Versatile Approach to Enantiopure 2,6-Disubstituted Piperidin-3-ol Framework: Application to the Total Synthesis of (+)-Deoxoprosopinine
作者:Qian Wang、N. André Sasaki
DOI:10.1021/jo0496291
日期:2004.7.1
efficient synthesis of enantiopure 2,6-disubstituted piperidin-3-ol 19 is developed featuring two key steps: (a) Julia olefination of (2R)-3-phenylsulfonyl-2-tert-butyloxycarbamoylpropanol benzyl ether 9B and (2R,3S)-2-tert-butyldiphenyl-3,4-O-isopropylidine-2,3,4-trihydroxybutyraldehyde 8 and (b) intramolecular N-alkylation. A straightforward asymmetric synthesis of (+)-deoxoprosopinine (2) from 19
开发了对映体纯的2,6-二取代哌啶-3-醇19的有效合成,该合成具有两个关键步骤:(a)(2 R)-3-苯基磺酰基-2-叔丁氧基氨基甲酰基丙醇苄醚9B和(2 R , 3 S)-2-叔丁基二苯基-3,4- O-异丙基-2,3,4-三羟基丁醛8和(b)分子内N-烷基化。描述了从19直接合成(+)-脱氧胸苷(2)的不对称现象,证明了这种新方法的多功能性。