HuagongsheHuagongshe Chemistry Print Report · For research reference only
Hexane → 6-Bromo-8-cyclopropyl-3,4-dihydro-4,4-dimethylspiro[2H-1-benzopyran-2,1'-cyclopropane]
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Hexane | HCID 8058 | — |
| Reactant | Diazomethane | HCID 9550 | — |
| Reactant | 6-Bromo-3 4-dihydro-4,4-dimethyl-8-vinylspiro[2H-1-benzopyran-2,1'-cyclopropane] | HCID 22568855 | — |
| Catalyst | palladium(II) acetate | HCID 167845 | — |
| Solvent | Diethyl Ether | HCID 3283 | — |
| Product | 6-Bromo-8-cyclopropyl-3,4-dihydro-4,4-dimethylspiro[2H-1-benzopyran-2,1'-cyclopropane] | HCID 22568911 | — |
Reaction Steps
Following general procedure O and using A 6-bromo-3,4-dihydro-4,4-dimethyl-8-vinylspiro[2H-1-benzopyran-2,1′-cyclopropane] (Intermediate 41 1.36 g, 4.6 mmol), a solution of diazomethane in diethyl ether and palladium (II)acetate (˜30 mg) followed by flash column chromatography over silica gel (230-400 mesh) using hexane as the eluent, the title compound was obtained as a clear oil (1.38 g, 100%).
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US06359135B1 |
| Source dataset | uspto-grants-2002_03 |
| ORD ID | ord-5dd7e228c5cc40cea6eba2b64043aaeb |
| Source note | uspto-grants-2002_03 |