Synthesis and antitumour activity of trimethylsilylpropyl substituted benzimidazoles
摘要:
The quaternisation of N-substituted benzimidazoles by heating with various alkyl, allyl, propargyl and benzyl chlorides and bromides leads to the formation of benzimidazolinium salts. The interaction of N-monosubstituted benzimidazoles with various salts (CuCl2, ZnCl2, CoCl2, PdCl2, and AgNO3) Yielded stable sol-id complexes. Potential cytotoxic activity of synthesised benzimidazolinium salts and benzimidazole metal complexes was tested in vitro on four monolayer tumour cell Hues: MG-22A (mouse hepatoma), HT-1080 (human fibrosarcoma), B16 (mouse melanoma), Neuro 2A (mouse neuroblastoma) and normal mouse fibroblast cells. A preliminary analysis of the structure-activity relationship for the benzimidazole derivatives clearly indicates that the character of substituents in the benzimidazole ring has strong influence on the cytotoxic activity. The insertion of the silicon atom into the N-alkyl chain increases the cytotoxic activity of benzimidazolinium salts significantly, which show a very significant potency in vitro against all studied tumour cell lines, being particularly active in experiments with B16 (mouse melanoma). TD, for the most active compounds are in the range 0.001-0.008 mug ml(-1). Cytotoxicity of benzimidazole metal complexes (L2MX2) strongly depends on the metal nature. 1-(3-Trimethylsilylpropyl)benzimidazole in dose 1 mg kg(-1) inhibits carcinoma S-180 tumour growth by 62% (on ICR mice). (C) 2001 Editions scientifiques et medicales Elsevier SAS.
The invention concerns novel silicon compounds derived from ascorbic acid consisting of a silicon-containing chain or of silanes, comprising at least a radical A of formula (I) wherein: at least one of the radicals L is a divalent radical for fixing A on the silicon chain. The invention further concerns methods for preparing said compounds, compositions, in particular cosmetic or pharmaceutical, containing them, and their use as antioxidant and/or anti-free radical agent, particularly for treating oxidant stress, for treating the effects of exposure to the sun and for preventing ageing.
Organometallic photochemistry photochemistry of some acyclic ketosilanes
作者:Henry G. Kuivila、Perry L. Maxfield
DOI:10.1016/s0022-328x(00)81715-5
日期:1967.10
Photolysis of a series of silyl ketones with the general structure (CH3)3Si(CH2)nCOR with n = 0–4, R = C6H5 and with n = 0–3, R = CH3 has been investigated. When n = 3 or 4 a major course of reaction is the Type II cleavage. When R = CH3 and n = 3 a substantial amount of cyclobutanol formation occurs; none is detected when R = C6H5. If n = 2 and R = C6H5 the only photoreactions established are reductive
具有通式结构的一系列甲硅烷基酮的光解(CH 3)3 SI(CH 2)ñ COR与Ñ = 0-4,R = C 6 H ^ 5,并用Ñ = 0-3,R = CH 3已经调查。当n = 3或4时,反应的主要过程是II型裂解。当R = CH 3且n = 3时,会形成大量的环丁醇。当R = C 6 H 5时,没有检测到。如果n = 2且R = C 6 H 5唯一建立的光反应是还原性烷基化(通过溶剂环己烷)和羰基亚甲基键的裂解。如果R = CH 3,则可以在羰基-亚甲基键的初始裂解的基础上使所有分离出的产物合理化。在惰性溶剂中,n = 1或0的化合物几乎不会发生光化学分解。但是,每种化合物都容易进行光催化水解以形成三甲基硅烷醇和醛或酮。
Radical addition reactions of alkenylsilanes
作者:A. W. P. Jarvie、R. J. Rowley
DOI:10.1039/j29710002439
日期:——
bond in three series of alkenylsilanes, R3Si·[CH2]n·CHCH2(R = Me, Ph, or Cl) toward addition by the trichloromethylradical have been determined, and the relative reactivities of vinyl- and allyltrimethylsilane toward free radicaladdition by n-dodecanethiol have been investigated. The factors influencing the reactivities of the various alkenylsilanes toward radicaladdition reagents are discussed.
and quantification of cardiolipin (CL). Optimized conditions allow the effective synthesis of NAO analogues with good yield and excellent purity. The introduction of a 3-(trimethylsilyl)propyl moiety improves the dye'ssolubility and stability in buffer solution and increases its emission intensity by ≈30%. The novel dye can be used for the selective quantification of CL in a liposomal inner mitochondrial
[EN] COMPOSITIONS AND METHODS FOR THE PREVENTION AND/OR TREATMENT OF MITOCHONDRIAL DISEASE, INCLUDING FRIEDREICH'S ATAXIA<br/>[FR] COMPOSITIONS ET MÉTHODES POUR LA PRÉVENTION ET/OU LE TRAITEMENT D'UNE MALADIE MITOCHONDRIALE, NOTAMMENT L'ATAXIE DE FRIEDREICH
申请人:STEALTH BIOTHERAPEUTICS CORP
公开号:WO2021202986A1
公开(公告)日:2021-10-07
The disclosure provides therapeutic compounds, compositions (e.g., therapeutic agents or medicaments) and methods for preventing or treating mitochondrial disease such as Friedreich's ataxia in a mammalian subject, reducing risk factors, signs and/or symptoms associated with mitochondrial disease, such as Friedreich's ataxia, and/or reducing the likelihood or severity of mitochondrial disease such as Friedreich's ataxia. The disclosure further provides novel intermediates for the production of said therapeutic compositions. In some instances, the intermediates may themselves by therapeutic agents or prodrugs of therapeutic agents (e.g. reduced forms of the therapeutic compounds).