Selective deprotection of tethered glycoderivatives with unsaturated spacer
摘要:
A double regioselective deprotection of symmetrical tethered isopropylidenated monosaccharides has been elaborated. This mild and simple methodology involving iodine and acetonitrile, allows breaking of dioxolane and dioxane moieties and affords new chiral structures in good yields. Spectroscopic characterization of these molecules includes FTIR, ESI-MS, H-1 and C-13 NMR, and also 2D-COSY, HMQC and HMBC measurements.
Tethered Glycoderivatives with Unsaturated Spacer: Synthesis and Characterization
摘要:
Williamson coupling of diisopropylidenated monosaccharides with trans-1,4-dibromo-2-butene gave five butenylene-bridged glycoderivatives. Their spectroscopic characterization includes infrared, mass, H-1 and C-13 NMR, correlation spectrometry, and heteronuclear multiple bond and quantum correlation measurements. This work is part of our effort to obtain chiral building blocks for the synthesis of bolaform and gemini-type surfactants with enhanced biodegradability and biocompatibility.