De novo asymmetric syntheses of (+)-goniothalamin, (+)-goniothalamin oxide, and 7,8-bis-epi-goniothalamin using asymmetric allylations
摘要:
A highly enantio- and diastereoselective approach to either enantiomer of (+)-goniothalamin, (+)-goniothalamin oxide, and 7,8-bis-epi-goniothalamin oxide has been developed from achiral cinnamyl alcohol or cinnamaldehyde. The asymmetry of the synthesis was installed by means of a Krische or Leighton allylation. The remaining stereochemistry was installed by a diastereoselective epoxidation. (C) 2009 Elsevier Ltd. All rights reserved.
A stereocontrolled route to d-ribo-phytosphingosine and sphinganine from an achiral secondary homoallylic alcohol using Sharpless kinetic resolution
作者:Thongam Joymati Devi、Bishwajit Saikia、Nabin C. Barua
DOI:10.1016/j.tet.2013.03.057
日期:2013.5
A facile and efficient enantioselective route for the synthesis of d-ribo-phytosphingosine (1a) and sphinganine (1b) has been developed employing commercially available and cheap starting material trans-cinnamaldehyde 2. The synthetic strategy features the Sharpless kinetic resolution, regioselective epoxide opening and Wittig olefination as the key steps.
De novo asymmetric syntheses of (+)-goniothalamin, (+)-goniothalamin oxide, and 7,8-bis-epi-goniothalamin using asymmetric allylations
作者:Philip Harsh、George A. O'Doherty
DOI:10.1016/j.tet.2009.03.097
日期:2009.6
A highly enantio- and diastereoselective approach to either enantiomer of (+)-goniothalamin, (+)-goniothalamin oxide, and 7,8-bis-epi-goniothalamin oxide has been developed from achiral cinnamyl alcohol or cinnamaldehyde. The asymmetry of the synthesis was installed by means of a Krische or Leighton allylation. The remaining stereochemistry was installed by a diastereoselective epoxidation. (C) 2009 Elsevier Ltd. All rights reserved.