Synthesis and antitumor activity of new thiosemicarbazones of 2-acetylimidazo[4,5-<i>b</i>]pyridine
作者:Stavros Mylonas、Athanasios Mamalis
DOI:10.1002/jhet.5570420705
日期:2005.11
A number of thiosemicarbazones of 2-acetyl-imidazo[4,5-b]pyridine were prepared in order to investigate their in vitro antineoplastic activities. Three compounds: (i) 2-acetylimidazo[4,5-b]pyridin-4-sec-butyl-3-thiosemicarbazone [(A7), NSC674098], (ii) 2-acetylimidazo[4,5-b]pyridin-4-tert-butyl-3-thiosemi-carbazone [(A9), NSC674099], (iii) 2-acetylimidazo[4,5-b]pyridin-4-cyclohexyl-3-thiosemicarbozone
为了研究它们的体外抗肿瘤活性,制备了许多2-乙酰基-咪唑并[4,5- b ]吡啶的硫半脲。三种化合物:(i)2-乙酰基咪唑并[4,5- b ]吡啶-4-仲丁基-3-硫代半缩氨基甲酰胺[(A 7),NSC674098],(ii)2-乙酰基咪唑并[4,5- b ]吡啶-4-叔丁基-3-thiosemicarbozone [(A 9),NSC674099],(iii)2-乙酰基咪唑并[4,5- b ]吡啶-4-环己基-3-thiosemicarbozone [[A 11),NSC674101]对某些测试的细胞系显示出显着的活性。NCI的生物学评估委员会决定应进行进一步的二级检测(这些化合物已针对前列腺癌进行了检测)。
(Propargylsulfanyl)-2-aza-1,3,5-trienes as a direct source for novel family of highly functionalized 4,5-dihydro-1,3-thiazoles
作者:Nina A. Nedolya、Ol'ga A. Tarasova、Alexander I. Albanov、Lyudmila V. Klyba、Boris A. Trofimov
DOI:10.1016/j.tet.2016.12.064
日期:2017.2
2-(1-alkoxyprop-1-enyl)-5-ethenylidene-4,5-dihydro-1,3-thiazoles has been disclosed through the reaction of (propargylsulfanyl)-2-aza-1,3,5-trienes (readily available from alkoxyallenes, isothiocyanates, and propargyl bromide) with potassium or sodium tert-butoxide (1.1–1.4 equiv) under mild conditions [DMSO/THF (∼1:4–5), ca. −30 °C, 15–30 min]. The process proceeds through deprotonation of an activated SCH2 group
Mass spectra of new heterocycles: X. Fragmentation of the molecular ions of 1-alkyl(cycloalkyl, aryl)-3-alkoxy(aryl)-2-methylsulfanyl-1H-pyrroles
作者:L. V. Klyba、N. A. Nedolya、O. A. Tarasova、E. R. Zhanchipova、O. G. Volostnykh
DOI:10.1134/s1070428010070134
日期:2010.7
The massspectra of previously unknown 1-alkyl(cycloalkyl, aryl)-3-alkoxy(aryl)-2-methylsulfanyl-1H-pyrroles were studied. Fragmentation of all 3-alkoxy-substituted pyrroles under electron impact (70 eV) follow both ether and sulfide decomposition paths; In particular, 1-R-substituted 3-methoxy-2-methylsulfanyl-1H-pyrroles (R = Me, Et, i-Pr, s-Bu, cyclo-C5H9, cyclo-C6H11, Ph) lose methyl radical group
研究了以前未知的1-烷基(环烷基,芳基)-3-烷氧基(芳基)-2-甲基硫基-1 H-吡咯的质谱。所有3-烷氧基取代的吡咯在电子轰击(70 eV)下的裂解均遵循醚和硫化物的分解路径。特别是1-R-取代的3-甲氧基-2-甲基硫烷基-1 H-吡咯(R = Me,Et,i- Pr,s- Bu,环-C 5 H 9,环-C 6 H 11,Ph )从甲氧基和甲基硫烷基基团失去甲基基团。1秒的质谱丁基和1环烷基吡咯也有一个强峰(10-49%),该峰来自通过同步氢转移裂解NR键形成的奇电子[ M C n H 2 n ] +·离子。3-烷氧基-1-异丙基-2-甲基硫烷基-1 H-吡咯(Alk = Et,i -Pr,t -Bu)断裂中的O-Alk键断裂伴随重排过程,导致相应的烯烃和1-电子的1-异丙基-2-甲基硫烷基-1 H-吡咯-3-醇离子。1-烷基-2-甲基硫烷基-3-苯基-1 H-吡咯的主要裂解途径(Alk
Antimicrobial Activity of Newly Synthesized Isothiocyanate Derivatives Against Pathogenic Plant Microorganisms
作者:M. Kado、Misao Kojima
DOI:10.1002/jps.2600651039
日期:1976.10
Fifteen reaction products of isothiocyanates with cysteine, seven reaction products of isothiocyanates with 2,3-dimercapto-1-propanol, and four reaction products of isothiocyanates with sulfanilamide were synthesized. Their antimicrobialactivityagainstpathogenicplantmicroorganisms was investigated.
Effect on <i>K</i><sub>ATP</sub> Channel Activation Properties and Tissue Selectivity of the Nature of the Substituent in the 7- and the 3-Position of 4<i>H</i>-1,2,4-Benzothiadiazine 1,1-Dioxides
structurally related to previously described potassiumchannel openers such as the benzothiadiazine dioxide BPDZ 73, were tested as putative K(ATP) channelactivators on the pancreatic endocrine tissue and on the vascular smooth muscle tissue. The nature of the substituent introduced in the 7-position as well as the nature of the alkylamino side chain in the 3-position strongly affected both potency and tissue