3-杂环基硫取代-1,3,4,5-四氢-2-氧代-苯并氮杂衍生物的合成

以芳酰肼为原料,合成了一系列3-巯基-5-芳基-1,2,4-三唑、2-巯基-5-芳基-1,3,4-噁二唑和2-巯基-5-芳基-1,3,4-噻二唑,并通过硫原子对3-溴-2-氧代-苯并氮杂3-位上的亲核取代反应将杂环化合物引入了苯并氮杂的结构当中,合成了32个新的苯并氮杂杂环衍生物.为提高其在有机溶剂中的溶解性,在苯并氮杂的N原子上引入乙酸乙酯和乙酸叔丁酯基取代基,合成了36个新衍生物.所有化合物经质谱、核磁共振谱及元素分析确证了结构并初步测定了抗菌活性.     

3-杂环基硫取代-1,3,4,5-四氢-2-氧代-苯并氮杂衍生物的合成

以芳酰肼为原料, 合成了一系列3-巯基-5-芳基-1,2,4-三唑、2-巯基-5-芳基-1,3,4-噁二唑和2-巯基-5-芳 基-1,3,4-噻二唑, 并通过硫原子对3-溴-2-氧代-苯并氮杂3-位上的亲核取代反应将杂环化合物引入了苯并氮杂的结构当中, 合成了32个新的苯并氮杂杂环衍生物. 为提高其在有机溶剂中的溶解性, 在苯并氮杂的N原子上引入乙酸乙酯和乙酸叔丁酯基取代基, 合成了36个新衍生物. 所有化合物经质谱、核磁共振谱及元素分析确证了结构并初步测定了抗菌活性.     

2-羟基-4-氯-1-苯氧基-9,10-蒽醌的合成及其光致变色性研究

报道了2-羟基-4-氯-1-苯氧基-9,10-蒽醌的合成,并通过元素分析、核磁共振谱、质谱和红外光谱确定了结构.通过紫外-可见光谱探讨了其光致变色性以及取代基对蒽醌类化合物光致变色性的影响.     

顺-1-环己基-3-酰氨基-4-取代苯基-2-氮杂环丁酮的合成

以取代苄叉氨基环己烷与Dane盐环化制备了23种新的单环β-内酰胺类化合物-顺-1-环己基-3-酰氨基-4-取代苯基-2-氮杂环丁酮. 并测定了合成的氮杂环丁酮类化合物的抗菌活性和抑制β-内酰胺酶的活性.     

3-取代-6-甲氧基-7-羟基-4Н-色烯-4-酮的合成及其异常反应

报道了3-位分别为苯基、氢原子以及卤素等不同取代的4Н-色烯-4-酮类化合物的合成方法,并探讨和阐明了一些意外产物的获得机理,不仅对该位点的进一步结构改造提供了物质基础,同时拓展了构建4Н-色烯-4-酮类化合物的底物结构.     

3-甲基-4-氨基-1,2,4-三唑-5-硫酮席夫碱的合成及生物活性研究

用自制的二氨基硫脲与乙酸反应得到3-甲基-4-氨基-1,2,4-三唑-5-硫酮, 然后以醋酸为反应溶剂和催化剂, 使之与取代芳香醛反应, 合成了8个三唑类席夫碱化合物. 通过¹H NMR, IR和元素分析对所有化合物进行了结构表征. 并对这些化合物进行了初步生物活性测试, 结果表明大部分化合物具有较好的抑菌活性, 并对席夫碱结构与活性的关系进行了探讨.     

6-取代苯氧基-7-氯-4-羟基-3-喹啉羧酸乙酯的合成及抗球虫活性研究

设计并合成了10个新的6-取代苯氧基-7-氯-4-羟基-3-喹啉羧酸乙酯类化合物; 合成路线短, 产率高, 原料易得, 易实现工业化; 所有化合物的结构均经¹H NMR, MS, IR和元素分析所证实; 并选择了其中7个化合物进行抗球虫活性实验, 结果表明: 其中4个6-取代苯氧基-7-氯-4-羟基-3-喹啉羧酸乙酯化合物具有抗球虫效果, 并有可能作为抗球虫药物使用.     

利用磷试剂制备2-[4,5-二氢化-4-甲基-4-异丙基-5-氧代-1H-咪唑啉-2-基]-苯甲酸的衍生物

本文报告了利用磷试剂制备2-氧代-3-甲基-3-异丙基-3H-咪唑并[2,1-a]-1-氧代-异吲哚及其异构体3-氧代-2-甲基-2-异丙基-2H-咪唑并[2,1-a]-1-氧代-异吲哚和2-[4,5-二氢化-4-甲基-4-异丙基-5-氧代-1H-咪唑啉-2-基]-N,N-二烷基-苯甲酰胺的新方法。本文方法具有反应条件温和、反应时间较短和收率较高等特点。     

3,6-二甲基-9-芳基-2,7-二氧杂-1,2,7,8,9,10-六氢-1,8-吖啶二酮衍生物的一步合成

以芳醛、6-甲基-4-羟基-2-吡喃酮、醋酸铵为原料, 醋酸为溶剂, 一步合成了一系列3,6-二甲基-9-芳基-2,7-二氧 杂-1,2,7,8,9,10-六氢-1,8-吖啶二酮, 产物的结构经红外、核磁、元素分析进行了表征, 并对反应过程提出了可能的机理.     

4′-取代苯并-15-冠-5-苦味酸分子络合物的核磁共振研究

研究了15种4＇-取代苯并-15-冠-5及其与苦味酸所形成的电荷转移络合物的~1H NMR,测定了其中12种络合物的络合常数。络合常数、参考线REL～[D]的斜率以及络合前后4＇-取代苯并-15-冠-5各类质子与笨并-15-冠-5相应的质子化学位移之差△σ均与Hammett取代基常数[σ_p σ_m]呈线性关系。根据取代基对各类质子化学位移变化的影响,讨论了有关化合物的结构与性能的关系。     

Chemistry of dioxine-annelated cycloheptatriene endoperoxides and their conversion into tropolone derivatives: an unusual non-benzenoid singlet oxygen source

The chemistry of two bicyclic endoperoxides, obtained by photooxygenation of 2,3-dihydro-7H-cyclohepta[1,4]dioxine and 2,3-dihydro-7H-cyclohepta[b][1,4]dioxin-7-one was investigated with the aim of synthesizing the respective tropolone derivatives. The reaction of these endoperoxides with base, thiourea and their thermolysis provided the desired tropolone derivatives in high yield. On the other hand, the thermolysis of the endoperoxide derived from 2,3-dihydro-7H-cyclohepta[b][1,4]dioxin-7-one underwent an unprecedented route and formed parent molecule and singlet oxygen instead of the expected troponoids. The formation mechanisms of all products are discussed.     

Quinazolines and 1,4-benzodiazepines XXXVI . The formation of 1,3-dihydro and 1,5-dihydro-1,4-benzodiazepines from tosyl and Mesyl - substituted 1,3,4,5-tetrahydro-5-phenyl- 1,4-benzodiazepine derivatives

The treatment of 4-sulfonyl derivatives of 5-phenyl-1,3,4,5-tetrahydro-1,4-benzodiazepin-2-ones (I) with base was shown to result in the formation of 1,3-dihydro or 1,5-dihydro-1,4-benzodiazepin-2-ones (III and II respectively) depending upon the conditions used. The base treatment of 1-sulfonyl substituted 2,3-dihydro-1,4-benzodiazepines (V) was shown to give the vinylimines VI.     

Photocycloadditions to 3-phenyl-1,2-benzisothiazole

Photocycloaddition reactions of 3-phenyl-1,2-benzisothiazole alkenes yield derivatives of 2,3-dihydro-1,4-benzothiazepine in one step reactions. The photoadditions are both regio and stereospecific.     

Reactions of β-sulfenyl α,β-unsaturated ketones with guanidine,Amidines, and diamines

β-Sulfenyl α, β-unsaturated ketones 1a-c reacted with guanidine or amidines to give pyrimidine derivatives 3 in 14-76% yields. Treatment of ketones 1 with diamines such as ethylenediamine and o -phenylenediamine afforded the seven-membered heterocycles, 2,3-dihydro-1,4-diazepine 5 and 2,3-benzo-1,4-diazepines 8a-c .     

Synthesis of Benzofuro[3,2-e][1,4]diazepines

A synthesis of 4-N-oxides and of 3-hydroxy derivatives of 1,3-dihydro-2H-benzofuro[3,2-e][1,4]diazepin-2-ones and of 2,3-dihydro-1H-benzofuro[3,2-e][1,4]diazepines is described. Condensation of 2-acetyl- and 2-benzoyl-3-ethoxycarbonylaminobenzofurans with acrylonitrile gave derivatives of 1,2-dihydro- and of 1,2,3,4-tetrahydrobenzofuro[3,2-b]pyridine.     

Reaction of Sulfene wild Heterocyclic N,N-Disubstituted α-Aminomethylene Ketones IV. Synthesis of 3,4-Dihydro-5H-[1]benzothiopyratio [3,4-e]-1,2-oxathiin and 2,3,6,7-Tetrahydro-5H-thiopyrano[3,4-e]-1,2-oxathiin Derivatives

The reaction of sulfene with N,N-disubstituted 3-aminomethylene-2,3-dihydro-4-thiochromanones and-2,3,5,6-tetrahydro-4-thiopyranones gave 1,4-cycloadducts which are derivatives of new heterocyclic systems, namely 3,4-dihydro-5H-[1]benzothiopyrano[3,4-e]-1,2-oxathiin and 3,4,7,8-tetrahydro-5H-thiopyrano[3,4-e]-1,2-oxathiin, respectively. Furthermore, some pyrazole derivatives VII and VIII were prepared from 3-hydroxymethylene-2,3-dihydro-4-thiochromanone or 2,3,5,6-tetrahydro-4-thiopyranone and hydrazines.     

Vinyl Ethers Containing an Epoxy Group: XXII. Synthesis and Base-Catalyzed Transformations of 1-(Allyloxy)- and 1-[2-(Vinyloxy)ethoxy]-3-(2-propynyloxy)propan-2-ols

Reactions of 2-(allyloxymethyl)- and 2-[2-(vinyloxy)ethoxy]methyloxiranes with 2-propynol (～3 wt % of t-BuOK, 75–85°C, 5–10 h) lead to formation of new 1-organyloxy-3-(2-propynyloxy)propan-2-ols (yield 65–95%). On heating to 45–100°C in the presence of bases (KOH, t-BuOK), 1-allyloxy- and 1-[2-(vinyloxy)ethoxy]-3-(2-propynyloxy)propan-2-ols are transformed into the corresponding 2-vinyl-1,3-dioxolane, 6-methyl-2,3-dihydro-1,4-dioxine, 6-methylene-1,4-dioxane, and 2,3-dihydro-5H-1,4-dioxepine derivatives, whose yield and ratio strongly depend on the solvent nature, catalyst, and substituent at the hydroxy group. 2-Vinyl-1,3-dioxolane and 6-methyl-2,3-dihydro-1,4-dioxine derivatives are formed as the major products (yield 70–99%) in the presence of t-BuOK in aprotic media (toluene, THF, DMSO) or in the absence of a solvent as a result of prototropic isomerization followed by intramolecular heterocyclization. Intramolecular nucleophilic cyclization of 3-(2-propynyloxy)propan-2-ols to 6-methylene-1,4-dioxane is the predominant process in water in the presence of KOH. In all cases, the fraction of 2,3-dihydro-5H-1,4-dioxepine derivatives among the cyclization products ranges from 0 to 5% (KOH) or to 14% (t-BuOK).     

Reaction of 2-bromomethyl-1,3-thiaselenole with thiourea: en route to the first representatives of 2-(organylsulfanyl)-2,3-dihydro-1,4-thiaselenines

The regioselective reaction of 2-bromomethyl-1,3-thiaselenole 1 with thiourea is accompanied by rearrangement, expanding the ring to afford the corresponding six-membered isothiuronium salt, 2-[amino(imino)methyl]sulfanyl-2,3-dihydro-1,4-thiaselenine hydrobromide 2, a synthon of the 2,3-dihydro-1,4-thiaselenin-2-ylthiolate anion. The latter was used for the synthesis of the first representatives of 2-(organylsulfanyl)-2,3-dihydro-1,4-thiaselenines 3a–g, bis(2,3-dihydro-1,4-thiaselenin-2-yl) disulfide 5 and 1,6-bis(2,3-dihydro-1,4-thiaselenin-2-ylsulfanyl)hexane 6.     

Synthesis of β-functionalized ethyl polyfluoroaryl sulfides, sulfoxides, and sulfones underlain by pentafluorobenzoic acid

The reaction of pentafluorobenzoic acid with 2-mercaptoethanol followed by modification of the reaction product by oxidationm halohydroxylation and (or) decarboxylation led to the formation of β-halo- and β-oxyethyl polyfluoroaryl sulfides, sulfoxides, and sulfones, initial compounds for the synthesis of fluorinecontaining 2,3-dihydro-1,4-benzothiazines, 2,3-dihydro-1,4-benzoxathiynes, and 2,3-dihydro-1,4-benzodithiynes and also of their S-oxides and S-dioxides based on intramolecular nucleophilic sybstitution.     

Synthesis of 2,3-dihydropyrido- and 2,3-dihydropyrimido-[1,4]diazepines from triaminopyridine and triaminopyrimidine

The reaction of 2,3,6-triaminopyridine 1 and 4,5,6-triaminopyrimidine 2 with one equivalent of the chal-cones 3, in acetic acid, leads to the formation of the 8-amino-2,3-dihydro-1H-pyrido[2,3-b][1,4]diazepine and 6-amino-2,3-dihydro-1H-pyrimido[4,5-b][1,4]diazepine derivatives 4 and 5 . The products were characterized by NMR techniques such as ¹³C, ¹H, and DEPT including selective ¹³C{¹H} decoupling experiments.