Organocatalytic Synthesis of Higher‐Carbon Sugars: Efficient Protocol for the Synthesis of Natural Sedoheptulose and d‐Glycero‐l‐galacto‐oct‐2‐ulose

ChemistryOpen

Oskar Popik¹  Dr. Monika Pasternak-Suder²  Dr. Sebastian Baś² 

[1] Institute of Organic Chemistry, Polish Academy of Sciences, Warsaw, Poland;Faculty of Chemistry, Jagiellonian University, Krakow, Poland

关键词: aldol reaction;    asymmetric synthesis;    carbohydrates;    natural products;    organocatalysis;   

DOI  :  10.1002/open.201500099

来源: Wiley

【 摘 要 】

Abstract

Herein we report a short and efficient protocol for the synthesis of naturally occurring higher-carbon sugars—sedoheptulose (d-altro-hept-2-ulose) and d-glycero-l-galacto-oct-2-ulose—from readily available sugar aldehydes and dihydroxyacetone (DHA). The key step includes a diastereoselective organocatalytic syn-selective aldol reaction of DHA with d-erythrose and d-xylose, respectively. The methodology presented can be expanded to the synthesis of various higher sugars by means of syn-selective carbon–carbon-bond-forming aldol reactions promoted by primary-based organocatalysts. For example, this methodology provided useful access to d-glycero-d-galacto-oct-2-ulose and 1-deoxy-d-glycero-d-galacto-oct-2-ulose from d-arabinose in high yield (85 and 74 %, respectively) and high stereoselectivity (99:1).

【 授权许可】

CC BY-NC-ND   
© 2015 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA.

Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.