91827-96-2Relevant academic research and scientific papers
Synthesis of benzo[b]chalcogenophenes fused to selenophenesviaintramolecular electrophilic cyclization of 1,3-diynes
Hellwig, Paola S.,Guedes, Jonatan S.,Barcellos, Angelita M.,Jacob, Raquel G.,Silveira, Claudio C.,Lenard?o, Eder J.,Perin, Gelson
supporting information, p. 596 - 604 (2021/02/06)
We describe herein an alternative and transition-metal-free procedure for the access of benzo[b]chalcogenophenes fused to selenophenesviaintramolecular cyclization of 1,3-diynes. This efficient protocol involves a double cyclization of 1,3-diynyl chalcogen derivatives promoted by the electrophilic species of organoselenium generatedin situby the oxidative cleavage of the Se-Se bond of dibutyl diselenide using Oxone in acetonitrile as solvent in an open-flask at 80 °C. In this study, 15 selenophenes with broad substrate scope were prepared in moderate to excellent yields (55-98%) with short reaction times (0.5-3.0 h).
Method for producing 1,2-benzisothiazol-3-ones
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, (2008/06/13)
A method for producing a 1,2-benzisothiazol-3-one, having the steps of carrying out a reaction of a 2-(alkylthio)benzaldehyde with a hydroxylamine to give a 2-(alkylthio)benzaldehyde oxime and carrying out a reaction of the 2-(alkylthio)benzaldehyde oxime with a halogenating agent; and a method for producing a 1,2-benzisothiazol-3-one, having the steps of carrying out a reaction of a 2-halobenzonitrile with an alkanethiol in a heterogeneous solvent system in the presence of a base to give a 2-(alkylthio)benzonitrile and carrying out a reaction of the 2-(alkylthio)benzonitrile with an halogenating agent in the presence of water.
Cyclic Nucleotide Phosphodiesterase Inhibition by Imidazopyridines: Analogues of Sulmazole and Isomazole as Inhibitors of the cGMP Specific Phosphodiesterase
Coates, William J.,Connolly, Brendan,Dhanak, Dashyant,Flynn, Sean T.,Worby, Angela
, p. 1387 - 1392 (2007/10/02)
The synthesis and phosphodiesterase (PDE) inhibitory profile of a series of imidazopyridines, including sulmazole and isomazole, on separated PDE isoenzymes are described.The results show that both sulmazole and isomazole are weak inhibitors of PDE III, and their inotropic activity is unlikely to be due to PDE III inhibition alone.Surprisingly, both compounds were found to be significant inhibitors of the cGMP specific isoenzyme, PDE V, and a series of simple 2-substituted phenylimidazopyridines have been made to investigate the SAR of PDE activity.This has been shown to be sensitive to chain length, polarity, and the nature of the heteroatom linking group.Potent PDE V inhibitors, many of which are also significant inhibitors of PDE IV, have been identified.
