Aldehydes are between alcohols and carboxylic acids with respect to their oxidation level and show specific reactivity. Therefore they are highly interesting building blocks and intermediates for a large number of very interesting classes of reactions and compounds such as Wittig reaction, formation of secondary alcohols, heterocycles and semiaminals to name only a few.

• An Organotrifluoroborate-Based Convergent Total Synthesis of the Potent Cancer Cell Growth Inhibitory Depsipeptides Kitastatin and Respirantin; R. E. Beveridge and R. A. Batey; Org Lett 2014; 16: 2322-2325. doi:10.1021/ol500484f
• A Practical Total Synthesis of Hapalosin, a 12-Membered Cyclic Depsipeptide with Multidrug Resistance-Reversing Activity, by Employing Improved Segment Coupling and Macrolactonization†; C. Palomo, M. Oiarbide, J. M. García, A. González, R. Pazos, J. M. Odriozola, P. Bañuelos, M. Tello and A. Linden; J Org Chem 2004; 69: 4126-4134. doi:10.1021/jo0497499
• Stereoselective Nucleophilic Formylation and Cyanation of α-Alkoxy- and α-Aminoaldehydes; R. Fernández, E. Martín-Zamora, C. Pareja and J. M. Lassaletta; J Org Chem 2001; 66: 5201-5207. doi:10.1021/jo015711+
• Efficient Allylation of Aldehydes Promoted by Carboxylic Acids; G.-l. Li and G. Zhao; J Org Chem 2005; 70: 4272-4278. doi:10.1021/jo050186q
• Allylation of Aldehydes and Imines:  Promoted by Reuseable Polymer-Supported Sulfonamide of N-Glycine; G.-l. Li and G. Zhao; Org Lett 2006; 8: 633-636. doi:10.1021/ol0528235
• Asymmetric Induction in Hydrogen-Mediated Reductive Aldol Additions to α-Amino Aldehydes Catalyzed by Rhodium:  Selective Formation of syn-Stereotriads Directed by Intramolecular Hydrogen-Bonding; C.-K. Jung and M. J. Krische; J Am Chem Soc 2006; 128: 17051-17056. doi:10.1021/ja066198q
• Z-Selective Horner−Wadsworth−Emmons Reaction of Ethyl (Diarylphosphono)acetates Using Sodium Iodide and DBU; K. Ando, T. Oishi, M. Hirama, H. Ohno and T. Ibuka; J Org Chem 2000; 65: 4745-4749. doi:10.1021/jo000068x
• Barbier-Type Diastereoselective Allylation of α-Amino Aldehydes with an Enantiopure 2-Sulfinylallyl Building Block; F. Márquez, R. Montoro, A. Llebaria, E. Lago, E. Molins and A. Delgado; J Org Chem 2001; 67: 308-311. doi:10.1021/jo016068u
• Concise Approach toward Tetrazolo[1,5-a][1,4]benzodiazepines via a Novel Multicomponent Isocyanide-Based Condensation; R. S. Borisov, A. I. Polyakov, L. A. Medvedeva, V. N. Khrustalev, N. I. Guranova and L. G. Voskressensky; Org Lett 2010; 12: 3894-3897. doi:10.1021/ol101590w
• The Henry reaction: recent examples; F. A. Luzzio; Tetrahedron 2001; 57: 915-945. doi:http://dx.doi.org/10.1016/S0040-4020(00)00965-0