Enantioselective Platinum-Catalyzed Silicon-Boron Addition to 1,3-Cyclohexadiene
作者:Martin Gerdin、Christina Moberg
DOI:10.1002/adsc.200505016
日期:2005.5
Silaboration of 1,3-cyclohexadiene in the presence of Pt(acac)2, DIBALH, and a phosphoramidite prepared from (S)-1,1′-bi-2-naphthol and diisopropylamine led to (1R,4S)-1-(dimethylphenylsilyl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2-cyclohexene with 70% ee. Chiral catalysts based on Ni gave no or essentially racemic product, whereas complexes containing Pd were inactive.