The phosphorylation of 2-amino-4-phenylthiazole with phosphorous acid ester amide gave unusual product in relatively large yield. Obtained 1,3-Bis(4-phenylthiazol-2-yl)-2,4-bis(N,N-diethylamino)-1,3-diazo-2,4-diphosphetidine was characterised and its structure was determinated using single crystal X-ray diffraction.
Interesting feature of the structure of title compound is four-membered PNPN ring.