HuagongsheHuagongshe Chemistry Print Report · For research reference only
Triethylamine → 4-[5-Methoxy-3-methylbenzothiazolinylidene]-3-methyl-1-phenylpyrazolin-5-on
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Triethylamine | HCID 8471 | — |
| Reactant | 1H-Pyrazol-5-ol, 3-methyl-1-phenyl- | HCID 70335 | — |
| Reactant | 5-Methoxy-2-methylthio-3-methylbenzothiazolium tosylate | HCID 86745612 | — |
| Solvent | Methanol | HCID 887 | — |
| Product | 4-[5-Methoxy-3-methylbenzothiazolinylidene]-3-methyl-1-phenylpyrazolin-5-on | HCID 86745613 | — |
Reaction Steps
3-Methyl-1-phenylpyrazolin-5-one (1.74 g, 0.01 mol) was mixed with 3.97 g (0.01 mol) 5-methoxy-2-methylthio-3-methylbenzothiazolium tosylate in 25 ml methanol. Triethylamine (1.01 g, 0.01 mol) was added. The mixture was stirred for 3.5 hours, then filtered and washed with methanol. After drying the yield was 276 g (79%), mp 155°-156° C., λmax=386 (ε=25,000).
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US05102781 |
| Source dataset | uspto-grants-1992_04 |
| ORD ID | ord-5ddf10501a9142da9f7d5ad3f0804a4a |
| Source note | uspto-grants-1992_04 |