- 2-Ferrocenyl-2-thiazoline as a building block of novel phosphine-free ligands
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New 1,2-disubstituted ferrocenes [5(b-j), in which R = -SMe, -SPh, -SiPr, -SiMe3, -SePh, -SnBu3, -B(OH)2, -Me, -I] with a thiazoline ring in the ferrocene backbone using as key intermediate a ferrocenyl Fischer carbene complex were synthesized. The capability of the 2-thiazoline moiety as an ortho-directed metalation group was demonstrated by subsequent quenching of lithium intermediate with several electrophiles, proving to be an excellent method for synthesizing bidentate ligands. The catalytic scope of the [N,S] ligand 5b as the corresponding palladium complex 5b-PdCl 2 in a microwave-promoted Heck reaction was also tested. Results obtained showed better catalytic activity of 5b-PdCl2 compared to other catalytic systems based on a [N,S] ferrocenyl ligand. The Royal Society of Chemistry.
- Corona-Sánchez, Ricardo,Toscano, Rubén A.,Ortega-Alfaro, M. Carmen,Sandoval-Chávez, César,López-Cortés, José G.
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p. 11992 - 12004
(2013/09/02)
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- The Determination of Inductive Effects by 13C Nuclear Magnetic Resonance Spectrometry
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A series of meta- and para-XCH2-substituted methyl cinnamates has been prepared and the 13C n.m.r. chemical shifts of the α- and β-side-chain carbons have been determined in ethanol.In the majority of cases the magnitudes of the substituent-induced chemic
- Happer, Duncan A. R.,Steenson, Bruce E.
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p. 843 - 848
(2007/10/02)
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