Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 94220-38-9, name is 7-Chloro-5-methyl-1H-pyrazolo[4,3-b]-pyridine. This compound has unique chemical properties. The synthetic route is as follows. HPLC of Formula: C7H6ClN3
EXAMPLE 10 7-(4-Dimethylaminoanilino)-5-methyl-1H-pyrazolo[4,3-b]pyridine. (E10) STR23 7-Chloro-5-methyl-1H-pyrazolo[4,3-b]pyridine (1 g), freshly prepared 4-dimethylaminoaniline (0.8 g), and absolute ethanol (20 ml) were heated under reflux in dry conditions in an atmosphere of nitrogen for 18 h. The solvent was removed in vacuo, the solid obtained was suspended in water, and the pH was adjusted to 7.8. The solid was filtered off, washed with water and dried to yield the 7-(4-dimethylaminoanilino)-compound (1.3 g, 80%) which on crystallisation from ethanol gave pale-yellow needles m.p. 215-218. (Found: C, 67.2; H, 6.4: N, 26.4. C15 H17 N5 requires C, 67.4; H, 6.4; N, 26.2%), numax. 3400-2500 (N–H), 1625, 1590, 1529, 1030, 942 cm-1, delta (CF3 COOH) 2.80 (3H, s, 5-CH3), 3.58 (6H, s, N(CH3)2), 7.00 (1H, s, 6-H), 7.89 (4H, s, aromatic protons), 8.52 (1H, s, 3-H), 9.70 (2H, s, N? H2), total proton count 17.
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Reference:
Patent; Beecham Group p.l.c.; US4576952; (1986); A;,
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