General methods for modification of sialic acid at C-9. Synthesis of N-acetyl-9-deoxy-9-fluoroneuraminic acid
作者:Moheswar Sharma、Charles R. Petrie、Walter Korytnyk
DOI:10.1016/0008-6215(88)80153-8
日期:1988.4
groups were protected as benzyl ethers. Removal of the trityl group, followed by treatment with diethylaminosulfur trifluoride gave the 9-deoxy-9-fluoro derivative, and deprotection N-acetyl-9-deoxy-9-fluoroneuraminic acid (8). In another procedure, coupling of 2-acetamido-2,6-dideoxy-6-fluoro-D-glucopyranose with potassium di(tert-butyl) oxaloacetate, followed by hydrolysis and decarboxylation gave
将5-乙酰氨基-3,5-二脱氧-2-O-甲基-D-甘油-D-半乳糖-2-壬基吡喃酮酸酯转化为9-O-三苯甲基衍生物,并将剩余的羟基保护为苄基醚。除去三苯甲基,然后用二乙基氨基三氟化硫处理,得到9-脱氧-9-氟衍生物和脱保护的N-乙酰基-9-脱氧-9-氟神经氨酸(8)。在另一种方法中,将2-乙酰氨基-2,6-二脱氧-6-氟-D-吡喃葡萄糖与草酸二叔丁酯钾偶合,然后水解和脱羧,得到8。一些衍生物具有活性作为抑制剂。培养中小鼠乳腺腺癌(TA3)和L1210细胞的生长