[amrhamed]

I am looking for help in the synthesis of the following cpd

The idea is dependent on N,N-Dimethylacetamide dimethyl acetal

I have abstract for this paper

Cationic 1,3-diazadienes in annulation reactions. Synthesis of pyrimidine, thiadiazine dioxide and triazine derivatives.
Landreau, Cyrille; Deniaud, David; Reliquet, Alain; Reliquet, Francoise; Meslin, Jean Claude. Laboratoire de Synthese
Organique, UMR CNRS 6513, Faculte des Sciences et des Techniques, Nantes, Fr. Journal of Heterocyclic Chemistry (2001),
38(1), 93-98. Publisher: HeteroCorporation, CODEN: JHTCAD ISSN: 0022-152X. Journal written in English. CAN 135:33464
AN 2001:223206

Triazapentadienium iodides Me2NCR1:NC(SMe):NH.HI [R1 = H, Me], prepd. from Me2NCR1:NCSNH2, are efficient intermediates
in heterocyclic synthesis. They react with ketenes, sulfenes, Ph isocyanate or isothiocyanate and di-Me acetylenedicarboxylate
affording dihydropyrimidinones, thiadiazine dioxides, triazinones, triazinethiones, and pyrimidines.

It is easy to substitute the SMe in the final compound .??Isn't it?