An Efficient, One-Pot Synthesis of 3-Alkyl or Aryl Sydnoneimines
摘要:
In a ''one-pot'' process, a variety of 3-alkyl and 3-aryl sydnoneimine hydrochlorides can be prepared in high yield, under mild conditions, by nitrosation of the corresponding aminoacetonitrile with isoamyl nitrite in diethyl ether followed by cyclization with HCl gas.
Condensed heterocyclic compounds, their production and use
申请人:Takeda Chemical Industries, Ltd.
公开号:US05498774A1
公开(公告)日:1996-03-12
A condensed heterocyclic compound of the general formula: ##STR1## wherein Q is a condensed heterocyclic group having a nitrogen atom in the bridgehead which is unsubstituted or substituted, X is a hydrogen atom or a group attached through C, O, S or N, and Y is an electron attractive group, or its salt which is useful as agricultural chemical.
Compounds of formula (I) and pharmaceutically acceptable salts thereof are provided. The compounds are useful as agents in the treatment of diseases and conditions, including inflammatory diseases, cancer, and AIDS. Pharmaceutical compositions comprised of one or more compounds of formula (I) are also provided.
Eleven imidazole diselenides derived from the naturally occurring family of antioxidants, the ovothiols, were synthetised by cyclisation of selenoamides with trimethylsilyltrifluoromethanesulfonate or refluxing of cyanoamines in a selenium/sodium borohydride mixture. These compounds were assayed for their glutathione peroxidase-like (GSH Px-like) activity and their capacity to be reduced by glutathione. The most active molecules of the series were 4 times more potent in the GSH Px-like test than the widely known reference compound, ebselen. This catalytic activity was mediated by the formation of the antioxidant selenol intermediate upon partial but significant exchange reaction with glutathione. (C) 2003 Elsevier Ltd. All rights reserved.