58876-81-6Relevant articles and documents
Catalyst-Free One-Pot Access to Pyrazoles and Disulfide-Tethered Pyrazoles via Deamidative Heteroannulation of β-Ketodithioesters with Semicarbazide Hydrochloride in Water
Koley, Suvajit,Panja, Sumit Kumar,Soni, Sonam,Singh, Maya Shankar
supporting information, p. 1780 - 1785 (2018/03/21)
An operationally simple, mild, and catalyst-free one-pot protocol to access privileged pyrazoles and disulfide-tethered pyrazoles has been devised by [3+2] heteroannulation of β-ketodithioesters with semicarbazide hydrochloride in water under open air. The pH of the medium played a key role toward the selectivity switch, as refluxing in water led to the formation of pyrazoles, whereas addition of sodium acetate in water enabled the formation of disulfide-tethered pyrazoles. Notably, this protocol involves a tandem sequence of amination/cyclization/dehydration/hydrodesufurization/hydrolysis/deamidative reactions. A mechanistic rationale for this regio-/chemoselective domino reaction is outlined, which is well supported and validated by density functional theory calculations. (Figure presented.).
Synthesis of 2,4,6-trisubstituted pyrimidine and triazine heterocycles as antileishmanial agents
Sunduru, Naresh,Agarwal, Anu,Katiyar, Sanjay Babu,Nishi,Goyal, Neena,Gupta, Suman,Chauhan, Prem M.S.
, p. 7706 - 7715 (2007/10/03)
A series of 2,4,6 trisubstituted pyrimidines and triazines have been synthesized and screened for its in vitro antileishmanial activity profile in promastigote model. Nine compounds have shown >94% inhibition against promastigotes at a concentration of 10
