HuagongsheHuagongshe Chemistry Print Report · For research reference only
Diisopropylethylamine → 3-(Dimethylaminomethylene)-dihydrobenzo[b]pyran-2,4-dione
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Diisopropylethylamine | HCID 81531 | — |
| Reactant | DMF dimethylsulfate | HCID 11127270 | — |
| Reactant | 4-Hydroxycoumarin | HCID 54682930 | — |
| Solvent | Dichloromethane | HCID 6344 | — |
| Product | 3-(Dimethylaminomethylene)-dihydrobenzo[b]pyran-2,4-dione | HCID 67876817 | 44.5% |
Reaction Steps
This compound was prepared by the method of example 2, by stirring 4-hydroxycoumarin (5.0 g) and DMF-dimethylsulfate (10.0 g) with ethyldiisopropylamine (10 mL) in CH2Cl2 (100 mL) for 0.5 hour. Product was crystallized from ether-CH2Cl2 to obtain 3.01 g of tan crystals, mp 135°-140° with decomposition.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US05179093 |
| Source dataset | uspto-grants-1993_01 |
| ORD ID | ord-6b5a6a04cb284081934a69c3238507d0 |
| Source note | uspto-grants-1993_01 |