Abstract
Interaction of α,β-unsaturated ketones of furan series with thiosemicarbazide under basic catalysis leads to 3-furyl-2-thiocarbamoylpyrazolines since nitrous nucleophilic centre of a reagent is activated, whereas the products of intermolecular cyclization of thiosemicarbazones under conditions of acid activation of sulfureous nucleophile are spirocyclic furylmethylene-1,3,4-thiadiazolines.
References
1.
10.1016/j.mencom.2009.01.021_bib1
Klochkova
Izv. Vuzov. Khim. Khim. Tekhnol.,
2005
2.
10.1016/j.mencom.2009.01.021_bib2
Sazonov
Izv. Vuzov. Khim. Khim. Tekhnol.,
2005