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- W2031402018 abstract "Abstract PEG‐supported aqueous flow synthesis coupled with ultrafiltration as the separation technique has been investigated for the first time. This strategy was applied to the preparation of new 3,4‐dihydropyrimidin‐2(1 H )‐ones, tetrazoles and tetrahydro‐1,3‐oxazines from the same PEG‐linked aldehyde as case studies. Dihydropyrimidinones were prepared by a copper(II)‐catalysed Biginelli reaction whereas a new tetrazole‐containing compound was obtained by Baylis–Hillman reaction followed by reduction and 1,3‐dipolar cycloaddition. Finally, various new tetrahydro‐1,3‐oxazines were prepared by a four‐step synthesis, that is, Baylis–Hillman reaction, Michael addition of amines, cyclization with formaldehyde and hydrolysis of the linkage to PEG. The use of water during the synthesis and most of the purification steps, as well as the benefits of the flow process in terms of improved safety and heat transfer agree with the principles of green chemistry." @default.
- W2031402018 created "2016-06-24" @default.
- W2031402018 creator A5010436629 @default.
- W2031402018 creator A5018496967 @default.
- W2031402018 creator A5065919280 @default.
- W2031402018 creator A5080265681 @default.
- W2031402018 date "2012-02-22" @default.
- W2031402018 modified "2023-10-10" @default.
- W2031402018 title "Soluble Polymer-Supported Flow Synthesis: A Green Process for the Preparation of Heterocycles" @default.
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