All-Carbon Quaternary Centers via Ruthenium-Catalyzed Hydroxymethylation of 2-Substituted Butadienes Mediated by Formaldehyde: Beyond Hydroformylation
作者:Tomas Smejkal、Hoon Han、Bernhard Breit、Michael J. Krische
DOI:10.1021/ja904124b
日期:2009.8.5
Ruthenium-catalyzedtransferhydrogenation of 2-substituted dienes 1a-i in the presence of paraformaldehyde results in reductivecoupling at the 2-position to furnish the hydroxymethylation products 3a-i, which embody all-carbon quaternary centers. Reductivecoupling of diene 1g to paraformaldehyde under standard conditions, but employing deuterio-paraformaldehyde, 2-propanol-d(8), or both, corroborated