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. Author manuscript; available in PMC: 2016 Jun 3.
Published in final edited form as: Tetrahedron Lett. 2015 Jan 13;56(23):3420–3422. doi: 10.1016/j.tetlet.2015.01.060

Scheme 1.

Scheme 1

Synthesis of benzaldehyde 5. Reagents and conditions: (a) 3-bromo-2-methylprop-1-ene, K2CO3, DMF, microwave, 80 °C, 1.5h, 81%; (b) NMP, 200 °C, 8h, 65%; (c) formic acid (95%), reflux, 3h, 98%.