Potential carcinostatics. Synthesis and biological properties of d- and l-.beta.,.beta.-difluoroaspartic acid and .beta.,.beta.-difluoroasparagine
作者:Johanna J. M. Hageman、Martinus J. Wanner、Gerrit Jan Koomen、Upendra K. Pandit
DOI:10.1021/jm00222a029
日期:1977.12
Di-tert-butyl beta,beta-difluorooxaloacetate, prepared by fluorination of di-tert-butyl oxaloacetate with perchloryl fluoride, was converted to di-tert-butyl beta,beta-difluoroaspartate via its O-methyl oxime, followed by reduction. The tert-butyl ester was hydrolyzed to give a mixture of dl-beta,beta-difluoroaspartic acid, which was resolved via its brucine salts. dl-Difluoroaspartic acid was converted
将草酸乙酸二叔丁酯与高氯酰氟氟化而制得的β-β-二氟草酸二叔丁酯通过其O-甲基肟转化为β-β-二氟天冬氨酸二叔丁酯,然后还原。水解叔丁酯,得到dl-β,β-二氟天冬氨酸的混合物,将其通过其粗碱式盐拆分。通过单酯化和随后的氨解将dl-二氟天冬氨酸转化为β,β-二氟天冬酰胺。外消旋β,β-二氟天冬氨酸抑制天冬氨酸转氨酶。1-β,β-二氟天冬氨酸对3T3-F细胞的细胞生长有轻微的抑制作用,而d对映体在该测试系统中没有作用。