4. Lily aldehyde (1) is an ingredient used in perfumery. Suggest a synthesis of 1,using an aldol condensation approach. The starting organic compounds are methyl 4-tert-butylbenzoate and propyne. You may use any other inorganic and/or organic reagents as long as they are relevant and applicable, but LIAIH4, aq NaOH, PCC,H2O2, DIBAH, Pd/C, R2BH, THF and H2 are key choices.

Fig: 1

Fig: 2