1. For selected examples, see: Surleraux, D.L.N.G.; Vendeville, S.M.H.; Verschueren, W.G.; De Bethune, M.-P.T.M.M.G.; De Kock, H.A.; Tahri, A.; Erra Sola, M. WO 2002081478, 2002.
2. Black, L.A.; Cowart, M.D.; Gfesser, G.A.; Wakefiled, B.D.; Altenbach, R.J.; Liu, H.; Zhao, C.; Hsieh, G.C. WO 2009085945, 2009.
3. Hong, X.; Hughes, T.V.; Miller, N.A.; Miskowski, T.A.; Sehon, C.A. WO 2010080873, 2010.
4. Okuno, T.; Kouyama, N.; Hayashi, K. WO 2011096462, 2011.
5. The First Large-Scale Synthesis of MK-4305: A Dual Orexin Receptor Antagonist for the Treatment of Sleep Disorder