Electronic effects on the regioselectivity of nucleophilic attacks on π-allylpalladium complexes
✍ Scribed by Marcial Moreno-Mañas; Jordi Ribas
- Publisher
- Elsevier Science
- Year
- 1989
- Tongue
- French
- Weight
- 240 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0040-4039
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✦ Synopsis
S~~~WZY: A high regioselectivity has been observed in the palladia catalyzed allylation of "soft" nucleophiles (pentane-2,4-dione and 4-hydroxy-6methyl-2pyrone) when both allylic termini have the same steric requirements and different electronic features.
The palladium catalyzed allylation of proton active substrates is a powerful method of carbon-carbon bond formation. ls2 A conanon mechanistic feature for nucleophiles
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The structure and reactivity of various bis-allylpalladium complexes occurring as catalytic intermediates in important synthetic transformations have been studied by applying density functional theory at the B3PW91(DZ P) level. It was found that h 1 ,h 3 coordinated bis-allylpalladium complexes are
A novel palladium-catalyzed three-component polycondensation of 1,2,10,11dodecatetraene, 4,4 -diiodobiphenyl, and nucleophiles was carried out using various carbanions and amines as a nucleophilic part. The polymerization with various sodium diethyl malonates produced polymers in high yields. Partic