HuagongsheHuagongshe Chemistry Print Report · For research reference only
Piperidine → 10-(2-Benzothiazolyl)-2,3,6,7-tetrahydro-1,1,7,7-tetramethyl-1H,5H,11H-(1)benzopyropyrano(6,7-8-I,j)quinolizin-11-one
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Piperidine | HCID 8082 | — |
| Reactant | Benzothiazol-2-YL-acetic acid ethyl ester | HCID 359796 | — |
| Reactant | 8-Hydroxy-1,1,7,7-tetramethyl-2,3,6,7-tetrahydro-1H,5H-pyrido[3,2,1-ij]quinoline-9-carbaldehyde | HCID 737089 | — |
| Solvent | Acetonitrile | HCID 6342 | — |
| Product | 10-(2-Benzothiazolyl)-2,3,6,7-tetrahydro-1,1,7,7-tetramethyl-1H,5H,11H-(1)benzopyropyrano(6,7-8-I,j)quinolizin-11-one | HCID 5112805 | 80.4% |
Reaction Steps
A mixture of 12.28 g of ethyl 2-(benzothiazolyl)acetate was refluxed with 15 g of 1,1,7,7-tetramethyl-8-hydroxy-9-formyljulolidine in 120 mL of acetonitrile containing 2 mL of piperidine as a base catalyst for 15 h. Upon cooling, the precipitated bright orange solid was filtered and washed with some acetonitrile to give 19 g (79% yield) of pure dye C-545T: m.p. 229-230° C.; Tg=100° C.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US06020078 |
| Source dataset | uspto-grants-2000_02 |
| ORD ID | ord-6bd31264e11c438d8fbe3ce87d8d95f3 |
| Source note | uspto-grants-2000_02 |