A facile enantioselective synthesis of (S)-N-(5-chlorothiophene-2-sulfonyl)-β,β-diethylalaninol via proline-catalyzed asymmetric α-aminooxylation and α-amination of aldehyde
作者:Varun Rawat、Pandurang V. Chouthaiwale、Vilas B. Chavan、Gurunath Suryavanshi、Arumugam Sudalai
DOI:10.1016/j.tetlet.2010.10.029
日期:2010.12
enantioselective synthesis of the bioactive (S)-N-(5-chlorothiophene-2-sulfonyl)-β,β-diethylalaninol (1), a Notch-1-sparing γ-secretase inhibitor metabolite (with EC50 = 28 nM) effective in reduction of Aβ production in vivo, has been realized starting from readily available 3-pentanone. The key steps of the synthesis are proline-catalyzed α-aminooxylation and α-amination of aldehyde; the latter contributing
生物活性(S)-N-(5-氯噻吩-2-磺酰基)-β,β-二乙基丙氨醇(1),Notch-1保留的γ-分泌酶抑制剂代谢产物(EC 50 =从容易获得的3-戊酮开始已经认识到有效降低体内Aβ产生的28nM)。合成的关键步骤是脯氨酸催化的α-氨氧基化和醛的α-胺化。后者贡献了45.2%和98%ee的总产量。