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Kumulierte Ylide, XI. Umsetzung von Isocyanaten und Isothiocyanaten mit (2,2-Diethoxyvinyliden)triphenylphosphoran
Bestmann, Hans Juergen,Saalfrank, Rolf W.
, p. 2661 - 2664 (2007/10/02)
(2,2-Diethoxyvinylidene)triphenylphosphorane (8) reacts with isocyanates and isothiocyanates 1 to give 1,3-disubstituted 6,6-diethoxy-5,6-dihydro-5-(triphenylphosphoranylidene)-2,4(1H,3H)-pyrimidinediones and -dithiones 13, respectively.By boiling in acet
