Chlorination of 1,5-anhydro-4,6-O-benzylidene-2,3-dideoxy-3-nitro-D-arabino-hex-1-enitol in cyclic ethers such as tetrahydrofuran stereoselectively afforded the Ï-chloroalkyl β-D-glycopyranoside derivatives, whereas in 1,4-dioxane α-D-glycopyranosyl chloride was obtained in high yield.
1,5-anhydro-4,6-O-benzylidene-2,3-dideoxy-3-nitro-D-arabino-hex-1-enitol 在
环醚(如
四氢呋喃)中发生
氯化反应,可立体选择性地得到 Ï-chloroalkyl δ²-D-glycopyranoside 衍
生物,而在 1,4-dioxane 中则可高产率地得到 δ-D-glycopyranosyl chloride。