International Scholarly Research Notices

Research Article

Linear and Angular Distyrylpyrazines with Terminal Donor Groups: Synthesis, Solvatochromism, and Acidochromism of the Electronic Spectra

Table 1

Substitution pattern of linear and angular distyrylpyrazines.
EntryR1R2R3YieldColorm.p.
1HHH55%yellow225°C
2(β-pyridyl)HH64%whitish230°C
3HOCH3H11%yellow231°C
4OCH3OCH3H49%yellow225°C
5OCH3OCH3OCH333%,orange219°C
6H9-CarbazolylH4%yellow266°C
7N-PhenylindoloN-PhenylindoloH19%yellow250°C dec.
8HOCH3H34 %yellow169°C
9OCH3OCH3H41%yellow208°C
10OCH3OCH3OCH339%yellow206°C