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第 36 卷第 5 期                             精   细   化   工                                  Vol.36, No.5
             201 9 年 5 月                             FINE CHEMICALS                                 May    2019


              精细化工中间体
                                       RSL3 中间体的简便合成



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                            刘   斌    1,2 ,朱周静      1,2 ,祝婷婷 ,张方成 ,张彦民                      1,2
                 (1.  陕西国际商贸学院  医药学院,陕西  西安    712046;2.  陕西省中药绿色制造技术协同创新中心,陕
                 西  西安    712046)

                 摘要:以 D-色氨酸为原料,通过酯化、Pictet-Spengler 两步反应,简便有效地合成了 RSL3 的关键中间体——
                 (1S,3R)-1-[4-(甲氧羰基)苯基]-2,3,4,9-四氢-1H-吡啶[3,4-b]吲哚-3-羧酸甲酯盐酸盐。对 Pictet-Spengler 反应条件进
                 行了考察。结果表明:当 n(D-色氨酸甲酯盐酸盐)∶n(4-甲酰基苯甲酸甲酯)=1∶1.1、乙腈为反应溶剂,回流反
                                                                                                 1
                 应 6 h,通过减压抽滤即可得到 trans-构型产物(RSL3 中间体),总收率为 61.5%。产物及中间体经过 HNMR、
                    1
                 1 H- H NOESY 和 ESI-MS 进行确认。
                 关键词:RSL3 中间体;Pictet-Spengler 反应;四氢--咔啉;构型
                 中图分类号:TQ463.26      文献标识码:A      文章编号:1003-5214 (2019) 05-1012-04


                                 A Convenient Synthesis of RSL3 Intermediate


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                                                                                                   1,2
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                            1,2
                                            1,2
                    LIU Bin , ZHU Zhou-jing , ZHU Ting-ting , ZHANG Fang-Cheng , ZHANG Yan-min
                 (1. School of Pharmacy, Shaanxi Institute of International Trade & Commerce, Xi'an 712046, Shaanxi, China; 2. Collaborative
                 Innovation Center of Green Manufacturing Technology for Traditional Chinese Medicine in Shaanxi Province,  Xi'an
                 712046, Shaanxi, China)
                 Abstract:(1S,3R)-methyl-1-[(4-(methoxycarbonyl)phenyl)]-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-
                 carboxylate  hydrochloride,  the  key  intermediate  of  RSL3,  was  synthesized  by  an  efficient  and  practical
                 method  from  D-tryptophan  through  a  two-step  reaction,  involving  esterification  and  Pictet-Spengler
                 reaction.  Pictet-Spengler  reaction  conditions  for  the  synthesis  of  target  product  were  investigated.  The
                 optimal conditions were obtained as follows: the molar ratio of D-tryptophan methyl ester hydrochloride to
                 methyl  4-formylbenzoate  was  1∶1.1,  the  mixture  was  stirred  in  acetonitrile  and  refluxed  for  6 h.  The
                 trans-isomer  (RSL3  intermediate)  was obtained by  suction filtration, with the total yield of  61.5%. The
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                 structures of the intermediate and final products were confirmed by  HNMR,  H- H NOESY and ESI-MS.
                 Key words: RSL3 intermediate; Pictet-Spengler reaction; tetrahydro-β-carboline; configuration
                 Foundation  items:  Natural  Science  Foundation  of  Shannxi  Province  (2018JM7046);  Special  Scientific
                 Research  Plan  Project  of  Shaanxi  Provincial  Department  of  Education  (18JK0954);  Undergraduate
                 Innovation and Entrepreneurship Training Programs of Shannxi Province (201849013)


                                                                       [5]
                 RSL3,化学名(1S,3R)-2-(2-氯乙酰基)-1-[4-(甲            广泛关注 。RSL3 的关键中间体(1S,3R)-1-[4-(甲
            氧羰基)苯基]-2,3,4,9-四氢-1H-吡啶[3,4-b]吲哚-3-羧              氧羰基)苯基]-2,3,4,9-四氢-1H-吡啶[3,4-b]吲哚-3-羧
            酸甲酯,是谷胱甘肽过氧化物酶 4(GPX4)抑制    酸甲酯盐酸盐,其化学结构是一种具有 1,3-双取代
                                               [3]
            剂 [1-2] ,也是一种铁死亡(ferroptosis) 的激活剂,                四氢-β-咔啉母核的衍生物,其结构中含有两个手性
            它能结合并使 GPX4 失活,介导 GPX4 所调节的铁                       中心(1S,3R),为反式(trans-)构型。而目前已报
                [4]
            死亡 。虽然 RSL3 仍处于临床前研究阶段,但它所                         道的 1,3-双取代四氢-β-咔啉衍生物的合成方法中                [6-7] ,
            表现出来的良好生物活性已引起很多前沿研究者的                             主要是以顺式(cis-)构型研究为主,而反式(trans-)

                 收稿日期:2018-08-25;  定用日期:2018-12-25; DOI: 10.13550/j.jxhg.20180623
                 基金项目:陕西省自然科学基础研究计划(面上)项目(2018JM7046);陕西省教育厅 2018 年度专项科学研究计划项目(18JK0954);
                 陕西省大学生创新创业项目(201849013)
                 作者简介:刘   斌(1982—),男,博士,讲师,电话:029-33694369,E-mail:lb125lb@163.com。
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