxide in opresence of isoprpyl alcohol is used, it reduces only ketone
39or in general, if we have to reduce onle a ketone group in a polyfunctional compound, we need to use
MEERWEIN PONDORFF VERLY REDUCTION
