Talik, Tadeusz; Talik, Zofia published the artcile< Nitraminopyridines. II. Reactions of nitraminomethylpyridines with phosphorus halides>, Formula: C6H7N3O2, the main research area is nitramino pyridines; pyridines nitramino.
Reactions of 2-(nitramino)pyridines and 4-(nitramino)pyridines with PCl3, PCl5, PBr3, PBr5, and PI3 were studied. The nitramino group was easily exchanged for Cl, Br, or iodine. A series of chloro-, bromo-, and iodopicolines was prepared The following pyridine homologs were used as the starting material: 2-(nitramino)-3-methylpyridine (I), 2-(nitramino)-4-methylpyridine (II), 2-(nitramino)-5-methylpyridine (III), 2-(nitramino)-6-methylpyridine (IV), 4-(nitramino)-3-methylpyridine (V), 4-(nitramino)-2-methylpyridine (VI), 4-(nitramino)-2,6-dimethylpyridine (VII), and 3-(nitramino)-2,6-dimethylpyridine (VIII). The reactions were carried out in CHCl3 with 0.5 mole excess phosphorous halide at the boiling temperature Thus, a suspension of 0.01 mole nitraminomethylpyridine in 10 ml. CHCl3 was treated, under cooling, with 2.1 g. PCl3 then refluxed 1 hr., concentrated in vacuo, decomposed with ice, neutralized with NaHCO3 and steam distilled When extracted with Et2O, and the extract worked up, the distillate gave a halopicoline. The following compounds were reported (substrate, phosphones halide, product, m.p., b.p., and % yield given): I, PCl3, 2-chloro-3-methylpyridine, -, 193°, 24.1, and 2-chloro-5-nitro-3-methylpyridine (IX) 48°, -, 11.5; II, PCl3, 2-chloro-4-methylpyridine (X), -, 194°, 72.3; III, PCl3, 2-chloro-5-methylpyridine (XI), -, 86-7°/15 mm., 60.2; IV, PCl3, 2-chloro-5-nitro-6-methylpyridine (XII), 52°, -, 11.7, and 2-amino-3-nitro-6-methylpyridine (XIII), 141°, -, 6.7, and 2-amino-5-nitro-6methylpyridine, 188°, -, 13.3; V, PCl3, 4-chloro-3-methylpyridine (XIV), -, 164°, 60.2; VI, PCl3, 4-chloro-2-methylpyridine (XV), -, 162°, 72.3; VII, PCl3, 4-chloro-2,6-dimethylpyridine (XVI), -, 177°, 86.5; I, PCl5, IX, 47°, -, 26.6, and 2-amino-5-nitro-3-methylpyridine, 254°, -, 60.2; II, PCl5, X, -, 194°, 60.2; III, PCl5, XI, -, 87°/15 mm., 56.2; IV, PCl5, XII, 52°, -, 41.2, and XIII, 141°, -, 46.7; V, PCl5, XIV, -, 164°, 84.3; VI, PCl5, XV, -, 162°, 84.3; VII, PCl5, XVI, -, 177°, 86.5; I, PBr3, 2-bromo-3-methylpyridine (XVII), -, 209°, 48.5; II, PBr3, 2-bromo-4-methylpyridine (XVIII), -, 213°, 63.6, III, PBr3, 2-bromo-5-methylpyridine (XIX), 48°, -, 62.3; IV, PBr3, 2-bromo-5-nitro-6-methylpyridine (XX), 69°, -, 32.8, and 2-amino-3-nitro-6-methylpyridine (XXI), 141°, -, 20, and 2-amino-5-nitro-6-methylpyridine (XXII), 188°, -, 40; V, PBr3, PBr3, 4-bromo-3-methylpyridine (XXIII), -, 76°/15 mm., 77.1; VI, PBr3, 4-bromo-2-methylpyridine (XXIV), -, 181°, 62.3; VII, PBr3, 4-bromo-2,6-dimethylpyridine (XXV), -, 193°, 49.4; I, PBr5, XVII, -, 209°, 71.2; II, PBr5, XVIII, -, 212°, 62.3; III, PBr5, XIX, 48°, -, 62.3; IV, PBr5, XX, 69°, -, 9.4, and XXI, 141°, -, 33.3, and XXII, 188°, -, 40.0; V, PBr5, XXIII, -, 76°/15 mm., 44.5; VI, PBr5, XXIV, -, 181°, 44.5; VII, PBr5, XXV, -, 193°, 49.4; I, PI3, 2-iodo-3-methylpyridine, -, 105°, 27; II, PI3, 2-iodo-4-methylpyridine, -, 112°, 65; III, PI3, 2-iodo-5-methylpyridine, 52°, -, 69.9; V, PI3, 4-iodo-3-methylpyridine, 46°, -, 55.9; VI, PI3, 4-iodo-2-methylpyridine, 42°, -, 83.6; VII, PI3, 4-iodo-2,6-dimethylpyridine, 99°, -, 65.7. VIII did not react with phosphorus halides. Under the conditions employed, decomposition of VIII and formation of 3-amino-2,6-dimethylpyridine was observed.
Roczniki Chemii published new progress about Group 15 element halides, phosphorus halides Role: RCT (Reactant), RACT (Reactant or Reagent). 21901-29-1 belongs to class pyridine-derivatives, and the molecular formula is C6H7N3O2, Formula: C6H7N3O2.