+++Thanks_suprachemister_1 articlefrom tetrahedron

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Synthesis and reactivity of pyrrolo[3,2-d][1,3]oxazine-2,4-dione. Access to new pyrrolo[3,2-e][1,4]diazepine-2,5-diones
Tetrahedron (2014), 70, (31), 4631-4639

DOI:

http://dx.doi.org/10.1016/j.tet.2014.05.046

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http://www.sciencedirect.com/science/article/pii/S0040402014007261

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