- Microwave-assisted synthesis of some novel fluorinated pyrazolo[3,4-d] pyrimidine derivatives containing 1,3,4-thiadiazole as potential antitumor agents
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A facile microwave-assisted procedure for synthesis of novel fluorinated pyrazolo[3,4-d]pyrimidine derivatives containing 1,3,4-thiadiazole is described. This protocol presented such advantages as short reaction time, high yields, simple purification and
- Song, Xin Jian,Shao, Yu,Dong, Xing Gao
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scheme or table
p. 1036 - 1038
(2012/06/30)
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- 3-Chlor-5-dimethylamino-2-formyl-4-aza-2,4-pentadiennitril, Synthese und Umsetzungen mit Nucleophilen
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3-Chloro-5-dimethylamino-2-formyl-4-aza-2,4-pentadienenitrile (7) is prepared by partial hydrolysis of the iminium perchlorate 1.In 7 the electrophilic centres (1, 3, 5) regioselectively react with secondary alkylamines, arylamines, and hydrazine derivatives to yield 3-amino-substituted formylazapentadienenitriles and (hydrazonomethyl)azapentadienenitriles.Intramolecular cyclisation leads to triazole betaines, pyrazoles, and 1,4-dihydropyrimidines.
- Klemm, Kurt,Pruesse, Wolfgang,Baron, Lothar,Daltrozzo, Ewald
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p. 2001 - 2018
(2007/10/02)
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