A-LevelChemistryOrganic synthesis9701/12 · Oct/Nov 2022 · Q371 Mark

Propyl propanoate can be synthesised in three steps using propanenitrile as the only organic starting material. In step 1, the nitrile is converted into compound X. In step 2, compound X is converted into compound Y. In step 3, compound Y is reacted with more of compound X to give propyl propanoate. CH3CH2CN →step 1 X →step 2 Y →step 3 CH3CH2CO2CH2CH2CH3 Which reagents are suitable for carrying out step 1 and step 2? [Table 37.1: step 1 and step 2 reagents]

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Astep 1 HCl(aq) step 2 conc. H2SO4

Bstep 1 HCl(aq) step 2 LiAlH4

Cstep 1 NaOH(aq) step 2 conc. H2SO4

Dstep 1 NaOH(aq) step 2 NaBH4

✓ Correct answer

B: step 1 HCl(aq) step 2 LiAlH4

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Topic: Organic synthesis, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2022 Paper 1 Variant 2, question 37.

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