A novel four-component reaction for the synthesis of functionalised dihydropyrimidinesElectronic supplementary information (ESI) available: 1H and 13C NMR data for 9 and 10. See http://www.rsc.org/suppdata/cc/b3/b308243a

Abstract
In a multi-component reaction (MCR) of a phosphonate, nitriles, aldehydes and isocyanates, N3-functionalised dihydropyrimidines can be synthesised efficiently via a Horner–Emmons/aza Diels–Alder pathway.