Highly Enantioselective Synthesis of (2<i>S</i>)-α-(Hydroxymethyl)-glutamic Acid by the Catalytic Michael Addition of 2-Naphthalen-1-yl-2-oxazoline-4-carboxylic Acid <i>tert</i><i>-</i>Butyl Ester
作者:Yeon-Ju Lee、Jihye Lee、Mi-Jeong Kim、Byeong-Seon Jeong、Jeong-Hee Lee、Taek-Soo Kim、Jihoon Lee、Jin-Mo Ku、Sang-sup Jew、Hyeung-geun Park
DOI:10.1021/ol050920s
日期:2005.7.1
[reaction: see text]. Highly enantioselective synthesis of a potent metabotropic receptor ligand, (2S)-alpha-(hydroxymethyl)-glutamic acid (2, HMG) was accomplished by the catalytic Michael addition of 2-naphthalen-1-yl-2-oxazoline-4-carboxylic acid tert-butyl ester (3b), using the phosphazene base, BEMP, in CH(2)Cl(2) at -60 degrees C in the presence of (S)-binaphthyl quaternary ammonium salt 4.
[反应:请参见文字]。有效的代谢型受体配体(2S)-α-(羟甲基)-谷氨酸(2,HMG)的高度对映选择性合成是通过2-萘-1-基-2-基-2-恶唑啉-4-羧酸的催化迈克尔加成反应完成的酸叔丁酯(3b),在(S)-联萘基季铵盐4存在下,在-60摄氏度下于CH(2)Cl(2)中使用磷腈碱BEMP。