Palladium clay catalyzed regio- and stereospecific synthesis of β,γ-unsaturated acids by the carbonylation of allylic alcohols
✍ Scribed by Ruth Naigre; Howard Alper
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 434 KB
- Volume
- 111
- Category
- Article
- ISSN
- 1381-1169
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✦ Synopsis
Palladium acetate immobilized on montmorillonite is an effective catalyst for the carbonylation of secondary allylic alcohols with carbon monoxide, in the presence of triphenylphosphine and an acid promoter, affording P,y-unsaturated acids in 39-56% isolated yields. The reaction is regio-and stereospecific.
📜 SIMILAR VOLUMES
Ally1 alcohols can be efficiently carbonylated to /3,y-unsaturated acids or esters in dimethylacetamide (DMA) or MeOH/DMA mixtures under relatively mild conditions (8O"C, 50-100 atm) using a simple catalytic system consisting of palladium iodide in the presence of thiourea as ligand. In the case of
The First Stereoselective Palladium-Catalyzed Cyclocarbonylation of β,γ-Substituted Allylic Alcohols. -A catalytic method allowing the synthesis of α,β-substituted-γ-butyrolactones from the title alcohols in modest to good yields is presented. In most cases, this transformation occurs with complete
PdCl,( PPh,),, in combination with HCI, is highly active in the alkoxycarbonylation of cr$-ketocyclooletins to 3-oxocycloalkanecarboxylic acid esters. The reaction is region specific. The catalytic system is stabilized by addition of PPh,, which depresses the activity but prevents decomposition to i