Asymmetric synthesis and biological evaluation of the enantiomeric isomers of the immunosuppressive FTY720-phosphate
作者:Masatoshi Kiuchi、Kunitomo Adachi、Ayumi Tomatsu、Masao Chino、Shuzo Takeda、Yoshihito Tanaka、Yasuhiro Maeda、Noriko Sato、Naoko Mitsutomi、Kunio Sugahara、Kenji Chiba
DOI:10.1016/j.bmc.2004.10.008
日期:2005.1
A practical asymmetric synthesis of both enantiomers of the immunosuppressive FTY720-phosphate (2) was accomplished, and the enantiomers were pharmacologically evaluated. Several lipases showed considerable activity and enantioselectivity for O-acylation of N-acetyl FTY720 (3) or N-benzyloxycarbonyl FTY720 (7) in combination with vinyl acetate or benzyl vinyl carbonate as the acyl donors. The synthesis
完成了对免疫抑制性FTY720-磷酸酯(2)的两种对映异构体的实际不对称合成,并通过药理学评估了该对映异构体。几种脂肪酶与N-乙酰基FTY720(3)或N-苄氧基羰基FTY720(7)结合乙酸乙烯酯或碳酸苄基乙烯基酯作为酰基供体,对O-酰化显示出显着的活性和对映选择性。使用脂肪酶催化的酰化作用作为关键步骤的合成产生了对映体纯的(> 99.5%ee)对映体,数量为2克。(2)的(S)-异构体比(R)-2具有更强的与S1P(1,3,4,5)的结合亲和力和对淋巴细胞向S1P迁移的抑制活性,这表明2的(S)-异构体对给药1后的免疫抑制活性。