Synthesis 2017; 49(02): 383-390
DOI: 10.1055/s-0036-1588089
paper
© Georg Thieme Verlag Stuttgart · New York

Development of an Amino Acid/Hydroxy Oxime Dual Catalyst System for Highly Stereoselective Direct Asymmetric Aldol Reactions in the Presence of Water

Moniruzzaman Mridha
a   Department of Natural Sciences, Holmgatan 10, Mid Sweden University, 851 70 Sundsvall, Sweden
b   Department of Chemistry – BMC, Uppsala University, 751 23 Uppsala, Sweden
,
Guangning Ma
a   Department of Natural Sciences, Holmgatan 10, Mid Sweden University, 851 70 Sundsvall, Sweden
,
Carlos Palo-Nieto
a   Department of Natural Sciences, Holmgatan 10, Mid Sweden University, 851 70 Sundsvall, Sweden
,
Samson Afewerki
a   Department of Natural Sciences, Holmgatan 10, Mid Sweden University, 851 70 Sundsvall, Sweden
c   Berzelii Center EXSELENT, The Arrhenius Laboratory, Stockholm University, 106 91 Stockholm, Sweden   Email: armando.cordova@miun.se   Email: acordova@organ.su.se
,
Armando Cordova*
a   Department of Natural Sciences, Holmgatan 10, Mid Sweden University, 851 70 Sundsvall, Sweden
c   Berzelii Center EXSELENT, The Arrhenius Laboratory, Stockholm University, 106 91 Stockholm, Sweden   Email: armando.cordova@miun.se   Email: acordova@organ.su.se
› Author Affiliations
Further Information

Publication History

Received: 30 August 2016

Accepted after revision: 11 October 2016

Publication Date:
04 November 2016 (online)


Dedicated to Prof. Dieter Enders on the occasion of his 70th birthday

Abstract

An eco-friendly dual catalyst system for stereoselective aldol reactions in the presence of water is described. It is based on the cooperative action of acyclic amino acids and H-bond donating hydroxy oxime catalysts. The synthetic utility of this dual catalyst system was further demonstrated by applying it as the key step in the expeditious and highly stereoselective total synthesis of d-lyxo-phytosphingosine (29% overall yield). Here the amino acid/hydroxy oxime system significantly accelerated the direct aldol reactions in the presence of water as compared to organic solvents. The stereo- and chemoselectivity were also significantly increased.

Supporting Information