Process for the preparation of 7-substituted 3-alkyl-3H-isobenzofuran-1-one derivatives
US7528266B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 2007 |
| Grant date | May 5, 2009 |
| Priority date | — |
| Expiry date | Oct 19, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C63/70
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a first compound having the formulawherein R is halogen, R1S(O)n or (R1)2NC(X)O; R1 is C1-C8alkyl, C1-C8haloalkyl, aryl-C1-C8-alkyl or aryl; n is 0, 1, 2 or 3; X is O or S; and R3 is C2-C5alkyl or C1-C5haloalkyl, or a salt thereof. The present invention is also directed to a second compound having the formulawherein R is fluorine, bromine, iodine, R1S(O)n or (R1)2NC(X)O; R1 is C1-C8alkyl, C1-C8- haloalkyl, aryl-C1-C8alkyl or aryl; n is 0, 1, 2 or 3; X is O or S; and R2 is hydrogen, C1-C4alkyl or C1-C4haloalkyl, with the proviso that R1 is different from C1-C8 alkyl or aryl if X is S, R is different from iodine if R2 is methyl, and R is different from fluorine, bromine or iodine if R2 is hydrogen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.