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• W2137247749 startingPage "1879" @default.
• W2137247749 abstract "Intramolecular condensation of the N-(4-amino-5-nitrosopyrimidin-4-yl)-2-chloroacetamide 2 led to the pteridinone N(5)-oxide 4, while treatment of 2 with Me3P yielded the 8-(chloromethyl)purine 3. A high-yielding [3+2] dipolar cycloaddition of the N(5)-oxide 4 to electron-poor dipolarophiles, followed by spontaneous N,O-bond cleavage, gave the C(6)-substituted pteridinones 8a–8d that were deprotected to provide the pteridine-4,7(3H,8H)-diones 9a–9d, constituting a new synthesis of pterinones possessing a functionalised side chain at C(6)." @default.
• W2137247749 created "2016-06-24" @default.
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• W2137247749 date "2008-10-01" @default.
• W2137247749 modified "2023-10-17" @default.
• W2137247749 title "Synthesis and Reactivity in [3+2] Cycloadditions of Isoxanthopterin<i>N(5)</i>-Oxides - A New Synthesis of 6-Substituted Pteridinediones" @default.
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• W2137247749 doi "https://doi.org/10.1002/hlca.200890201" @default.
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