HuagongsheHuagongshe Chemistry Print Report · For research reference only
rac-3,4-dihydro-2-ethynyl-2,5,7,8-tetramethyl-2H-1-benzopyran-6ol → HCID 15171842, compound
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | rac-3,4-dihydro-2-ethynyl-2,5,7,8-tetramethyl-2H-1-benzopyran-6ol | HCID 14478563 | — |
| Reactant | 2-Bromo-5-butylthiophene | HCID 15171840 | — |
| Product | HCID 15171842 | HCID 15171842 | — |
Reaction Steps
rac-3,4-Dihydro-2-ethynyl-2,5,7,8-tetramethyl-2H-1-benzopyran-6-ol, 2.3 g (10 mmol) was reacted with 2.4 g (11 mmol) of 2-bromo-5-butylthiophene under the conditions described in Example 15. Chromatography of the crude product over 100 g of silica gel and crystallization from petroleum ether yielded colorless crystals with m.p. 80°-82°.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US05132310 |
| Source dataset | uspto-grants-1992_07 |
| ORD ID | ord-08d7e7d6834d436db8330d9516c36ddc |
| Source note | uspto-grants-1992_07 |