Structure–activity relationship study of pyrimido[1,2-c][1,3]benzothiazin-6-imine derivatives for potent anti-HIV agents
摘要:
3,4-Dihydro-2H,6H-pyrimido[1,2-c][1,3]benzothiazin-6-imine (PD 404182) is an antiretroviral agent with submicromolar inhibitory activity against human immunodeficiency virus-1 (HIV-1) and HIV-2 infection. In the current study, the structure-activity relationships of accessory groups at the 3- and 9-positions of pyrimido[1,2-c][1,3]benzothiazin-6-imine were investigated for the development of more potent anti-HIV agents. Several different derivatives containing a 9-aryl group were designed and synthesized using Suzuki-Miyaura cross-coupling and Ullmann coupling reactions. Modification of the m-methoxyphenyl or benzo[d][1,3]dioxol-5-yl group resulted in improved anti-HIV activity. In addition, the 2,4-diazaspiro[5.5]undec-2-ene-fused benzo[e][1,3]thiazine derivatives were designed and tested for their anti-HIV activities. The most potent 9-(benzo[d][1,3]dioxol-5-yl) derivative was two-threefold more effective against several strains of HIV-1 and HIV-2 than the parent compound, PD 404182. (C) 2012 Elsevier Ltd. All rights reserved.
[EN] MEDICINAL AGENT CONTAINING PYRMIDOBENZOTHIAZIN-6-IMINE DERIVATIVE OR SALT THEREOF FOR PREVENTION AND/OR TREATMENT OF VIRAL INFECTION<br/>[FR] AGENT THÉRAPEUTIQUE CONTENANT UN DÉRIVÉ DE PYRIMIDOBENZOTHIAZIN-6-IMINE OU UN SEL DE CELUI-CI POUR PRÉVENIR ET/OU TRAITER L'INFECTION VIRALE
[EN] BENZOISOTHIAZOLOPYRIMIDINE DERIVATIVE AND SALT THEREOF,AND VIRAL INFECTION INHIBITOR AND DRUG<br/>[FR] DÉRIVÉ BENZOISOTHIAZOLOPYRIMIDINE ET SEL DE CE DERNIER, ET INHIBITEUR D'INFECTION VIRALE ET MÉDICAMENT<br/>[JA] ベンゾイソチアゾロピリミジン誘導体またはその塩、およびウイルス感染阻害剤ならびに医薬品
3,4-Dihydro-2H,6H-pyrimido[1,2-c][1,3]benzothiazin-6-imine (PD 404182) is an antiretroviral agent with submicromolar inhibitory activity against human immunodeficiency virus-1 (HIV-1) and HIV-2 infection. In the current study, the structure-activity relationships of accessory groups at the 3- and 9-positions of pyrimido[1,2-c][1,3]benzothiazin-6-imine were investigated for the development of more potent anti-HIV agents. Several different derivatives containing a 9-aryl group were designed and synthesized using Suzuki-Miyaura cross-coupling and Ullmann coupling reactions. Modification of the m-methoxyphenyl or benzo[d][1,3]dioxol-5-yl group resulted in improved anti-HIV activity. In addition, the 2,4-diazaspiro[5.5]undec-2-ene-fused benzo[e][1,3]thiazine derivatives were designed and tested for their anti-HIV activities. The most potent 9-(benzo[d][1,3]dioxol-5-yl) derivative was two-threefold more effective against several strains of HIV-1 and HIV-2 than the parent compound, PD 404182. (C) 2012 Elsevier Ltd. All rights reserved.
Investigations of possible prodrug structures for 2-(2-mercaptophenyl)tetrahydropyrimidines: reductive conversion from anti-HIV agents with pyrimidobenzothiazine and isothiazolopyrimidine scaffolds
3,4-Dihydro-2H,6H-pyrimido[1,2-c][1,3]benzothiazin-6-imine (PD 404182) and 3,4-dihydro-2H-benzo[4,5]isothiazolo[2,3-a]pyrimidine are the heterocyclic antiretroviral agents against human immunodeficiency virus type 1 (HIV-1) infection. On the basis of similar structure–activity relationships of anti-HIV activities toward the early-stage of viral infection between these unique scaffolds, the transformations
3,4-二氢-2 H,6 H-嘧啶[1,2- c ] [1,3]苯并噻嗪-6-亚胺(PD 404182)和3,4-二氢-2 H-苯并[4,5]异噻唑啉[2,3- a]嘧啶是针对人类1型免疫缺陷病毒(HIV-1)感染的杂环抗逆转录病毒药物。基于这些独特支架之间抗HIV活性对病毒感染早期阶段的相似结构-活性关系,研究了生物测定条件下的转化。异噻唑并嘧啶骨架中独特的S–N键在GSH存在下于还原条件下立即裂解,生成硫酚衍生物。观察到PD 404182相似地快速转化为相同的硫酚衍生物,这表明嘧啶并苯并噻嗪和异噻唑并嘧啶骨架可以作为常见生物活性硫酚衍生物的前药形式发挥作用。