Polycyclic dioxaborin complexes
US3936488A · kind A · utility
1Cited by
3References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 17, 1974 |
| Grant date | Feb 3, 1976 |
| Priority date | — |
| Expiry date | Oct 17, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F5/022
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the production of partially saturated gamma-pyrones of the general formula I: ##SPC1## wherein R represents hydrogen, hydroxy, lower alkyl, or lower alkoxy and n represents 1 or 2, by reacting a suitably substituted tetralone (IIa) or indanone (IIb) with a boron trifluoride compound and acetic anhydride to obtain intermediate boron complexes III, which are reacted with a Vilsmeier reagent prepared from phosphorus oxychloride and dimethylformamide to obtain the partially saturated gamma-pyrones of formula I. The gamma-pyrones I have anti-allergy and anti-secretory activity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.