Oa. Attanasi et al., First preparation and reaction of polymer-bound 1,2-diaza-1,3-butadienes. A convenient entry to 4-triphenylphosphoranylidene-4,5-dihydropyrazol-5-ones, TETRAHEDR L, 40(52), 1999, pp. 9277-9280
The first general protocol for the preparation of different polymer-bound 1
2-diaza-1,3-butadienes is reported. The utility of these supported reagents
in the solid-phase synthesis of 4-triphenylphosphoranylidene-4,5-dihydropy
zol-5-ones by reaction with triphenylphosphine is presented. (C) 1999 Publi
shed by Elsevier Science Ltd. All rights reserved.