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Article title

One-Pot Synthesis of Dibenz[b,f][1,4]oxazepines via Mg(ClO4)2-Catalyzed Ugi Four-Component Reaction and Microwave-Assisted Intramolecular SNAr

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EN

Abstracts

EN
A general one-pot synthesis of dibenz[b,f][1,4] oxazepine-11(10H)-carboxamides is described. The Ugi four-component reaction (U-4CR) of 2-aminophenols, cyclohexyl isocyanide, 2-chloro-5-nitrobenzaldehyde, and 2-bromobenzoic acids in MeOH in the presence of 25 mol% Mg(ClO4)2 at 30-40 .C for 22-95 h gave the linear Ugi products. The latter were treated with aqueous K2CO3 in MeOH under microwave heating at 120 .C for 10 min for promoting the intramolecular nucleophilic aromatic substitution (SNAr), affording the 6/7/6-fused tricyclic heterocycles in 61-85% yields.

Publisher

Year

Volume

1

Issue

1

Physical description

Dates

received
17 - 5 - 2014
accepted
20 - 6 - 2014
online
8 - 7 - 2014

Contributors

author
  • Laboratory of Asymmetric Catalysis and Synthesis, Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. of China
author
  • Laboratory of Asymmetric Catalysis and Synthesis, Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. of China
author
  • Laboratory of Asymmetric Catalysis and Synthesis, Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. of China

References

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Document Type

Publication order reference

Identifiers

YADDA identifier

bwmeta1.element.-psjd-doi-10_2478_dos-2014-0001
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