The general preparation of unsubstituted and 2-substituted 1-benzoselenopyrylium salts 4 from the selenochromen-4-ones 1 via the selenochromenes 2 or 3 is investigated. The properties associated with the stability of the selenopyrylium salts 4 are elucidated.
References
1.
This paper constitutes Part 15 in the series “Studies on Tellurium-Containing Heterocycles”, Part 14, SashidaH., Heterocycles, 2000, 53, 49.
2.
(a) SashidaH., KurahashiH., and TsuchiyaT., J. Chem. Soc., Chem. Commun., 1991, 802.
3.
SashidaH., ItoK., and TsuchiyaT., J. Chem. Soc., Chem. Commun., 1993, 1493.
4.
SashidaH., ItoK., and TsuchiyaT., Chem. Pharm. Bull., 1995, 43, 19
5.
SashidaH., SadamoriK., and TsuchiyaT., Synth. Commun., 1998, 28, 713
6.
SashidaH., and KawamukaiA., J. Heterocycl. Chem., 1998, 35, 165
7.
SashidaH., and YasuikeS., J. Heterocycl. Chem., 1998, 35, 725
8.
SashidaH., KurodaA., and TsuchiyaT., Chem. Commun., 1998, 767.
9.
SashidaH., Heterocycles, 1998, 48, 631
10.
SashidaH., Synthesis, 1999, 1866.
11.
SashidaH., Heterocycles, 2000, 53, 49.
12.
SashidaH., Synthesis, 1998, 745.
13.
SashidaH., and OhyanagiK., J. Chem. Soc., Perkin Trans. 1, 1998, 2123.
14.
SashidaH., and OhyanagiK., Heterocycles, 1999, 51, 17.
15.
SashidaH., and MinamidaH., J. Chem. Soc., Perkin Trans. 1, 1999, 1665.
