ChemInform Abstract: Microwave Thermolysis. Part 11. Clay‐Catalyzed Facile Cyclodehydration under Microwave: Synthesis of 3‐Substituted Benzofurans.

Meshram, H. M.; Sekhar, K. Chandra; Ganesh, Y. S. S.; Yadav, J. S.

doi:10.1002/chin.200049121

Cited by 3 publications

(4 citation statements)

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“…25 ppm in 1.65 mL) of this catalyst for the reduction. Under this condition, reactions proceeded well, and corresponding amines were produced in 80-90% isolated yields (Table 4, entries [28][29][30][31]. Figure 1 ESI represents reduction of 5-chloro-2-nitroanilide (orange color) to 4-chloro-o-phenylenediamine (gray color) under optimized reaction condition.…”

Section: Resultsmentioning

confidence: 94%

“…In recent years, catalytic hydrogenation of nitroaromatic compounds employing different noble transition metals such as Pd [12][13][14] and Au [15][16][17][18][19][20][21][22] was investigated well. Moreover, cheap alternative metals such as Fe [23][24][25][26][27][28][29][30][31][32], Zn [33][34][35][36][37][38], and Sn [39,40] have been widely used for reduction of nitro group. However, these reactions often require stoichiometric (or super stoichiometric) amounts of metals and/or harsh reaction conditions.…”

Section: U N C O R R E C T E D P R O O F Introductionmentioning

confidence: 99%

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Enhanced catalytic activity of natural hematite-supported ppm levels of Pd in nitroarenes reduction

2020

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Section: Resultsmentioning

confidence: 94%

Section: U N C O R R E C T E D P R O O F Introductionmentioning

confidence: 99%

Enhanced catalytic activity of natural hematite-supported ppm levels of Pd in nitroarenes reduction

2020

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“…The NMR spectra are in good agreement with the literature. 72 1 H NMR (500 MHz, CDCl 3 ): δ = 7.92 − 7.88 (m, 1H), 7.85 (s, 1H), 7.76 − 7.70 (m, 4H), 7.69 − 7.64 (m, 2H), 7.58 (d, J = 7.7 Hz, 1H), 7.51 − 7.45 (m, 2H), 7.38 (td, J = 7.8, 1.4 Hz, 2H), 7.34 (td, J = 7.5, 1.2 Hz, 1H). 13 C NMR (151 MHz, CDCl 3 ): δ = 156.0, 141.5, 140.8, 140.5, 131.2, 129.0, 128.0, 127.8, 127.6, 127.2, 126.6, 124.8, 123.2, 122.0, 120.6, 112.0.…”

Section: Methodsmentioning

confidence: 99%

Synthesis of benzofurans from the cyclodehydration of α-phenoxy ketones mediated by Eaton’s reagent

Zhou

et al. 2020

Journal of Chemical Research

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Cyclodehydration of α-phenoxy ketones promoted by Eaton’s reagent (phosphorus pentoxide–methanesulfonic acid) is used to prepare 3-substituted or 2,3-disubstituted benzofurans with moderate to excellent yields under mild conditions. The method provides a facile access to benzofurans from readily available starting materials such as phenols and α-bromo ketones. The reaction is highly efficient, which is attributed to the good reactivity and fluidity of Eaton’s reagent. The reaction can be applied to prepare naphthofurans, furanocoumarins, benzothiophenes, and benzopyrans.

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“…[1][2][3][4] Benzofurans have been the subject of the most extensive studies and numerous synthetic methods have been developed for them. [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] Compared to benzofurans, the reports on the synthesis of naphthofurans [21][22][23][24] are rather limited. Benzofuran derivatives have received considerable attention owing to their antifungal N-myristoyl transferase inhibitor activity 25 and their activity as potent non-steroidal reversible inhibitors of P-450 aromatase.…”

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confidence: 99%

Synthesis and biological study of some new naphtho[2,1-b]furan and related heterocyclic systems

Badr

El‐Dean

Moustafa

et al. 2006

Journal of Chemical Research

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In the reaction of 1-cyano-2-naphthol (4) or its sodium salt with different alkylating agent, the O-alkylated derivatives (5a-d) were produced which underwent ring closure reactions using sodium ethoxide solution to give aminonaphtho [2,1-b]furan derivatives (6a-d). Ethyl 3-aminonaphtho[2,1-b]furan-2-carboxylate (8) was reacted with formamide to afford naphtho[1',2' : 4,5]furo[3,2-d]pyrimidine (11) derivatives. The produced pyrimidino compound underwent various reactions to synthesise other heterocyclic compounds.

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ChemInform Abstract: Microwave Thermolysis. Part 11. Clay‐Catalyzed Facile Cyclodehydration under Microwave: Synthesis of 3‐Substituted Benzofurans.

Cited by 3 publications

References 0 publications

Enhanced catalytic activity of natural hematite-supported ppm levels of Pd in nitroarenes reduction

Enhanced catalytic activity of natural hematite-supported ppm levels of Pd in nitroarenes reduction

Synthesis of benzofurans from the cyclodehydration of α-phenoxy ketones mediated by Eaton’s reagent

Synthesis and biological study of some new naphtho[2,1-b]furan and related heterocyclic systems

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