HuagongsheHuagongshe Chemistry Print Report · For research reference only
2-Iodothiophene → (S)-3,4-Dihydro-2,5,7,8-tetramethyl-2-[(2-thienyl)ethynyl]-2H-1-benzopyran-6-ol
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | 2-Iodothiophene | HCID 18921 | — |
| Reactant | (S)-2-ethynyl-3,4-dihydro-2,5,7,8-tetramethyl-2H-1-benzopyran-6-ol | HCID 9859440 | — |
| Product | (S)-3,4-Dihydro-2,5,7,8-tetramethyl-2-[(2-thienyl)ethynyl]-2H-1-benzopyran-6-ol | HCID 15171811 | — |
Reaction Steps
This enantiomer was obtained as described in Example 4 by reacting the (S)-3,4-dihydro-2-ethynyl-2,5,7,8-tetramethyl-2H-1-benzopyran-6-ol from Example 11 with 2-iodothiophene. It was isolated by chromatography as above and was crystallized from ether/hexane to yield colorless crystals with m.p. 131°-134° C. [α]D25 =+34.9° (c=1.145 in MeOH).
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US05260294 |
| Source dataset | uspto-grants-1993_11 |
| ORD ID | ord-d6d337da984d4863b978dfb806adf55f |
| Source note | uspto-grants-1993_11 |