- Synthesis and reactivity of 5-polyfluoroalkyl-5-deazaalloxazines
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Reaction of 6-arylamino-1,3-dialkyluracils with anhydrides of polyfluorocarboxylic acids in the presence of pyridine and subsequent cyclization with concentrated H2SO4 gave the corresponding 1,3-dialkyl-5-(polyfluoroalkyl)pyrimido[4,
- Dudkin, Sergii,Iaroshenko, Viktor O.,Sosnovskikh, Vyacheslav Ya.,Tolmachev, Andrey A.,Villinger, Alexander,Langer, Peter
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supporting information
p. 5351 - 5361
(2013/08/23)
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- Two-step synthetic approach to 6-substituted pyrido[2,3-d]pyrimidine(1H,3H) -2,4-diones from 6-amino-, 6-alkylamino-, and 6-arylamino-1,3-dimethyluracils
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The Mannich reaction of 7-aryl-5,6-dihydropyrido[2,3-d]pyrimidines 3, easily accessible by condensation of 6-amino-1,3-dimethyluracil (1) with Mannich bases 2a-c, gives rise to a mixture of 7-aryl-6-(N,N-dimethylaminomethyl) pyrido[2,3-d]pyrimidines 6 and
- Bischoff, Kerstin,Girreser, Ulrich,Heber, Dieter,Schütt, Martin
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p. 486 - 494
(2007/10/03)
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- Synthesis of substituted uracils by the reactions of halouracils with selenium, sulfur, oxygen and nitrogen nucleophiles under focused microwave irradiation
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Under microwave irradiation, the nucleophilic substitution reactions of halouracils with selenium, sulfur, oxygen and nitrogen nucleophiles was complete within several minutes with yields up to 99%. The method using microwave irradiation is superior to th
- Fang, Woei-Ping,Cheng, Yuh-Tsyr,Cheng, Yann-Ru,Cherng, Yie-Jia
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p. 3107 - 3113
(2007/10/03)
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- New Synthesis of Alloxazine Derivatives
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Nitrosation of 6-anilino-1,3-dimethyluracils yields 1,3-dimethylalloxazine derivatives and the corresponding 5-oxides. Reduction of the N-oxides results in formation of the alloxazines. This reaction opens the way to difficultly accessible alloxazine deri
- Krasnov
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p. 115 - 119
(2007/10/03)
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- Ring closure reactions of cyclic 2-arylaminomethylene-1,3-diones
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5-Arylaminomethylene compounds such as 5-arylaminomethylenepyrimidine-2,4,6-triones 2 or 2-phenylaminomethylenephenalene-1,3-dione 13 cyclize by thermolysis via migration of the arylamino group to pyrimido[4,5-b]quinoline-2,4-diones 6 or 7-oxo-7H-naphtho[
- Van Tinh, Dang,Fischer, Michaela,Stadlbauer, Wolfgang
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p. 905 - 910
(2007/10/03)
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- Synthesis of 1,3-Dimethylpyrimidoquinoline-2,4(1H,3H)-diones (1,3-Dimethyl-5-deazaalloxazines) and Related Compounds via the Intramolecular Cycloaddition of Azahexatrienes
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Heating of 6-arylamino-1,3-dimethyluracils (IIa-e) with one-carbon reagents (dimethylformamide dimethylacetal, dimethylformamide-phophorous oxychloride, and triethyl orthoformate) afforded 1,3-dimethylpyrimidoqunoline-2,4(1H,3H)-diones (Va-e) via t
- Nishigaki, Sadao,Sato, Junko,Shimizu, Kayoko,Furukawa, Kiyoko,Senga, Keitaro,Yoneda, Fumio
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p. 142 - 149
(2007/10/02)
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