申请人:Technische Universität Graz
公开号:EP1903034A1
公开(公告)日:2008-03-26
The iminosugar conjugates according to the invention are N-alkylated 1,5-dideoxy-1,5-iminohexitol or 1,5-dideoxy-1,5-iminopentitol derivatives. The iminosugar component can be, for example, D-gluco-, L-ido-, D-galacto-, D-manno-, 2-acetamido-2-deoxy-D-gluco- or xylo-configuration. The N-substituent is a protected L-α-aminoacid derivative, showing L-lysine-like structural features. The linkage between the carbohydrate and the peptide component is not via the usual glycosidic position, but shows structural features of a very stable tertiary amine. Thus the linkage is very stable. These new compounds are synthesised by using catalytic intramolecular reductive amination of dicarbonyl sugars with partially protected amino acids. The process of intramolecular reductive amination itself is carried out using Pearlman's catalyst (Pd(OH)2/C) and H2 at ambient pressure and room temperature.
The resulting accessible class of iminosugar conjugate compounds is represented by the general structure shown in Figure 4(c). The alkyl chain length parameter n can be freely chosen from n=0 upwards. Preferably n is between 0 and 10, and more preferably n is 2, 3, or 4. Residue R1 can be chosen from H, OH, or NHAc, with Ac being Acetyl. R2 can be H, OH, or NHAc. R3, R4, R5, R6 can be H or OH. R7 and R8 can be H, CH2OH CH3, COQH, or COOR with R being Alkyl or Aryl. R9 and R10 can be chosen from H, NH2, NHR, with R being a protective group, an amino acid, a peptide, or a protein. R11 can be OH, O-Alkyl, O-Aryl, NH2, N-Alkyl, N-Aryl, amino acid or peptide, connected via an amide bond.
本发明涉及的亚
氨基糖缀合物是N-烷基化的1,5-二
脱氧-1,5-亚
氨基己糖醇或1,5-二
脱氧-1,5-亚
氨基戊糖醇衍
生物。亚
氨基糖部分可以是例如
D-葡萄糖、
L-艾杜糖、
D-半乳糖、
D-甘露糖、2-乙酰
氨基-2-
脱氧-
D-葡萄糖或
木糖构型。N-取代基是一种保护的L-
α-氨基酸衍
生物,显示出类似
L-赖氨酸的结构特征。糖和肽组分之间的连接不是通过常规的糖苷位置,而是显示出非常稳定的叔胺的结构特征。因此,这种连接非常稳定。这些新化合物是通过使用
催化剂催化二羰基糖与部分保护的
氨基酸之间的分子内还原胺化合成的。分子内还原胺化过程本身是在常压和室温下使用Pearlman
催化剂(Pd(OH)2/C)和
氢气进行的。由此得到的一类亚
氨基糖缀合物化合物的可及性由图4(c)所示的通用结构表示。烷基链长参数n可以从n=0开始自由选择。优选n在0到10之间,更优选n为2、3或4。残基R1可以从H、OH或NHAc中选择,其中Ac代表
乙酰基。R2可以是H、OH或NHAc。R3、R4、R5、R6可以是H或OH。R7和R8可以是H、CH2OH、
CH3、COQH或COOR,其中R是烷基或芳基。R9和R10可以从H、NH2、NHR中选择,其中R是一个保护基团、
氨基酸、肽或蛋白质。R11可以是OH、O-烷基、O-芳基、NH2、N-烷基、N-芳基、
氨基酸或肽,通过
酰胺键连接。