Regioselective reduction of fused pyrrolocarbazoles-5,7-diones
US8410267B2 · kind B2 · utility
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12Claims
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Key dates
| Filing date | May 11, 2011 |
| Grant date | Apr 2, 2013 |
| Priority date | — |
| Expiry date | Jul 20, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P35/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a method for regioselectively reducing the maleimide compounds of formula (I). The invention also relates to C7 hydroxy lactam regioisomers of formula (II) obtainable by this method and their use for the preparation of lactams of formula (III) which are particularly useful as intermediate for the synthesis of fused pyrrolocarbazoles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.