Hydroformylation of Unsaturated Dicarboxylic Esters with Rhodium Containing Catalysts
The regioselectivity observed in carbonyl-rhodium catalyzed hydroformylation of dimethyl itaconate (1a), which leads to the preferential formation of dimethyl 2-(formylmethyl)-butandioate (3a) is completely reversed by the modification of the catalyst with phosphanes resulting in the formation of d...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | deu |
| Published: |
Swiss Chemical Society
1986-11-01
|
| Series: | CHIMIA |
| Online Access: | https://www.chimia.ch/chimia/article/view/9759 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | The regioselectivity observed in carbonyl-rhodium catalyzed hydroformylation of dimethyl itaconate (1a), which leads to the preferential formation of dimethyl 2-(formylmethyl)-butandioate (3a) is completely reversed by the modification of the catalyst with phosphanes resulting in the formation of dimethyl 2-formyl-2-methyl-butandioate (2a). Only the hydrogenation reaction was observed under «oxo» conditions for the isomeric dimethyl mesaconate (1b) or dimethyl citraconate (1c). A low enantioface discrimination involving the same face both for hydrogenation and hydroformylation is found in the reaction of 1a using the chiral ligand (R,R)-2,2-dimethyl-4,5-(diphenylphosphinomethyl)-1,3-dioxolane (DIOP).
|
|---|---|
| ISSN: | 0009-4293 2673-2424 |