28048-96-6Relevant academic research and scientific papers
Borrowing hydrogen: Indirect "Wittig" olefination for the formation of C-C bonds from alcohols
Black, Phillip J.,Edwards, Michael G.,Williams, Jonathan M. J.
, p. 4367 - 4378 (2007/10/03)
The successful development of an indirect three-step domino sequence for the formation of C-C bonds from alcohol substrates is described. An iridium-catalysed dehydrogenation of alcohol 1 affords the intermediate aldehyde 2. The desired C-C bond can then be formed by a facile Wittig olefination, yielding the intermediate alkene 3. In the final step the alkene is hydrogenated to afford the indirect Wittig product, the alkane 4. The key to this process is the concept of borrowing hydrogen; hydrogen removed in the initial dehydrogenation step is simply borrowed by the iridium catalyst. Functioning as a hydrogen reservoir, the catalyst facilitates C-C bond formation before subsequently returning the borrowed hydrogen in the final step. Herein we present full details of our examination into both the substrate and reaction scope and the limitations of the catalytic cycle. Wiley-VCH Verlag GmbH & Co. KGaA, 2006.
Catalytic electronic activation: Indirect "Wittig" reaction of alcohols
Edwards, Michael G.,Williams, Jonathan M.J.
, p. 4740 - 4743 (2007/10/03)
Hydrogen atoms are borrowed during the in situ oxidation of the starting alcohol to the corresponding aldehyde and are subsequently returned in the hydrogenation of the alkene intermediate, which is formed by Wittig olefination of the aldehyde. This proce
