Process for preparing piperonal
US4157333A · kind A · utility
3Cited by
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17Claims
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Assignee
Inventors
Key dates
| Filing date | Dec 20, 1977 |
| Grant date | Jun 5, 1979 |
| Priority date | — |
| Expiry date | Dec 20, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D317/54
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for preparing piperonal which comprises the steps of reacting 1,2-methylenedioxybenzene with an N-alkylformanilide and a condensing agent comprising one or more compounds selected from the group consisting of phosgene, phosphorus oxychloride, phosphorus oxybromide, thionyl chloride, thionyl bromide, sulfuryl chloride, sulfuryl bromide, phosphorus trichloride, and phosphorus pentachloride, and then hydrolyzing the resulting reaction product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.