据报道,通过醌与胍衍生物的反应合成2-氨基苯并咪唑-6-醇的新策略。该方法的顺序应用提供了对具有双-2-氨基咪唑部分的第一个苯并ceptrin类似物的简单访问。同时向萘[1',2':4,5]咪唑并[1,2 - a ]嘧啶-5,6-二酮中添加两个胍,包括氧化还原中性脱苄基化和胍辅助的2裂解-氨基嘧啶部分导致一步合成苯并三萜的游离的具有挑战性的连续的-2--2-氨基咪唑部分。
Naphtho[1',2':4,5]imidazo[1,2-a]pyridine-5,6-diones (NPDOs), a new type of N-heterocycle-fused o-quinones, have been synthesized. They have been found to be efficient electron-accepting substrates of NADPH-dependent single-electron-transferring P-450R and two-electron transferring NQO1, generating reactive oxygen species (ROS) with a concomitant decrease in NADPH, which is consistent with redox-cycling. The reactivity of NPDOs toward P-450R (in terms of k(cat)/K-m) varied in the range of 10(6)-10(7) M-1 s(-1), while their reduction by NQO1 proceeded much faster, approaching the diffusion control limit (k(cat)/K-m similar to 10(8)-10(9) M-1 s(-1)). NPDOs exhibited relatively high cytotoxic activity against human lung carcinoma (A-549) and breast tumor (MCF-7) cell lines (LC50 = 0.1-8.3 mu M), while promyelocytic leukemia cells (HL-60) were less sensitive to NPDOs (LC50 >= 10 mu M). 3-Nitro-substituted NPDO (11) revealed the highest potency against both A-549 and MCF-7 cell lines, with LC50 of 0.12 +/- 0.03 mu M and 0.28 +/- 0.08 mu M, respectively. Dicoumarol partly suppressed the activity of the compounds against A-594 and MCF-7 cell lines, suggesting that their cytotoxic action might be partially influenced by NQO1-mediated bioreductive activation. (C) 2015 Elsevier Ltd. All rights reserved.
Mathur; Tilak, Journal Of Scientific and Industrial Research, 1958, vol. 17 B, p. 33,38
作者:Mathur、Tilak
DOI:——
日期:——
Lareginie, Pierre; Lokshin, Vladimir; Samat, Andre, Journal of the Chemical Society. Perkin transactions II, 1996, p. 107 - 112
Reaction of Quinones and Guanidine Derivatives: Simple Access to Bis-2-aminobenzimidazole Moiety of Benzosceptrin and Other Benzazole Motifs
作者:Minh Quan Tran、Ludmila Ermolenko、Pascal Retailleau、Thanh Binh Nguyen、Ali Al-Mourabit
DOI:10.1021/ol403672p
日期:2014.2.7
A new strategy for the synthesis of 2-aminobenzimidazol-6-ols via a reaction of quinones with guanidine derivatives is reported. Sequential application of this methodology provided a simple access to the first benzosceptrin analogue bearing a bis-2-aminoimidazole moiety. A concomitant addition of two guanidines to the naphtho[1′,2′:4,5]imidazo[1,2-a]pyrimidine-5,6-dione, which includes the redox neutral
据报道,通过醌与胍衍生物的反应合成2-氨基苯并咪唑-6-醇的新策略。该方法的顺序应用提供了对具有双-2-氨基咪唑部分的第一个苯并ceptrin类似物的简单访问。同时向萘[1',2':4,5]咪唑并[1,2 - a ]嘧啶-5,6-二酮中添加两个胍,包括氧化还原中性脱苄基化和胍辅助的2裂解-氨基嘧啶部分导致一步合成苯并三萜的游离的具有挑战性的连续的-2--2-氨基咪唑部分。