An easy route to 2-substituted-2,3-dihyd
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I. Forfar; J. Guillon; S. Massip; J.-M. Léger; C. Jarry; J.-P. Fayet
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Article
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2001
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Journal of Heterocyclic Chemistry
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English
⚖ 56 KB
## Abstract The isomeric 2‐substituted‐7(5)‐methyl‐2,3‐dihydro‐5(7)__H__‐oxazolo[3,2‐__a__]pyrimidin‐5‐ones **3a‐b** and 7‐ones **2a‐b,7a** were synthesized by cyclocondensation from the 5‐substituted‐2‐amino‐2‐oxazolines **1a‐b** with biselectrophiles. In boiling ethanol, the reaction of **1a‐b**