Design of 1,2-dioxines with anti-Candida activity: aromatic substituted 1,2-dioxines
摘要:
In an ongoing effort to rationally design new antimicrobials, 47 new 1,2-dioxines have been synthesised. Broad antifungal structure-activity relationships governing aromatically substituted epoxy-1,2-dioxines 2 and 3 and their parent 1,2-dioxines 1 were assessed primarily against the pathogenic yeast, Candida albicans, with haemolytic activity of selected examples also reported. (c) 2007 Elsevier Ltd. All rights reserved.
A domino Kornblum-DeLaMare/aza-Michael reaction of 3,6-dihydro-1,2-dioxines and application to the synthesis of the ceramide transport inhibitor (±)-HPA-12
作者:Sarah V.A.-M. Legendre、Martyn Jevric、Julian Klepp、Christopher J. Sumby、Ben W. Greatrex
DOI:10.1016/j.tet.2017.11.010
日期:2018.3
A Kornblum-DeLaMare/aza-Michael reaction of 3,6-dihydro-1,2-dioxines with primary and secondary amines has been developed which affords 4-hydroxy-3-aminoketones. The aza-Michael products were reduced using non-selective NaBH4/MeOH or diastereoselective (up to 92:8) SnCl4/NaBH4 conditions yielding (1R*,3S*)-3-amino-1,4-diols in up to 97% and 70% yield respectively. The major reduction product was converted in two steps to (+/-)-HPA-12, which is an inhibitor of the cytosolic ceramide transporting protein. (C) 2017 Elsevier Ltd. All rights reserved.