Question

?From Propyne how can you prepare 2-aminobutane

Answer 1

The chemical formula of propyne is

The chemical formula of 2-aminobutane is

?From Propyne how can you prepare 2-aminobutane

a) Reaction of propyne with NaNH₂)

One of the major differences between the chemistry of alkynes and that of alkenes or alkanes is that a hydrogen bonded to a triply bonded carbon atom of a terminal alkyne is sufficiently acidic that it can be removed by a strong base, such as sodium amide NaNH₂ to give an propynide anion

b) Reaction of propynide anion with Haloalkane)

an propynide anion is a strong base. An propynide anion is also a nucleophile; it has an unshared pair of electrons that it can donate to another atom to form a new covalent bond. In this instance, an propynide anion donates its unshared pair of electrons to the carbon of a methyl or primary haloalkane, and, in so doing, the propynide nucleophile replaces the halogen atom. This type of reaction is called a nucleophilic substitution. For example, treating sodium propynide with 1-bromomethane gives 2-butyne

 An important feature of this reaction is that new carbon-carbon bonds are made, allowing the construction of larger carbon backbones from smaller ones

c) Reduction of 2-butyne by Hydrogen)

Reduction of 2-butyne by one mole of Hydrogen in presence of pt as catalyst

d) Addition water to 2-butene) 

But-2-ene is an unsatrated compound with one double bond. . It undergoes addition reaction with water molecule when treated with acidulated water forming butan-2-ol

E) Oxidation of 2-butene) 

But-2-ene is oxidised by Na₂Cr₂O₇ in presence of H₂SO₄ forming 2-butanone

F) Reductive Amination)