由于甲硅烷基团容易迁移,甲硅烷基甲脒1与其碳烯形式1'处于平衡状态。1与各种取代的氟苯的反应随着亲核卡宾1'的插入而进行在混合试剂后进入最酸性的 C-H 键,不需要任何催化剂。根据 DFT 计算,通过三元过渡态结构进行的插入反应的经典解释需要高活化能。相反,预计将芳香底物中酸性最强的质子转移到卡宾碳上的活化势垒较低。下一步,形成的离子对向产物的无障碍重排完成了该过程。取代苯在与甲硅烷基甲脒反应中的反应性可以通过计算的C-H 氢的p K a (DMSO) 值粗略评估。具有 p K a的苯衍生物约 少于 31 个可以进行 C-H 插入。该反应提供缩醛胺作为第一批产物,它可以很容易地通过酸水解转化为相应的醛。由于甲硅烷基甲脒1对许多官能团具有耐受性,该反应可应用于多种苯衍生物,使其成为有机合成应用的可靠策略。
The present invention relates to compounds according to formula 1,
which exhibit cytotoxic activity. The compounds may be used in the treatment of cancer.
本发明涉及符合式1的化合物,具有细胞毒活性。这些化合物可用于治疗癌症。
Irreversible Inhibition of DNA Polymerase β by Small-Molecule Mimics of a DNA Lesion
作者:Dumitru Arian、Mohammad Hedayati、Haoming Zhou、Zoe Bilis、Karen Chen、Theodore L. DeWeese、Marc M. Greenberg
DOI:10.1021/ja411733s
日期:2014.2.26
inactivate DNApolymeraseβ. A library of small molecules whose structures were inspired by the oxidized abasic sites was synthesized and screened for the ability to irreversibly inhibitDNApolymeraseβ. One candidate (3a) was examined more thoroughly, and modification of its phosphate backbone led to a molecule that irreversibly inactivates DNApolymeraseβ in solution (IC50 ≈ 21 μM), and inhibits the enzyme's
无碱基位点是无处不在的 DNA 损伤,具有致突变性和细胞毒性,但可通过碱基切除修复途径去除。DNA 聚合酶 β 在碱基切除修复过程中执行四个步骤中的两个,包括裂解酶反应,该反应在切割其 5'-磷酸后从 DNA 中去除脱碱基位点。DNA聚合酶β在癌细胞中过度表达,是潜在的抗癌靶点。最近,由强效抗肿瘤剂产生的 DNA 氧化脱碱基位点被证明可以使 DNA 聚合酶 β 失活。合成了结构受氧化脱碱基位点启发的小分子文库,并筛选了不可逆抑制 DNA 聚合酶 β 的能力。一名候选人 (3a) 接受了更彻底的审查,磷酸骨架的修饰和修饰导致分子在溶液中不可逆地灭活 DNA 聚合酶 β (IC50 ≈ 21 μM),并抑制细胞裂解物中酶的裂解酶活性。双乙酸酯类似物在细胞裂解物中转化为 3a。双乙酸盐在细胞裂解物中更有效,在前列腺癌细胞中比 3a 具有更强的细胞毒性,并将甲磺酸甲酯的细胞毒性增强 2 到 5 倍。这是
[EN] PEPTIDE MACROCYCLES AGAINST ACINETOBACTER BAUMANNII<br/>[FR] MACROCYCLES PEPTIDIQUES CONTRE ACINETOBACTER BAUMANNII
申请人:HOFFMANN LA ROCHE
公开号:WO2017072062A1
公开(公告)日:2017-05-04
The present invention provides compounds of formula (I) wherein X1 to X8 and R1 to R8 are as described herein, as well as pharmaceutically acceptable salts thereof. Further the present invention is concerned with the manufacture of the compounds of formula (I), pharmaceutical compositions comprising them and their use as medicaments for the treatment of diseases and infections caused by Acinetobacter baumannii.
[EN] HETEROCYCLIC COMPOUNDS AS JANUS KINASE INHIBITORS<br/>[FR] COMPOSÉS HÉTÉROCYCLIQUES UTILISABLES EN TANT QU'INHIBITEURS DES JANUS KINASES
申请人:BIOCRYST PHARM INC
公开号:WO2013033093A1
公开(公告)日:2013-03-07
The invention provides compounds of formula I: (I) or a salt thereof as described herein. The invention also provides pharmaceutical compositions comprising a compound of formula I, processes for preparing compounds of formula I, intermediates useful for preparing compounds of formula I and therapeutic methods for suppressing an immune response or treating cancer, including a hematologic malignancy, using compounds of formula I.
[EN] BICYCLIC KETONE COMPOUNDS AND METHODS OF USE THEREOF<br/>[FR] COMPOSÉS CÉTONIQUES BICYCLIQUES ET LEURS PROCÉDÉS D'UTILISATION
申请人:HOFFMANN LA ROCHE
公开号:WO2019012063A1
公开(公告)日:2019-01-17
The invention provides novel compounds having the general formula (I): (I) wherein R1, the A ring and the B ring are as described herein, pharmaceutical compositions including the compounds, and methods of using the compounds.