Synthesis of 2-phenoxybutanal from but-1-yne How can I convert 1-butyne to 2-phenoxybutanal as shown above? I thought of using a hydroboration-oxidation sequence to introduce the carbonyl group, but I do not know how to add the phenoxy substituent.
Water, BH3, H2O2, NaOH


This reaction, an hydroboration, yelds butanal


Br2, H2SO4


This reaction, carried without light, is an alpha carbon bromination, and yelds 2-bromobutanal


Sodium phenoxide


This is a simple Williamson Ether Synthesis, which yelds the final product