A stereoselective totalsynthesis of (+)-desoxoprosopinine starting from L-glutamic acid as a chiral source was accomplished, in which the intramolecular reaction of γ-aminoallylstannane with aldehyde was used as a key step.
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 asymmetricsynthesis 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。
A Short and Efficient Total Synthesis of (+)-Deoxoprosopinine via Diastereoselective Allylation of the Bicyclic N-Acyl Iminium Ion Formed in situ with a π-Nucleophile
A short and efficientsynthesis of (+)-deoxoprosopinine is reported involving Miyashita endoselective epoxide ring-opening reaction, diastereoselective allylation of the bicyclic N -acyl iminium ion formed in situ with a π-nucleophile, and olefin cross-metathesis as the key steps.
Asymmetric total syntheses of (+)-desoxoprosopinine and (-)-desoxoprosophylline were accomplished using L-glutamic acid as the chiral source, in which the intramolecular reaction of a gamma-aminoallylstannane with an aldehyde was used as a key step. (C) 1997 Elsevier Science Ltd. All rights reserved.
Chemoenzymatic preparation of trans-2,6-dialkylpiperidines and of other azacycle building blocks. Total synthesis of (+)-desoxoprosopinine
作者:Marco A. Ciufolini、Cynthia W. Hermann、Kenton H. Whitmire、Norman E. Byrne