Process for preparation of isochroman and derivatives thereof
US7534812B2 · kind B2 · utility
0Cited by
5References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 26, 2006 |
| Grant date | May 19, 2009 |
| Priority date | — |
| Expiry date | Mar 19, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D311/76
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to an improved process for preparing compounds of formula 1 on an industrial scale,wherein R1, R2 and R3 are independently C1-6-alkyl, C2-6-alkenyl, C2-6-alkynyl or aryl; and R4 is H, OC1-6-alkyl, Oaryl, OH, C1-6-alkyl, halogen, CN or NO2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.