作者: Masatoshi Asami , Naomichi Miyairi , Yukihiro Sasahara , Ken-ichi Ichikawa , Naoya Hosoda
DOI: 10.1016/J.TET.2015.07.031
关键词: 1-Phenylethylamine 、 Pyrrolidine 、 Chemistry 、 Diethylzinc 、 Benzaldehyde 、 Catalysis 、 Organic chemistry 、 Cyclohexanone 、 Enantioselective synthesis
摘要: Abstract A series of o-xylylene-type 1,4-amino alcohols, synthesized from (R)-1-phenylethylamine, were used as chiral ligands for the enantioselective addition diethylzinc to benzaldehyde. (S)-1-Phenyl-1-propanol was obtained with high enantioselectivity in all cases since stereochemical outcome reaction controlled by benzylic carbon bearing amino group. Highest catalytic activity using (R)-1-{2-[1-(pyrrolidin-1-yl)ethyl]phenyl}cyclohexan-1-ol (1n) derived (R)-1-(1-phenylethyl)pyrrolidine and cyclohexanone. Various secondary alcohols aldehydes presence 1n within 2 h good enantioselectivities.