+++2 Статьи J. Org. Chem & TL

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1)Eckhardt, Matthias; Hauel, Norbert; Langkopf, Elke; Himmelsbach, Frank;
Synthesis of 2-bromo-7-methyl-3,5-dihydro-imidazo[4,5-d]pyridazin-4-one and 3-alkyl-2-bromo-3,5-dihydro-imidazo[4,5-d]pyridazin-4-one and their selective elaboration
Tetrahedron Letters 49; 12; 2008; 1931 - 1934;

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http://dx.doi.org/10.1016/j.tetlet.2008.01.102

2)Abad, Jose-Luis; Gaffney, Barbara L.; Jones, Roger A.;
15N-Multilabeled Adenine and Guanine Nucleosides. Syntheses of [1,3,NH2-15N3]- and [2-13C-1,3,NH2-15N3]-Labeled Adenosine, Guanosine, 2‘-Deoxyadenosine, and 2‘-Deoxyguanosine
Journal of Organic Chemistry; 64; 18; 1999; 6575 - 6582;

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http://dx.doi.org/10.1021/jo982372k

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