Synthesis of D-erythro-sphingomyelin and of D-erythro-ceramide-1-phosphoinositol
摘要:
3-0-Silyl-protected azidosphingosine 3, readily available from D-erythro-azidosphingosine, is transformed into ceramidyl phosphite derivative 5 which is a versatile building block for the synthesis of ceramide-1-0-phosphate and derivatives. This is exhibited for the synthesis of the title compounds 1 and 2.
The readily available 2,3:4,5-di-O-cyclohexylidene-D-myo-inositol derivative 3 was converted into the 1-O-unprotected D-myo-inositol derivative 6. Reaction with the phosphite derivative 7 of 3-O-tert-butyldimethylsilyl-protected ceramide furnished the target molecule D-erythro-ceramide-1-phosphoinositol (1). Reaction of O-(3,4,6-tri-O-acetyl-2-azido-β-D-glucopyranosyl)trichloroacetimidate (20) with
Unprotected myo-inositol was treated with various electrophiles, such as aroyl chlorides, tosyl chloride and tert-butyldiphenylsilyl chloride in a solution of LiCl/DMA or DMSO to afford regioselectively l,3-di-O-substituted or racemic 1-O-substituted derivatives, depending on a quantity of reagents and reaction time. alpha-Unbranched alkanoic acid anhydrides in LiCl/DMA in the presence of triethylamine were suitable for acylation of myo-inositol, in contrast to the fact that acylation using alkanoyl chlorides in aprotic polar solvents generally does not proceed well due to decomposition of the reagents by the reaction with the solvents. (C) 2013 Elsevier Ltd. All rights reserved.
Synthesis of D-erythro-sphingomyelin and of D-erythro-ceramide-1-phosphoinositol
作者:Bernd Kratzer、Thomas G. Mayer、Richard R. Schmidt
DOI:10.1016/s0040-4039(00)91820-3
日期:1993.10
3-0-Silyl-protected azidosphingosine 3, readily available from D-erythro-azidosphingosine, is transformed into ceramidyl phosphite derivative 5 which is a versatile building block for the synthesis of ceramide-1-0-phosphate and derivatives. This is exhibited for the synthesis of the title compounds 1 and 2.
The regioselective synthesis of enantiomerically pure myo-inositol derivatives. Efficient synthesis of myo-inositol 1,4,5-trisphosphate.
tonate and then acylation with (−)-menthyl chloroformate. Diastereomerically pure 1-O-(−)-menthoxycarbonyl-myo-inositol 1 can be used as starting material for the preparation of biologically important myo-inositol phosphates and glycosyl phosphatidylinositols in a shorter and effective way.