Process for preparing diketopyrrolopyrrole derivatives
US5919945A · kind A · utility
2Cited by
4References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 21, 1998 |
| Grant date | Jul 6, 1999 |
| Priority date | — |
| Expiry date | Jul 21, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B57/004
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
This disclosure relates to a process for preparing bis(hydroxymethyl)pyrrolopyrrole compounds of the formula wherein A.sub.1 and A.sub.2 are aryl radicals, by reacting a 1,4-diketopyrrolopyrrole with formaldehyde. The compound of formula (II) can be isolated or further reacted in a one pot synthesis to yield a compound of the formula ##STR1## wherein B.sub.1 and B.sub.2 are organic radicals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.