用于制备稠合[1,2,4]三唑的新杂环反应:由4-氨基-1,2合成1,2,4-三唑并[4,3- b ] [1,2,4]三唑衍生物,4-三唑和碳化二亚胺或通过亚氨基正膦和二取代的硫脲
摘要:
已经制备了许多1,2,4-三唑并[4,3- b ] [1,2,4]三唑衍生物。4-氨基-2-甲基-5-甲硫基-2- ħ -1,2,4-三唑-3-(4 ħ) -酮(1)反应以diarylcarbodi -酰亚胺,得到相应的4-(Ñ,Ñ ' -二芳基)胍基-2-甲基-5-甲硫基-2 H -1,2,4-三唑-3(4 H)-ones(3)-(6)。2-甲基-5-甲基硫代-4-三苯基磷酰亚氨基氨基-2 H -1,2,4-三唑-3(4 H)-硫酮(2)与N,N'-二芳基硫脲的反应生成相应的4- (N,N'-二芳基)胍基-2-甲基-5-甲硫基-2 H -1,2,4-三唑-3(4 H)-硫酮(7)–(10)。化合物(3)-(10)经历碱催化的环化,得到1,2,4-三唑并[4,3- b ] [1,2,4]三唑(11)-(18)。用三氟甲磺酸甲酯和三乙胺依次处理三唑-三唑(15)-(18),得到共轭的美苏木甜菜碱(23)-(26)。另一方面;
Trapping Reactive Intermediates by Mechanochemistry: Elusive Aryl<i>N</i>-Thiocarbamoylbenzotriazoles as Bench-Stable Reagents
作者:Vjekoslav Štrukil、Davor Gracin、Oxana V. Magdysyuk、Robert E. Dinnebier、Tomislav Friščić
DOI:10.1002/anie.201502026
日期:2015.7.13
revealed the formation of aryl N‐thiocarbamoylbenzotriazoles, reactiveintermediates deemed unisolable in solution. The first‐time isolation and structural characterization of these elusive molecules demonstrates the ability of mechanochemistry to access otherwise unobtainable intermediates and offers a new range of masked isothiocyanate reagents.
Various N-aryl-N'-phenylthioureas, N, N'-diarylthioureas and N-(1, 2, 4-triazol-3-yl)-N'-arylthioureas were prepared and examined for uncoupling activities. The results indicate that substitution at the 4-position of the phenyl groups of diaryl thioureas is very important for uncoupling activities. Diphenyl thioureas substituted with two or more halogen atoms exhibited strong activities. The highest activity was exhibited by a compound containing nitro groups on both phenyl groups. These results indicate that the hydrophobicity and acidic nature of the compound are of primary importance for uncoupling activities. A remarkable decrease in activity was observed with the thioureas which were substituted with pyridine and 1, 2, 4-triazole rings. The reaction of phenyl isothiocyanate with 3-amino-1, 2, 4-triazole was also studied.
[EN] CERAMIDE GALACTOSYLTRANSFERASE INHIBITORS FOR THE TREATMENT OF DISEASE<br/>[FR] INHIBITEURS DE LA CÉRAMIDE GALACTOSYLTRANSFÉRASE POUR LE TRAITEMENT DE MALADIES
申请人:BIOMARIN PHARM INC
公开号:WO2017214505A1
公开(公告)日:2017-12-14
Described herein are compounds, methods of making such compounds, pharmaceutical compositions and medicaments containing such compounds, and methods of using such compounds to treat or prevent diseases or disorders associated with the enzyme ceramide galactosyltransferase (CGT), such as, for example, lysosomal storage diseases. Examples of lysosomal storage diseases include, for example, Krabbe disease and Metachromatic Leukodystrophy.
Palladium catalyzed carbonylative annulation of the C(sp<sup>2</sup>)–H bond of <i>N</i>,1-diaryl-1<i>H</i>-tetrazol-5-amines and <i>N</i>,4-diaryl-4<i>H</i>-triazol-3-amines to quinazolinones
as both directing as well as intramolecular nucleophiles. The catalytically active C–H activated intermediate dimeric Pd complex was isolated and characterized which on exposure to CO gas gave the corresponding tetrazole fused quinazolinone derivative. On the basis of isolation of the intermediate and observed kinetic isotope effects, a mechanism has been proposed for the C–H activated direct carbonylative
Synthesis and Biological Evaluation of Halogenated 2-Arylimino-3-arythiazolidine- 4-ones Containing Benzoic Acid Fragments as Antibacterial Agents
作者:Jie Zhang、Likang Zheng、Huayong Liu、Dan Zhao、Di Qu、Shiqing Han
DOI:10.2174/15701808113109990031
日期:2013.10.1
A series of halogenated 2-arylimino-3-ary-thiazolidine-4-ones containing (5-furan-2-yl)-benzoic acid or (5-thiophene-2-yl)-benzoic acid fragments were synthesized, and evaluated in vitro for their antibacterial activity, antibiofilm activity, erythrocyte hemolysis and cytotoxicity. Compounds (7c, 7f, 7i, 7n and 7p) exhibited excellent potency in inhibiting the growth of Staphylococcus epidermidis ATCC35984 (minimal inhibitory concentration (MIC): 0.8 μg/mL). The five compounds also presented promising antibiofilm activity against S. epidermidis ATCC35984 and none of them showed obvious hemolytic activity and cytotoxicity. Further antibacterial effects of the selected five compounds (7c, 7f, 7i, 7n and 7p) against clinical isolates (methicillin-resistant Staphylococcus epidermidis and methicillin-resistant Staphylococcus aureus) were investigated in comparison with methicillin and ampicillin.7p showed the most potent antibacterial activities among the synthesized compounds.