Number | Date | Country | Kind |
---|---|---|---|
198 39 013 | Aug 1998 | DE |
Number | Name | Date | Kind |
---|---|---|---|
4701526 | Kobe et al. | Oct 1987 | |
4868302 | Schneider | Sep 1989 | |
4948890 | Schneider | Aug 1990 | |
5663338 | Ramert et al. | Sep 1997 |
Number | Date | Country |
---|---|---|
41 36 114 | May 1993 | DE |
0 267 594 | May 1988 | EP |
0 415 028 | Mar 1991 | EP |
Entry |
---|
Wilhelm Traube, Chem. Ber., 33, 1900, 1371-79.* |
J. H. Lister, “Purines”, Wiley-Interscience, New ork, 1971, p 33-34.* |
Roland K. Robins et al., “Purines. II. The Synthesis of Certain Purines and the Cyclization of Several Substituted 4,5-Diaminopyrimidines”, Synthesis of Purines and Cyclization of 4,5-Diaminopyrimidines, Jan. 20, 1953, pp. 263-266. |