Quinazoline Antifolate Thymidylate Synthase Inhibitors: γ-Linked <scp>l</scp>-<scp>d</scp>, <scp>d</scp>-<scp>d</scp>, and <scp>d</scp>-<scp>l</scp> Dipeptide Analogues of 2-Desamino-2-methyl-<i>N</i><sup>10</sup>-propargyl-5,8-dideazafolic Acid (ICI 198583)<sup>,</sup>
作者:Vassilios Bavetsias、Ann L. Jackman、Rosemary Kimbell、William Gibson、F. Thomas Boyle、Graham M. F. Bisset
DOI:10.1021/jm950471+
日期:1996.1.1
The syntheses of gamma-linked L-D, D-D, and D-L dipeptide analogues of 2-desamino-2-methyl-N10-propargyl-5,8-dideazafolic acid (ICI 198583) are described. The general methodology for the synthesis of these molecules involved the preparation of the dipeptide derivatives employing solution phase peptide synthesis followed by condensation of the dipeptide free bases with the appropriate pteroic acid analogue
描述了γ-连接的2-脱氨基-2-甲基-N10-炔丙基-5,8-二氮杂萘甲酸的LD,DD和DL二肽类似物的合成(ICI 198583)。合成这些分子的通用方法包括采用溶液相肽合成法制备二肽衍生物,然后通过氰基磷酸二乙酯(DEPC)活化将二肽游离碱与适当的蝶酸类似物缩合。在最后一步中,通过三氟乙酸(TFA)水解除去叔丁酯。ZL-Glu-OBut-γ-D-Ala-OBut例如是由N-(苄氧羰基)-L-谷氨酸的α-叔丁基和D-丙氨酸的叔丁基通过异丁基-混合酸酐偶联制备的。通过催化氢解除去Z-基团,并通过DEPC偶联将所得的二肽游离碱与2-脱氨基-2-甲基-N10-炔丙基-5,8-二脱氮杂戊酸缩合。最后,通过TFA水解除去叔丁酯,得到ICI198583-γ-D-Ala。测试这些化合物作为胸苷酸合酶和L1210细胞生长的抑制剂。发现与γ-连接的LD二肽具有良好的酶和生长抑制活性,最好的例子是Glu-γ-D-Glu衍生物35(Ki