Advertisements
Advertisements
प्रश्न
What is meant by hydroboration-oxidation reaction? Illustrate it with an example.
Illustrate the hydroboration-oxidation reaction with an example.
Advertisements
उत्तर
The addition of borane followed by oxidation is known as the hydroboration-oxidation reaction. For example, propan-1-ol is produced by the hydroboration-oxidation reaction of propene. In this reaction, propene reacts with diborane (BH3)2 to form trialkyl borane as an addition product. This addition product is oxidized to alcohol by hydrogen peroxide in the presence of aqueous sodium hydroxide.
\[\ce{\underset{Propene}{CH3 - CH = CH2} + BH3 -> CH3 - CH2 - CH2 - BH2 ->[CH3CH = CH2](CH3 - CH2 - CH2)2BH ->[CH3CH = CH2] \underset{Addition reaction}{(CH3 - CH2 - CH2)3B} ->[H2O/H2O/\overset{-}{O}H]\underset{Propanol}{3CH3 - CH2 - CH2 - OH}}\]
APPEARS IN
संबंधित प्रश्न
Show how is the following alcohol prepared by the reaction of a suitable Grignard reagent on methanal?
Write the mechanism of hydration of ethene to yield ethanol.
How is the following conversion carried out?
\[\ce{Ethyl magnesium chloride -> Propan-1-ol}\]
Name the reagent used in the following reaction:
Dehydration of propan-2-ol to propene.
Name the reagents used in the following reactions:
Write the structures of A, B and C in the following reactions :
Aldehydes react with Grignard reagent to produce ____________.
Aldehydes are reduced to the corresponding alcohols by the addition of hydrogen in the presence of catalysts to form ____________.
Monochlorination of toluene in sunlight followed by hydrolysis by aq. \[\ce{NaOH}\] yields.
Acetone reacts with Grignard reagent to form:
How can propan-2-one be converted into tert- butyl alcohol?
Carboxylic acids are more acidic than phenol and alcohol because of
A compound does not react with 2, 4 dinitrophenylhydrazine, the compound is:
Glycerol as a trimester present in
When glycol is heated with dicorboxylic acid the product are
An aldehyde isomeric with allyl alcohol gives phenyl hydrazone. Pick out a ketone that too gives a phenyl hydrazone containing the same percentage of nitrogen.
How are the following conversions carried out?
\[\ce{Methyl magnesium bromide ->2-Methylpropan-2-ol}\]
How are the following conversions carried out?
\[\ce{Methyl magnesium bromide->2-Methylpropan-2-ol}\]
How are the following conversion carried out?
\[\ce{Methyl magnesium bromide -> 2-Methylpropan-2-ol}\]
