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IR spectra and structure of 6-methylimidazo[1,2-a]pyrimidine-2, 5-dione and its 3-ylidene derivatives

✍ Scribed by V. D. Orlov; B. E. Mandrichenko; V. F. Lavrushin


Book ID
112331447
Publisher
Springer US
Year
1976
Tongue
English
Weight
400 KB
Volume
12
Category
Article
ISSN
0009-3122

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The synthesis of 3,3-dimethylmorpholine-2,5-diones 4a was achieved conveniently via the direct amide cyclization of the linear precursors of type 3, which were prepared by coupling of 2,2-dimethyl-2H-azirin-3-amines 2 with 2-hydroxyalkanoic acids 1. Thionation of 4a with Lawessons reagent yielded th