Well-defined
palladium precatalysts have become increasingly important
in cross-coupling chemistry. Despite the wide choice of complexes
available today, palladium(0) compounds bearing Buchwald’s
biaryl phosphines are still under-represented. We present here an
efficient and facile synthesis of biaryl phosphine palladium(0) complexes
supported by a divinyltetramethyldisiloxane (dvtms) ligand. Starting
from commercially available [Pd(allyl)Cl]2, a variety of
[Pd(L)(dvtms)] complexes can be accessed in high yields under mild
reaction conditions. Their catalytic activity was tested in Buchwald–Hartwig
couplings and found to be very good for both (hetero)aryl bromides
and chlorides.
A machine learning-based tool that provides conditions and predicted yields for Buchwald-Hartwig couplings from a ChemDraw™ structure input is described. The tool is built on an in-house generated experimental dataset that explores a diverse network of reactant pairings. To minimize the number of experiments necessary to produce models and maximize data value, a workflow based on unsupervised machine leaning tools was created. The workflow enables the construction of models which can successfully generalize—making predictions for reactants which are not represented in the dataset.
A machine learning-based tool that provides conditions and predicted yields for Buchwald-Hartwig couplings from a ChemDraw™ structure input is described. The tool is built on an in-house generated experimental dataset that explores a diverse network of reactant pairings. To minimize the number of experiments necessary to produce models and maximize data value, a workflow based on unsupervised machine leaning tools was created. The workflow enables the construction of models which can successfully generalize—making predictions for reactants which are not represented in the dataset.
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