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Ethynylogation of a chiral lipidic dialkynylcarbinol (DAC), identified as a lead for cytotoxicity against HCT116 cancer cells, is shown to typify the butadiynyl-alkynylcarbinol (BAC) unit as a new pharmacophore. The enantiomers of the internal BAC have been synthesized with 72–75% yield and 85% ee through the use of a modified Carreira reaction shown here for the first time to be compatible with butadiyne...
New phosphine-sulfide and phosphine-sulfoxide ligands were synthesized and tested in allylic alkylation. Their coordination mode with Palladium have been studied by analysis of the corresponding X-ray crystallographic structures. The most efficient ligands were prepared in enantiomerically pure form and were applied to the Pd-catalyzed asymmetric allylic alkylation providing enantioselectivities up...
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