Skip to main content
. Author manuscript; available in PMC: 2021 Jul 26.
Published in final edited form as: Tetrahedron. 2019 Feb 16;75(13):2037–2046. doi: 10.1016/j.tet.2019.02.027

Table 2.

Study of isomerization of β-xylofuranoside 11b to α-xylofuranoside 11a under acidic conditions.

Entry Regents and conditions Acid (equiv.) 11b:11aa Yields (%)b
1 MeOH/CH3SO2OH, rt, 18 h 5.5 1:0.66 32
2 MeOH/HCl, rt, 3 h 0.87 1:0.90 47
a

Ratio of 5-O-benzoyl β/α -xylofuranosides 11b and 11a determined from the 1H NMR spectrum of the anomeric mixture after treatment.

b

Yields of methyl 5-O-benzoyl α-xylofuranoside 11a refer to NMR yields.