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elaboration of the pyrrole ring onto a preformed pyrimidine bearing reactive functionalities at. C-4 and C-5.18,19,21 Another strategy has involved the formation
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22 Jun 2009 pointed out, bearing in mind derivatives 29-32, that the . 2.61 (s, 3H, CH3); IR ν cm-1: 3,114 (m, NH); 2,238 (w, C≡N); 1,692 (s, C=O); 1,325 (s
11 Jun 2013 Thus, only 3-aminobenzodithiazines 1r 1t, bearing substituents R2 with electron-donating effects were unsuitable for formation of intermediate
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