作者:Hans Jürgen Veith、Markus Collas、Reinhold Zimmer
DOI:10.1002/jlac.199719970217
日期:1997.2
(S)-3-Methyl-N-(3-methylbutyl)pyrrolidine (1) and its antipode (R)-1 have been prepared by reduction of (S)-4,5-dihydro-3-methyl-2(3H)furanone (7) and dimethyl (R)-2-methylsuccinate (11), bromination thereof, and ring closure of the intermediates (S)-9 and (R)-9, respectively, with 3-methylbutylamine (10). An alternative synthesis of (R)-1 by mesylation of (R)-8 is also described. Both enantiomers of 1 were
(S)-3-甲基-N-(3-甲基丁基)吡咯烷(1)及其对映体(R)-1通过还原(S)-4,5-二氢-3-甲基-2(3)制备H)呋喃酮(7)和(R)-2-甲基琥珀酸二甲酯(11),其溴化以及分别用3-甲基丁胺(10)将中间体(S)-9和(R)-9闭环。通过(R)-8的甲基化合成(R)-1的一种方法。也进行了描述。两种对映体1均以极好的对映体过量获得(ee = 96%)。