HuagongsheHuagongshe Chemistry Print Report · For research reference only
Sodium Dithionite → Pyrazolo[1,5-A]pyridine-2,3-diamine
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Sodium Dithionite | HCID 24489 | — |
| Reactant | 4-Methoxybenzenediazonium | HCID 101828 | — |
| Reactant | Pyrazolo[1,5-a]pyridin-2-amine | HCID 21867001 | — |
| Product | Pyrazolo[1,5-A]pyridine-2,3-diamine | HCID 19743463 | — |
Reaction Steps
2.66 g. 2-Aminopyrazolo[1,5-a]pyridine (see Chem. Pharm. Bull., 21, 2146/1973) are reacted with p-methoxybenzenediazonium salt analogously to Example 12.3.1, the resultant azo compound is reduced with sodium dithionite and the crude product obtained is purified to give 2,3-diaminopyrazolo[1,5-a]pyridine; m.p. 190° C.; Rf =0.6 (silica gel, ligroin/acetone/glacial acetic acid 60:40:1 v/v/v).
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US05525480 |
| Source dataset | uspto-grants-1996_06 |
| ORD ID | ord-0684f11e6e4f427ea435aa381f06b066 |
| Source note | uspto-grants-1996_06 |