Ruthenium Catalyzed C−C Bond Formation via Transfer Hydrogenation: Branch-Selective Reductive Coupling of Allenes to Paraformaldehyde and Higher Aldehydes
作者:Ming-Yu Ngai、Eduardas Skucas、Michael J. Krische
DOI:10.1021/ol800836v
日期:2008.7.3
Under the conditions of ruthenium-catalyzedtransferhydrogenation employing 2-propanol as the terminal reductant, 1,1-disubstituted allenes 1a- h engage in reductivecoupling to paraformaldehyde to furnish homoallylic alcohols 2a- h. Under identical transferhydrogenation conditions, 1,1-disubstituted allenes engage in reductivecoupling to aldehydes 3a- f to furnish homoallylic alcohols 4a- n. In