97672-51-0Relevant academic research and scientific papers
Synthesis of Sphingosines, 4. - Synthesis of erythro-Sphingosines via Their Azido Derivatives
Zimmermann, Peter,Schmidt, Richard R.
, p. 663 - 668 (2007/10/02)
The 2,4-O-protected D-threoses 3a and 3b were obtained from D-galactose and D-xylose, respectively, in two-step procedures.Wittig reaction in the presence of an excess of lithium bromide afforded the trans-enetriols 4aA, 4aB, and 4bA.Triflate activation of the unprotected 2-hydroxy group, azide group introduction, and cleavage of the O-protective groups yielded the azidosphingosines 6A,B which provide after azide group reduction the D-erythro-sphingosines 7A,B.For the glycosphingolipid synthesis through azidosphingosine glycosylation, compound 6A was transformed by 1-O tritylation, 3-O protection, and subsequent 1-O detritylation into the 3-O-protected azidosphingosines 11α-11γ.
