Methyl-4-O-acetyl-5-acetylamino-3,5-didesoxy-β-D-glycero-D-talo-2-nonulopyranosidonsaeure-methylester 、
2,2-二甲氧基丙烷 在
Amberlyst 15 、
氢气 作用下,
以
丙酮 为溶剂,
反应 0.5h,
生成 Methyl-5-acetylamino-2,6-anhydro-3,5-didesoxy-8,9-O-isopropyliden-β-D-manno-non-4-ulosidonsaeure-methylester 、
Methyl-4-O-acetyl-5-acetylamino-3,5-didesoxy-8,9-O-isopropyliden-β-D-glycero-D-talo-2-nonulopyranosidonsaeure-methylester 、
Methyl-(methyl-5-acetamido-3,5-dideoxy-8,9-O-methylethyliden-D-glycero-α-D-talo-nonulopyranosid)onat 、 Methyl-5-acetylamino-3,5-didesoxy-8,9-O-isopropyliden-β-D-glycero-D-talo-2-nonulopyranosidonsaeure-methylester