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Cited by 16 publications
(10 citation statements)
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References 21 publications
(19 reference statements)
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“…3‐Oxopentanedinitrile derivative 14 was utilized for preparation of various substituted five‐, six‐, and seven‐membered rings attached to the pyridothienopyrimidine nucleus via its treatment with hydroxylamine hydrochloride in N , N ‐dimethylformamide containing a catalytic amount of triethylamine, salicylaldehyde in ethanol and piperidine as a catalyst, and hydrazine hydrate in ethanol containing freshly fused sodium acetate to yield the corresponding 2(5‐aminoisoxazol‐3‐yl)acetonitrile 15 , 4 H ‐chromeno[2,3‐ b ]pyridin‐4‐one 16 , and 3,7‐diamino‐4 H ‐1,2‐diazepin‐5(6 H )one 17 derivatives, respectively. Spectroscopic data and elemental analyses of compounds 15 to 17 were in agreement with the predicted structures (see Section ).…”
Section: Resultsmentioning
confidence: 99%
“…3‐Oxopentanedinitrile derivative 14 was utilized for preparation of various substituted five‐, six‐, and seven‐membered rings attached to the pyridothienopyrimidine nucleus via its treatment with hydroxylamine hydrochloride in N , N ‐dimethylformamide containing a catalytic amount of triethylamine, salicylaldehyde in ethanol and piperidine as a catalyst, and hydrazine hydrate in ethanol containing freshly fused sodium acetate to yield the corresponding 2(5‐aminoisoxazol‐3‐yl)acetonitrile 15 , 4 H ‐chromeno[2,3‐ b ]pyridin‐4‐one 16 , and 3,7‐diamino‐4 H ‐1,2‐diazepin‐5(6 H )one 17 derivatives, respectively. Spectroscopic data and elemental analyses of compounds 15 to 17 were in agreement with the predicted structures (see Section ).…”
Section: Resultsmentioning
confidence: 99%
“…Figure 1 We have now developed a novel, versatile and convenient approach to fused thiazolopyrimidine derivatives to which the third ring is attached bridging the N-3 and S-2 positions. Also, the present work is an extension of our ongoing efforts [30][31][32][33][34][35] towards the development and identification of new molecules via aimed to synthesized some novel thiazolo, thiazino, benzothiazepen, thiazepen derivatives and screen them for antimicrobial activities. Compound 4 was used as a key compound for this study and for further synthesis of other fused heterocycles.…”
Section: Resultsmentioning
confidence: 99%
“…Furthermore, various substituted benzothiazoles such as 2-aryl benzothiazoles have received much attention because of their unique structures and uses as radioactive amyloid imagining agents [25] and anticancer agents [26]. In continuation of our interest in the synthesis of heterocycles containing a benzothiazole moiety [27][28][29][30], we report herein a facile route to several new benzothiazole-fused heterocyclic systems. We present efficient synthesis of novel pyrido [2,1-b] [1,3] benzothiazole, pyrimidopyrido [2,1-b] [1,3]benzothiazole, and benzothiazolo[3,2-a] [1,8] naphthyridine derivatives.…”
Section: Introductionmentioning
confidence: 99%