AQA A-Level Organic Synthesis Latest
2023 Already Passed
Alkane to Halogenoalkane ✔✔X2, UV light
Mechanism = free radical substitution
Halogenoalkane to Alkene ✔✔KOH, dissolved in ethanol and heated under reflux
Mec
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AQA A-Level Organic Synthesis Latest
2023 Already Passed
Alkane to Halogenoalkane ✔✔X2, UV light
Mechanism = free radical substitution
Halogenoalkane to Alkene ✔✔KOH, dissolved in ethanol and heated under reflux
Mechanism = Elimination
Alkene to Halogenoalkane ✔✔HX at room temperature
Mechanism = Electropholic Addition
Halogenoalkane to Alcohol ✔✔Warm NaOH/KOH, heated under reflux
Mechanism = Nucleophilic Substitution
Halogenoalkane to Nitrile ✔✔KCN, dissolved in ethanol and heated under reflux
Mechanism = Nucleophilic Substitution
Halogenoalkane to Primary Amine ✔✔Use a primary Halogenoalkane, excess ammonia and heat
Mechanism = Nucleophilic Substitutuon
Halogenoalkane to Secondary/Tertiary Amines, their Salts and Quaternary Ammonium Salts
✔✔Use a non primary Halogenoalkane and excess ammonia and heat
Mechanism = Nucleophilic Substitution
Nitrile to Primary Amine ✔✔LiAlH4 with a dilute acid
OR
H2 gas with a nickel catalyst at a high temperature
Reaction type = Reduction
Alkene to Dibromoalkane ✔✔This is the test for an Alkene.
Add bromine water at room temperature
Solution will decolourise if Alkene is present.
Alkene to Alcohol ✔✔H3PO4 catalyst, steam at 300 deg at 60 atm
Reaction type = Hydration
OR
H2O with a cold H2SO4 catalyst
Mechanism = electrophilic Addition
Alcohol to Alkene ✔✔Concentrated H2SO4 heated under reflux
Mechanism = Elimination
Alcohol to Aldehyde ✔✔Primary Alcohol, acidified potassium dichromate and heated under
distillation
Reaction type = Oxidation
Alcohol to Ketone ✔✔Secondary Alcohol, acidified potassium dichromate and heated under
reflux
Reaction type =
Oxidation
Aldehyde/Ketone to Alcohol ✔✔NaBH4, in Water with Methanol
Mechanism = Nucleophilic Addition
Aldehyde to Carboxylic Acid ✔✔Acidified potassium dichromate heated under reflux
Reaction type = Oxidation
Aldehyde/Ketone to Hydroxynitrile ✔✔KCN, H2SO4 at room temperature
Mechanism = nucleophilic Addition
Alcohol to Carboxylic Acid ✔✔Primary alcohol acidified potassium dichromate heated under
reflux
Reaction type = Oxidation
Ester to Carboxylic Acid ✔✔Dilute H2SO4 catalyst, H2O, heated under reflux
Reaction type = Acid Hydrolysis
OR
Dilute NaOH, heated under reflux
Reaction type = Base Hydrolysis
Carboxylic Acid to Ester ✔✔Alcohol, concentrated H2SO4 catalyst and heat
Reaction type =
Esterification
Acyl Chloride / Acid Anhydride to Carboxylic Acid ✔✔H20 at room temperature
Mechanism = Nucleophilic Addition Elimination
Acyl Chloride / Acid Anhydride to Ester ✔✔Alcohol at room temperature Mechanism =
Nucleophilic Addition Elimination
Acyl Chloride / Acid Anhydride to Primary Amine ✔✔NH3 at room temperature
Mechanism = Nucleophilic Addition Elimination
Acyl Chloride / Acid Anhydride to N-substituted Amide ✔✔Amine at room temperature
Mechanism = Nuclephilic Addition Elimination
Benzene to Nitrobenzene ✔✔Concentrated H2SO4, Concentrated HNO3 (to make the NO2+)
below 50 deg
Mechanism = Electrophilic Substitution (when attaching to benzene)
Benzene to Phenylketone ✔✔RCOCL, ALCL3 catalyst, heated under reflux and in a nonaqueous environment
Reaction type = Friedel-Crafts Acylation
Nitrobenzene to Aromatic Amine ✔✔Tin, Concentrated HCl, heated under reflux then add
NaOH
Reaction type = Reduction
Aromatic Amine to N-Phenylethanamide ✔✔CH3COCl, r.t.p
The test to distinguish between aldehyde and ketones ✔✔Tollen's reagent. If aldehyde is present
then a silver mirror will form on the test tube (silver precipitate)
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