Acute leukemia is a hematological malignancy with high incidence and recurrence rates and is characterized by an accumulation of blasts in bone marrow due to proliferation of immature lymphoid or myeloid cells associated with a blockade of differentiation. The heterogeneity of leukemia led us to look for new specific molecules for leukemia subtypes or for therapy-resistant cases. Among heterocyclic derivatives that attracted attention due to their wide range of biological activities, we focused our interest on the pyrrolo[1,2-a]quinoxaline heterocyclic framework that has been previously identified as an interesting scaffold for antiproliferative activities against various human cancer cell lines. In this work, new ethyl 4-[4-(4-substituted piperidin-1-yl)]benzylpyrrolo[1,2-a]quinoxalinecarboxylate derivatives (1 a-o) were designed, synthesized, and evaluated against five different leukemia cell lines, including Jurkat and U266 (lymphoid cell lines) and K562, U937, and HL60 (myeloid cell lines), as well as on normal human peripheral blood mononuclear cells (PBMCs). This new pyrrolo[1,2-a]quinoxaline series showed interesting cytotoxic potential against all tested leukemia cell lines. In particular, pyrroloquinoxalines 1 a and 1 m,n seem to be interesting due to their high activity against leukemia and their low activity against normal hematopoietic cells, leading to a high index of selectivity.

中文翻译：

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4- [4-（4-取代的哌啶-1-基）]苄基吡咯并[1,2-a]喹喔啉羧酸酯衍生物的合成及其对人白血病细胞的抑制作用。

急性白血病是一种具有高发病率和复发率的血液系统恶性肿瘤，其特征是由于未成熟的淋巴或髓样细胞的增殖与分化的阻断相关，从而使骨髓中的胚细胞积聚。白血病的异质性促使我们寻找针对白血病亚型或治疗耐药病例的新的特异性分子。在由于其广泛的生物活性而引起关注的杂环衍生物中，我们将注意力集中在吡咯并[1,2-a]喹喔啉杂环骨架上，该骨架先前已被确定为针对各种人类癌细胞系的抗增殖活性的有趣支架。在这项工作中，设计，合成了新的乙基4- [4-（4-取代的哌啶-1-基）苄基吡咯并[1,2-a]喹喔啉羧酸酯衍生物（1 ao），并针对五种不同的白血病细胞系（包括Jurkat和U266（淋巴样细胞系）以及K562，U937和HL60（骨髓细胞系））以及正常人外周血单核细胞（PBMC）进行了评估。这个新的吡咯并[1,2-a]喹喔啉系列对所有测试的白血病细胞系显示出有趣的细胞毒性潜力。特别地，吡咯并喹喔啉1a和1m，n由于其对白血病的高活性和对正常造血细胞的低活性而显得很有趣，从而导致高的选择性指数。2-a]喹喔啉系列对所有测试的白血病细胞系均表现出令人感兴趣的细胞毒性潜能。特别地，吡咯并喹喔啉1a和1m，n由于其对白血病的高活性和对正常造血细胞的低活性而显得很有趣，从而导致高的选择性指数。2-a]喹喔啉系列对所有测试的白血病细胞系均表现出令人感兴趣的细胞毒性潜能。特别地，吡咯并喹喔啉1a和1m，n由于其对白血病的高活性和对正常造血细胞的低活性而显得很有趣，从而导致高的选择性指数。