Both 1-and 2-Bromo(πallyl)palladium Complexes. -The regioselectivity of the nucleophilic attack of phenolates (II) to π-allyl(Pd) complexes generated from 1,3-and 2,3-dibromopropenes (I) and (V) are examined. The formation of (III) from the 1,3-dibromo derivative (I) involves a primarily attack at
New reactions involving palladacyclobutanes: The attack of phenoxide ion at the central carbon of both 1- and 2-bromo(π-allyl)palladium complexes
✍ Scribed by Michael G Organ; Michael Miller
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- French
- Weight
- 270 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0040-4039
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✦ Synopsis
Nucleophilic attack of phenoxide ion occurs primarily at the central carbon of halo-substituted (n-allyl)Pd complexes.
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48 h gave the saturated silanes 21,23, and 25 in greater than 90 % yields. Exceptionally high diastereoselectivities (> 500: 1) were noted in all cases. No desilylation was observed under these conditions. Table . Directed hydrogenation of y-hydroxyvinylsilanes. The substrate was treated with 5 mol
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