Oa. Attanasi et al., Convenient access to new 2-selenazolin-4-one and 2-selenazoline derivatives from 1,2-diaza-1,3-butadienes, SYNLETT, (1), 2001, pp. 144-146
1,2-Diaza-1,3-butadienes easily react under very mild conditions with selen
oureas to afford 2-selenazolin-4-one derivatives and with selenobenzamide t
o achieve 2-selenazoline derivatives.