Synthesis of Novel 2-Iminothiazolidin-4-ones

Abstract

Thiazolidin-4-ones are known to exhibit diverse biological activities such as antimicrobial, anticancer, antidiarrheal, anticonvulsant, antidiabetic, antihistaminic, and antifungal activities. In the present investigation, a series of 2-haloacetamides was prepared by reacting chloroacetyl chloride with amines in dry benzene under reflux conditions. The formed 2-haloacetamides reacted with potassium thiocyanate in refluxing dry acetone to afford new 2-iminothiazolidin-4-ones. The 5-arylidene-2-imino-3 (napthalen-2yl)-thiazolidin-4-ones were prepared by condensing 2-iminothiazolidin-4-ones with substituted benzaldehydes. All the products were characterized by infrared, mass, and ¹H and ¹³C NMR techniques.     

噻唑烷-4-酮连假三糖的合成及其对T淋巴细胞增殖活性研究

以双叠氮基糖1、糖醛2和巯基乙酸为原料,室温条件下,利用Staudinger/aza-Wittig/环合一锅法反应,合成了新型噻唑烷-4-酮连假三糖衍生物3a和3b,并经脱苯甲酰基(Bz)保护基,分别得到了相应产物4a和4b.初步生物活性测试表明,化合物4a和4b能显著促进T淋巴细胞增殖,具有较强的免疫增强活性.     

An Efficient and Convenient Protocol for the Synthesis of Thiazolidin-4-Ones

Abstract

Without a catalyst and under solvent-free conditions, 2,3-disubstituted-1,3-thiazolidin-4-one 5a–j derivatives were synthesized efficiently via the three-component reaction of aryl hydrazide, aromatic aldehyde, and mercaptoacetic acid. All the newly synthesized compounds were confirmed by IR, ¹H NMR, and ¹³C NMR spectroscopy and elemental analysis.

GRAPHICAL ABSTRACT      

新型3-萘基-1,3-噻唑烷-4-酮衍生物的微波促进合成及其抗菌活性研究

利用微波促进的多组分一锅法, 在封管条件下, 以萘胺、芳醛和巯基乙酸为原料, 4-二甲氨基吡啶(DMAP)/N,N’-二环已基碳二亚胺(DCC)为催化剂, 合成了系列新的噻唑烷酮衍生物, 该反应具有时间短、操作简便等优点. 目标化合物通过IR, NMR, MS和元素分析等方法确定结构. 初步测试了化合物对丁香假单胞杆菌黄瓜角斑病菌致病变种、番茄灰霉病菌和黄瓜白粉病菌抑制活性, 结果表明: 部分化合物对黄瓜白粉病菌有显著抑制作用, 但对前两种植物病菌抑制效果不明显.     

Synthesis and Characterization of New Thiazolidin-4-one Derivatives

The synthesis of some new functionalized thiazolidin-4-one derivatives has been described. The N-substituted-thiosemicarbazides 3a-3i were obtained though the reaction of alkylamines 2a–2i , carbon disulfide, and hydrazine hydrate. The condensation reaction between 3a–3i and 4-amino-2-methanesulfanylpyrimidine-5-carboxaldehyde 1 afforded the thiosemicarbazones 4a–4i . The corresponding thiazolidin-4-ones 5a–5i were prepared by cyclization of 4a–4i with ethyl bromoacetate. The structures of the final products were confirmed by IR, ¹ H NMR, ¹³ C NMR, and HRMS.     

Synthesis and Antiproliferative Activity of Some 1H-Isochromen-1-ones and Their Thio Analogues

A series of 1H-isochromen-1-one derivatives and their thio analogues were synthesized by thionation using Lawesson's reagent for evaluation of their cytotoxic effect on cancer cells. The effect of these derivatives was tested on the growth of human epidermoid carcinoma A431 cell line by MTT [3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide] colorimetric assay. MTT assay revealed that these new compounds are potent inhibitors of cell growth.

Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements to view the free supplemental file.     

A Convenient Method for the Preparation of Linear Furoquinolin-2-ones

Fries rearrangement of 7-acetoxy-4-methylquinolin-2-one and subsequent condensation of the 6-acetyl-7-hydroxy-4-methylquinolin-2-one obtained with -chloro ketones gives a series of furo[3,2-g]quinolin-7-ones.     

(R)-N-乙酰四氢噻唑-2-硫酮-4-羧酸的合成和量子化学研究

（R）－N－乙酰四氢噻唑－2－硫酮－4－羧酸在三乙胺存在下同乙酰氯反应得到光学活性产物（R）－N－乙酰四氢噻唑－2－硫酮－4－羧酸．用半经验的量子化学方法研究反应物及产物的电子结构和反应热焓．     

N-2-多氟烷基乙基取代1,3,4-噁二唑-2-硫酮及1,2,4-三唑-5-硫酮类化合物的合成和密度泛函理论研究

为改善二唑及三唑类化合物的生物活性, 设计合成了一系列多氟烷基乙基取代的1,3,4-噁二唑-2-硫酮6a～6l及1,2,4-三唑-5-硫酮类化合物9a～9l. ¹H NMR, ¹⁹F NMR, IR和MS谱以及元素分析表征了它们的结构; 实验结果与Materials Studio 3.0中的Dmol3计算模块理论计算表明了唑环上的NH较之CONH中的NH更易进行烷基化反应.     

2-(2’,6’-二氯苯基)-1,3-噻唑烷-4-酮衍生物的微波促进合成及抗真菌、 抗肿瘤活性研究

利用微波促进的方法, 以2,6-二氯苯甲醛、胺和巯基乙酸为原料, 合成了系列N-3位不同取代基团的噻唑烷酮衍生物. 部分化合物在Lawesson试剂作用下, 合成了其系列噻唑烷4-硫酮衍生物. 所有化合物通过IR, 1H NMR, MS和元素分析等方法确定结构. 测试了化合物对黄瓜白粉病菌的抑制活性和对宫颈癌细胞的毒性作用, 部分化合物表现出较好的生物活性.     

1-烷基-4,6-二芳基四氢三嗪硫酮化合物的合成及其氧化反应

三芳基缩二胺与烷基硫脲在二氧六环回流条件下反应, 可生成1-烷基-4,6-二芳基四氢三嗪硫酮化合物3。利用芳香醛, 烷基硫脲和醋酸铵一锅法也能得到3, 而三芳基缩二胺与芳基硫脲反应, 则生成了咪唑啉的硫氰酸盐。室温下,在相转移催化剂TEBA存在时, 3可被高锰酸钾氧化, 得到1-烷基-4,6-二芳基-2(1H)三嗪酮化合物。     

Synthesis of substituted 2-amino-1,3-thiazine-6-thiones

The reaction of thiourea with l-acyl-2-bromoacetylenes in AcOH in the presence of BF₃·Et₂O affords 2-amino-4-phenyl(2-thienyl)-1,3-thiazine-6-thiones in high yields. Published inIzvestiya Akademii Nauk. Seriya Khimicheskaya. No. 11, pp. 1947–1949, November, 2000.     

N—烃氧丙酰基四氢噻唑—2—硫酮的合成

在三聚氯氰存在下由烃氧丙酸与四氢噻唑-2-硫酮反应得到N-烃氧丙酰四氢噻哇-2-硫酮(2a-i),由2a,c-h与格氏试剂反应得到烃氧乙基苯基酮(3a,c-h).产物2a-i未见报道.     

三氯锗取代丙酰氢化噻唑-2-硫酮类化合物及其水解产物的合成

某些有机锗化物,例如β-羧乙基锗倍半氧化物及其衍生物能诱发干扰素,对癌症有一定疗效,日本专利报道丙酰胺基锗倍半氧化物及其衍生物也具有抗癌活性^[2,3],白明章等曾合成丙酰芳胺基锗倍半氧化物^[4]。     

Synthesis of 1,3-dithiole-2-thiones and tetrathiafulvalenes using oligo-(1,3-dithiole-2,4,5-trithione). (Review)

Methods for the synthesis of 1,3-dithiole-2-thiones, based on [4+2] cycloaddition of the 1,3-dithiole-2,4,5-trithione oligomer to various unsaturated acyclic, carbocyclic, and heterocyclic compounds, are reviewed. Methods for the production of substituted tetrathiafulvalenes, which can be regarded as derivatives of bis(ethylenedithio)tetrathiafulvalene, from 1,3-dithiole-2-thiones synthesized by this method are described. Dedicated to the memory of Professor O. Neilands. __________ Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 4, pp. 483–502, April, 2006.     

Stereochemical trends of metal derivatives of some heterocyclic-2-thiones and thiosemicarbazones

The interaction of heterocyclic thiones/thiosemicarbazones with metals has been the subject of several investigations as these ligands contain chemically active groups,-N(H)-C(=S)-↔ -N=C(-SH)-,and are useful model compounds for sulphur-containing analogues of purine and pyrimidine bases. Heterocylic-2-thiones bind to metals in several ways and lead to the formation of monomeric or polymeric complexes. For example, the simplest prototype of heterocylic-2-thiones, namely, pyridine-2-thione has several ways of binding, notably, terminal S-bonding and S-bridging (in neutral form), while in anionic form the modes are terminal S-bonding, S-bridging, N,S-chelation, N,S-bridging, N,S-chelation-cum-S-bridging and N,S-bridging-cum-S-bridging. Similarly, thiosemicarbazones bind to metals as S-bonded unidentates or N,S-chelates. In this paper, the chemistry of pyridine-2-thione, its N-oxide, 2-(benzylthio)pyridine-1-oxide thione with metals like iron(II), ruthenium(II), nickel(II), palladium(II), platinum(II), copper(I), copper(II), silver(I) and mercury(II) is briefly described. As regards thiosemicarbazones, focus is only on two compounds, namely organomercury(II) and organothallium(III). A variety of new molecules, well characterised by NMR and X-ray crystallography, is introduced.     

3-取代吲哚酮类化合物的合成及抗癌活性研究

设计合成了9种未见报道的3-取代吲哚酮类化合物, 所有目标化合物的结构经1H NMR, IR, MS, 元素分析表征确证. 初步的生物学活性研究结果表明, 此类化合物对HL-60细胞系的增殖具有一定的抑制作用.     

5-取代吲哚-2-酮的合成

4-取代苯胺依次与水合氯醛及盐酸羟胺反应制得4-取代异亚硝基乙酰苯胺(2a～2e);2在浓硫酸作用下环合制得5-取代靛红(3a～3e);3通过改进的Wolff-Kishner-黄鸣龙反应合成了重要的药物中间体——5-取代吲哚-2-酮(5a～5e);5a通过硝化制得5-硝基吲哚-2-酮(5f);5f被还原制得5-氨基吲哚-2-酮(5g)。其结构经1H NMR和MS确证。