Ruthenium catalyzed C-C bond formation via transfer hydrogenation: Branch-selective reductive coupling of allenes to paraformaldehyde and higher aldehydes
(Chemical Equation Presented) Under the conditions of ruthenium-catalyzed transfer hydrogenation employing 2-propanol as the terminal reductant, 1,1-disubstituted allenes 1a-h engage in reductive coupling to paraformaldehyde to furnish homoallylic alcohol
Ngai, Ming-Yu,Skucas, Eduardas,Krische, Michael J.
supporting information; experimental part
p. 2705 - 2708
(2009/05/26)
NOVEL SYNTHESIS OF 2,3-DIARYLBUTA-1,3-DIENES FROM 1,4-DIMETHOXYBUTYNE-2
It was found that 2,3-diarylbuta-1,3-dienes were readily obtained in good to excellent yields through the SN-2' type substitution of 1,4-dimethoxybutyne-2 with aryl Grignard reagents in the presence of a copper(I) salt.