Remarkably efficient enantioselective titanium (IV)-(R)-H8-BINOLate catalyst for arylations to aldehydes by triaryl (tetrahydrofuran) aluminum reagents
KH Wu, HM Gau
文献索引:Wu, Kuo-Hui; Gau, Han-Mou Journal of the American Chemical Society, 2006 , vol. 128, # 46 p. 14808 - 14809
Novel asymmetric triarylaluminum AlAr3 (THF) additions to aldehydes catalyzed by 10 mol% of the titanium (IV) complex of (R)-H8-BINOL ligand are reported. The catalytic system is extremely efficient with reactions completing within 10 min. The system applies to the most diversified aldehydes to date, and more than 20 aldehydes were examined to afford diarylmethanols having an electron-donating or an electron-withdrawing group at the 2-, 3 ...