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• W2071594229 abstract "Abstract Selective synthesis of 2,4‐diaryl‐2,3‐dihydro‐3 H ‐naphtho[1,2‐ e ]‐1,3‐oxazines and Schiff bases (( E )‐[1‐arylmethyl(benzylideneamino)]naphth‐2‐ols) that contain two identical or two different aryl substituents was achieved through one‐pot synthesis with ammonium acetate. From the proposed mechanism the dual role of ammonium acetate was identified. The synthesized products were characterized by 1 H and 13 C NMR spectroscopy, as well as FTIR and mass spectrometry. Crystal structures of the 1,3‐oxazines and Schiff base derivatives were examined. A notable feature is the conspicuous absence of strong donors (NH/OH) in any intermolecular hydrogen‐bonding scheme. Instead, packing is characterized by weak intermolecular CH⋅⋅⋅O, CH⋅⋅⋅π and CCl⋅⋅⋅π interactions, which lead to dimeric and zig‐zag one‐dimensional molecular patterns. The oxazine moiety of the tricyclic ring system predominantly adopts a half‐chair conformation. The present Mannich procedure is an environmentally benign and cost‐effective method for the preparation of industrially and pharmaceutically useful heterocyclic scaffolds." @default.
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• W2071594229 date "2012-08-06" @default.
• W2071594229 modified "2023-10-18" @default.
• W2071594229 title "Selective Synthesis and Structural Confirmation of 1,3-Oxazines and Schiff Bases with Controllable Substitution Patterns" @default.
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• W2071594229 doi "https://doi.org/10.1002/ajoc.201200027" @default.
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