截瘫是非凋亡性细胞死亡,其特征在于大量内质网(ER)或线粒体来源的液泡。与依赖凋亡的抗癌药物相比,诱发上pt裂可为化疗耐药性肿瘤的治疗提供显着优势。由于某些天然生物碱可诱导麻痹性细胞死亡,因此合成了一系列新的苯并[ a ]喹诺唑烷衍生物,并对其抗增殖活性和诱导细胞质空泡的能力进行了分析。结构优化导致了强效化合物22b的鉴定,该化合物在体内外抑制癌细胞的增殖,并极大地促进了类麻痹样细胞的死亡并诱导了caspase依赖性细胞凋亡。进一步调查发现22b介导的空泡作用源自持续的内质网应激和LC3B的上调。因此,由苯并[ a ]喹啉嗪衍生物诱导的截瘫代表了癌症化学疗法的另一种策略。
Synthesis of substituted tetrahydroisoquinolines by lithiation then electrophilic quench
作者:Ruaa A. Talk、Alexia Duperray、Xiabing Li、Iain Coldham
DOI:10.1039/c6ob00577b
日期:——
Substituted N-tert-butoxycarbonyl (Boc)-1,2,3,4-tetrahydroisoquinolines were prepared and treated with n-butyllithium in THF at −50 °C to test the scope of the metallation and electrophilic quench. The lithiation was optimised by using in situ ReactIR spectroscopy and the rate of rotation of the carbamate was determined. The 1-lithiated intermediates could be trapped with a variety of electrophiles
Mechanistic Studies on the Catalytic Asymmetric Mannich-Type Reaction with Dihydroisoquinolines and Development of Oxidative Mannich-Type Reactions Starting from Tetrahydroisoquinolines
作者:Christian Dubs、Yoshitaka Hamashima、Naoki Sasamoto、Thomas M. Seidel、Shoko Suzuki、Daisuke Hashizume、Mikiko Sodeoka
DOI:10.1021/jo800800y
日期:2008.8.1
Detailed mechanistic studies on our recently reported asymmetric addition reactions of malonates to dihydroisoquinolines (DHIQs) catalyzed by chiral Pd(II) complexes were carried out. It was found that an N,O-acetal was generated in situ by the reaction of DHIQ with (Boc)2O, and cooperative action of the Pd(II) complex as an acid−base catalyst allowed the formation of a chiral Pd enolate and a reactive
对我们最近报道的手性Pd(II)配合物催化的丙二酸酯与二氢异喹啉(DHIQs)的不对称加成反应进行了详细的机理研究。发现DHIQ与(Boc)2 O的反应原位生成了N,O-乙缩醛,作为酸碱催化剂的Pd(II)配合物的协同作用使得手性Pd烯醇盐形成和反应性亚胺离子通过α片段化 通过以DDQ作为氧化剂进行氧化也可以得到亚胺离子,并以四氢异喹啉(THIQs)为起始原料实现了催化不对称氧化曼尼希型反应。该氧化方案适用于N-丙烯酰基保护的THIQ,可通过分子内迈克尔反应有效合成光学活性的四氢苯并[ a ]喹啉二嗪衍生物。
Organocatalytic Asymmetric C–H Vinylation and Arylation of <i>N</i>-Acyl Tetrahydroisoquinolines
作者:Xigong Liu、Shutao Sun、Zhilin Meng、Hongxiang Lou、Lei Liu
DOI:10.1021/acs.orglett.5b00909
日期:2015.5.15
The first organocatalytic enantioselective oxidative C-H functionalization of N-acyl tetrahydroisoquinolines with vinyl and aryl boronates promoted by a chiral Bronsted acid is described. This metal-free process tolerates a wide range of electronically varied N-acyl tetrahydroisoquinolines and structurally diverse boronates with good to excellent enantioselectivities.