Eight glucoside compounds were synthesized in 41.0-65.9% yields by reaction of 2,3,4,6-era-O-acetyl-α-D-glucopyranosyl bromide with corresponding phenols,using cetyltrimethyl ammonium bromide as a phase-transfer cata...Eight glucoside compounds were synthesized in 41.0-65.9% yields by reaction of 2,3,4,6-era-O-acetyl-α-D-glucopyranosyl bromide with corresponding phenols,using cetyltrimethyl ammonium bromide as a phase-transfer catalyst.In their IR spectra the absorption of bending vibration of C1-H bond in glycosyl-ring appears at about 900cm-1.In their 1H NMR spectra anomeric C1-H appears as a doublet as 5.08-5.14ppm with a coupling constant J1-2=7.8-8.0Hz.All these prove that these glucoside compounds have the configuration of β-anomer.The method has advantages of mild reaction conditions,easy separation and high stereospectificity of the products.展开更多
文摘Eight glucoside compounds were synthesized in 41.0-65.9% yields by reaction of 2,3,4,6-era-O-acetyl-α-D-glucopyranosyl bromide with corresponding phenols,using cetyltrimethyl ammonium bromide as a phase-transfer catalyst.In their IR spectra the absorption of bending vibration of C1-H bond in glycosyl-ring appears at about 900cm-1.In their 1H NMR spectra anomeric C1-H appears as a doublet as 5.08-5.14ppm with a coupling constant J1-2=7.8-8.0Hz.All these prove that these glucoside compounds have the configuration of β-anomer.The method has advantages of mild reaction conditions,easy separation and high stereospectificity of the products.
