16.1 Synthetic Routes Flashcards

1
Q

Alkene -> Haloalkane

A

Hydrogen halide at RTP (halogenation)

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2
Q

Alcohol -> Haloalkane

A

Substitution reaction
Heated under reflux
Sodium halide + H2SO4

(Hydrogen halide formed in situ, which reacts with alcohol to form haloalkane)

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3
Q

Alkane -> Haloalkane

A

Radical substitution
Halogen + UV

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4
Q

Alkene -> Alkane

A

H2, in the presence of Ni catalyst at 423K
Hydrogenation reaction

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5
Q

Haloalkane -> Alcohol

A

NaOH (Aq), heat under reflux
Hydrolysis (nucleophilic substitution)

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6
Q

Alcohol -> Alkene

A

Heated under reflux
Concentrated H3PO4
Dehydration elimination reaction

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7
Q

Alkene -> Alcohol

A

H2O (g) + H3PO4 / Phosphoric (V) acid Catalyst
300 degrees C, 60-70 atm
Hydration reaction

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8
Q

Primary alcohol -> Carboxylic acid

A

K2Cr2O7/H2SO4 + heat under reflux
Colour change orange -> green

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9
Q

Primary alcohol -> Aldehyde

A

K2Cr2O7/H2SO4 + heat gently, distil immediately
Colour change orange -> green

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10
Q

Secondary alcohol -> Ketone

A

K2Cr2O7/H2SO4 + Heat under reflux
Colour change orange -> green

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11
Q

Aldehyde -> Primary alcohol

A

Warmed in an aqueous solution with a reducing agent, e.g. Sodium tetrahybridoborate
NaBH4/H2O

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12
Q

Ketone -> Secondary alcohol

A

Warmed in an aqueous solution with a reducing agent, e.g. Sodium tetrahybridoborate
NaBH4/H2O

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13
Q

Aldehyde -> Hydroxynitrile

A

Sodium cyanide + sulfuric acid (H2SO4/NaCN)
Forms HCN, then CN- nucleophile in situ

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14
Q

Ketone -> Hydroxynitrile

A

Sodium cyanide + sulfuric acid (H2SO4/NaCN)
Forms HCN, then CN- nucleophile in situ

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15
Q

Acyl chloride -> Ester

A

Nucleophilic acyl substitution
Heat with alcohol or phenol under reflux

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16
Q

Acyl chloride -> carboxylic acid

A

Nucleophilic acyl substitution
Heat with water under reflux

17
Q

Acyl chloride -> amide

A

Nucleophilic acyl substitution
Heat with ammonia or amine under reflux, depending on target molecule.

18
Q

Acid anhydride -> Ester

A

Nucleophilic acyl substitution
Heat with alcohol/phenol under reflux.

19
Q

Acid anhydride -> Carboxylic acid

A

Nucleophilic acyl substitution
Heat with water under reflux.

20
Q

Acid anhydride -> amide

A

Nucleophilic acyl substitution
Heat with ammonia/amine under reflux.

21
Q

Ester -> carboxylic acid

A

Acid hydrolysis
Nucleophilic acyl substitution
Reflux with dilute aqueous acid

22
Q

Ester -> carboxylate salt

A

Saponification/alkaline hydrolysis
Heat with NaOH under reflux

23
Q

Primary Haloalkane -> Primary amine

A

Reagents: Excess ammonia, ethanol solvent, NaOH
Step 1: Primary haloalkane + ammonia -> alkylammonium salt
Step 2: Alkylammonium salt + NaOH -> primary amine + water + sodium halide

24
Q

Haloalkane -> Nitrile

A

Nucleophilic substitution
NaCN/KCN in ethanol solvent
Optionally heat under reflux to increase rate

25
Q

Nitrile -> Amine

A

React with 2 H2 (per nitrile group) in the presence of a nickel catalyst
High temperature and pressure

26
Q

Nitrile -> carboxylic acid

A

Hydrolysis reaction
Heat with dilute aqueous acid, e.g. HCl (aq)

27
Q

Amino acid -> Ester

A

React with alcohol and strong acid catalyst (Usually H2SO4)