1. Tetrahedron Letters Volume 49, Issue 26, 23 June 2008, Pages 4099-4101
Unprecedented base-promoted cascade transformation of a pyrimidinone derivative into a novel tricyclic bis-diazepinone
Anatoly D. Shutaleva,Anastasia A. Fesenkoa, Dmitry A. Cheshkovb and Dmitry V. Goliguzova
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http://dx.doi.org/10.1016/j.tetlet.2008.04.136Preparation of 7-Alkyl-2,3,6,7-tetrahydro-4-alkyl-2-oxo- 1H-1,3-diazepine-5-carboxylates by Ring Expansion-Nucleophilic Addition
David A. Claremon*, Seth A. Rosenthal
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http://dx.doi.org/10.1055/s-1986-3174