[GRAPHICS]Efficient synthesis of a sphingomyelin methylene analogue, which was designed as a sphingomyelinase inhibitor, was stereoselectively achieved. The Hofmann rearrangement of the alpha-hydroxyethyl beta-hydroxy amide 4 followed by the intramolecular oxazolidinone ring formation was one of the key steps.
Synthesis of Sphingomyelin Carbon Analogues as Sphingomyelinase Inhibitors
The highly efficient and stereocontrolled syntheses of sphingomyelin carbon analogues 1 and 2 were achieved by effectively utilizing Hofmann rearrangement of enantiomerically pure beta-hydroxyamide 7, which was prepared by an asymmetric hydrogenation of alpha-acyl-gamma-butyrolactone 9 and ring opening with NH(3). Intermediary isocyanate 6 was selectively trapped with the vicinal hydroxy group in an
GraphicsSphingomyelin nitrogen analogue 1 was designed and synthesized as a sphingomyelinase inhibitor. The synthesis was established by continuous Hofmann rearrangement and Crutius rearrangement as key steps in constructing the 3-hydroxy-1,2-diamine structure in the backbone of 1. This analogue showed moderate inhibitory activity toward SMase isolated from B. cereus.