3-烷氧基-3-烷基异吲哚啉-1-酮的合成

为探索3-亚烷基异吲哚啉-1-酮在有机合成中的应用潜力,构建新型的异吲哚啉-1-酮类化合物,本文以3-亚烷基异吲哚啉-1-酮和醇为原料,在三氯硅烷与路易斯碱催化剂作用下发生加成反应,得到一系列3-烷氧基-3-烷基异吲哚啉-1-酮类化合物,并初步尝试了以手性路易斯碱催化该反应。综上,本文建立了一种新型异吲哚啉-1-酮类化合物的合成方法,该方法条件具有温和、操作便捷、底物适用范围广和收率普遍较高的特点。     

DDQ介导的新型3-吲哚烷酮及吡喃酮并[2,3-b]吲哚类化合物的合成

以1-(1H-吲哚-3-基)戊烷-3-醇及其衍生物为底物,以三氟甲磺酸铜为催化剂,甲醇为溶剂,DDQ（2,3-二氯-5,6-二氰基对苯醌）为氧化剂,共合成9个新型的3-吲哚烷酮衍生物及5个结构新颖的吡喃酮并[2,3-b]吲哚衍生物,其结构经¹H NMR,¹³C NMR和HR-MS(ESI)表征。对反应机理进行了推测并通过同位素实验进行了验证,反应为碳正离子参与并经分子间和分子内的亲核加成形成碳-氧键的过程。      

3-吲哚基-3-甲硫基丙烯酸酯和3-吲哚基-3-氧代丙酸酯的选择性合成

在10℃,3,3-二甲硫基丙烯酸酯、吲哚和三氟乙酸(TFA)的物质的量之比为1∶1∶15时,研究了3,3-二甲硫基丙烯酸酯的吲哚化反应.通过控制产物在硅胶的停留时间选择性制备了3-吲哚基-3-甲硫基丙烯酸酯(83%~85%)和3-吲哚基-3-氧代丙酸酯(83%~89%).反应条件温和、操作简单、产率高且选择性好.     

5-(3-吲哚基)亚甲基噻唑烷-2,4-二酮衍生物的合成及体外抗肿瘤活性探索

将N-取代吲哚-3-甲醛和2,4-噻唑烷二酮通过亚甲基键合,再对噻唑烷二酮氮取代,合成了一系列5-(3-吲哚基)亚甲基噻唑烷-2,4-二酮衍生物(e1-e9).采用IR,1H NMR和HRMS对其结构进行了表征;采用MTT法对目标物抑制5种癌细胞增殖活性进行了测试.结果表明,所有目标物对A549、HCT116和PC-9表现出抑制活性,其中吲哚氮被苄基取代的化合物e1和e3对测定的癌细胞增殖抑制活性与5-氟尿嘧啶(5-FU)相近,并且对A549和HCT116表现出中等的抑制活性(IC50<30μM)。     

一种铜催化合成异吲哚啉-1-酮的方法

本文设计了一种以邻苯甲腈和苯乙炔为原料,在铜催化剂的作用下环化生成异吲哚啉-1-酮的反应方法.以邻溴苯腈和苯乙炔作为反应模板,对溶剂、碱添加剂、催化剂、反应时间和温度做了探索,确定最佳反应条件为:碘化亚铜(0.02 mmol),去氧水(0.6 mmol),叔丁醇钾(0.3 mmol),1,4-二氧六环(0.2 mol·L^-1),100℃反应6 h.在最优反应条件下,对不同的反应底物进行了一系列的研究,底物适用性良好.     

新型含吲哚基噻唑烷硫酮化合物的合成及其光学性质

以吲哚-2-甲酸为起始原料,经酰氯化后在三乙胺作用下与2-噻唑硫酮经缩合反应合成了一种新的含吲哚基噻唑烷硫酮化合物(3),其结构和光学性质经UV-Vis, FL, ¹H NMR, IR和X-射线单晶衍射表征。结果表明：3的最大吸收波长位于315 nm;在312 nm波长激发下,3在正己烷中的最大发射波长位于401 nm,荧光量子产率为0.16;在305 nm波长激发下,3的固体荧光最大发射波长位于476 nm。     

新型取代吲哚-3-甲醇类衍生物的合成

以取代吲哚为原料,经维尔斯迈尔-哈克反应制得取代吲哚-3-甲醛,再通过DMSO/NaOH体系制得N-取代吲哚-3-甲醛(3a~3g);3a~3g经Na BH4还原合成了7个未见文献报道的取代吲哚-3-甲醇类衍生物(4a~4g),其结构经~1H NMR,~(13)C NMR和MS表征。     

3-氨基-2-吲哚酮的新合成方法

以苯胺为原料,通过传统方法合成靛红。靛红与盐酸羟胺反应生成3-羟基亚氨基-2-吲哚酮,再通过钯碳加氢还原生成3-氨基-2-吲哚酮。合成中,采用钯碳加氢的还原方式,产物收率提高（收率82.76%,较文献提高了11.8%）,后处理更简单,而且该方法可操作性高,成本低,产生三废少,是一条适合大规模生产3-氨基-2-吲哚酮的新合成工艺路线。     

取代吲哚-3-甲醛类化合物的合成

取代邻硝基甲苯(1)、N,N-二甲基甲酰胺二甲基缩醛或二乙基缩醛和哌啶在溶剂N,N-二甲基甲酰胺中缩合制得取代的β-哌啶基-2-硝基甲苯(2), 2用铁粉和冰醋酸还原环合得到取代吲哚(3), 将3与三氯氧磷和N,N-二甲基甲酰胺通过Vilsmeier-Hacck反应制得了取代吲哚-3-甲醛类化合物4和5. 化合物4和5的结构经元素分析, IR和¹H NMR确认.     

3,3-二取代3-吲哚-3'-基氧化吲哚的立体选择性合成

以10 mol%(R,R)-环己二胺衍生的手性双功能硫脲叔胺(4b)为催化剂,3'-吲哚-3-氧化吲哚与α-氨基砜为原料,经3'-吲哚-3-氧化吲哚与原位生成的N-Boc芳香醛亚胺的不对称Mannich反应,合成了20个3,3-二取代3-吲哚-3'-基氧化吲哚类化合物(3a~3t),分离收率54%~98%,dr值90∶10~99∶1,其结构经~1H NMR,~(13)C NMR和HR-MS(ESI-TOF)表征。     

Regioselective Synthesis of Two Novel 2-geranyloxyacetophenones

The phenols containing geranyl units¹ are a large group of interesting natural products exhibited many physiological actions as antiflammatory, antibacterial and antioxidative activities². Two novel acetophenones 1 and 2 were recently isolated from the fruits of Evodia merrillii, a small folk medicinal tree widely distributed in Taiwan³. Their structures were elucidated as 2-(1'-geranyl)-4,6-dihydroxyacetophenone 1 and 2-(1'-geranyloxy)-2,6,α-trihydroxyacetophenone 2 by means of spectroscopic data. So far as we know, the total synthesis of them have not been reported yet. Herein, we wish to report the first total synthesis of 1 and 2,starting from 2,4,6-trihydroxyacetophenone.     

A Novel Synthesis of tert- Alkyl Sulfides

tert- Alkyl sulfides are conveniently prepared from α-(1H-benzotriazol-1-yl)alkyl sulfides by displacement of the 1H-benzotriazol-1-yl group with Grignard reagents. The 1-[α-(alkylthio)alkyl]- and 1-[α-(arylthio)alkyl]-1H-benzotriazole intermediates are easily available by several routes: (i) displacement of the halogen from appropriate halides by sodium salts of thiols, (ii) condensation of 1H-benzotriazole and thiols with carbonyl compounds, or (iii) lithiation of N-substituted 1H-benzotriazoles and subsequent treatment with electrophiles.     

Novel and Expedient Regioselective Synthesis of 2-Imino-3-methyl-2,3-dihydrothiazoles

Cyclization of α-tosyloxyacetophenones 1 and N-methylthiourea 2 in acidic medium affords a novel and expedient method to synthesize 2-imino-3-methyl-2,3-dihydrothiazoles 3 with excellent level of regiocontrol.     

A Novel Condensation Reaction of Alkyl Aryl Ketone with Ethyl Ortho-Formate under Microwave Irradiation

Thereisconsiderablecurrentinterestinorgamcreactionsunderndcrowaveirradiationl.SomereactionsthatneededalongtAnetocomplete(i.e.severalhoursorseveraldays)couldbecatriedoutinseveralminutesunderndcrowavepromotion'-',andasthecasemaybe,somellewreactionswerefound'.Generally,ketalsareusuallyobtainedwhenethylortho-formatereactswithvariousketonesunderacidiccondihons"',butinthesamesituaioftanabnormalreachonalsotookplaceundermicrowaveirmdiahon(75owx7o$5oHz),andaseriesofnewcompounds(5,6,7,8)wereobtainedfr…     

棉子糖乙烯酯的酶催化选择性合成研究

研究了无水毗啶中酶催化棉子糖和丁二酸二乙烯酯、己二酸二乙烯酯、癸二酸二乙烯酯的酯交换反应，高选择性地合成了3种具有不同链长的可聚合的棉子糖乙烯酯．化合物经^1H NMR，^13C NMR和2D NMR表征，确证主要在棉子糖的β-呋喃果糖残基的C-1位OH上酯化．考察了7种不同来源的酶催化棉子糖酯合成的活性及温度、时间对反应的影响．     

环己基甲酮类化合物的仿生合成新方法

以2位环己基取代苯并咪唑盐作为甲酸氧化态的四氢叶酸辅酶模型, 与亲核Grignard试剂作用, 将甲酸氧化态的一碳单元转移给亲核试剂, 成功地实现了6类具有潜在应用价值的环己基甲酮的绿色仿生合成, 其结构用元素分析、1H NMR、IR和MS等方法进行了表征, 并对反应机理和反应条件进行了讨论.     

Facile Synthesis of Novel Aminopyrrolobenzimidazole System via Regioselective Amination

A new series of substituted pryrrolobenzimidazoles have been prepared via regioselective displacement of chlorine atom from dichloropyrrolobenzimidazoles with various amine nucleophiles. The dichloro compounds were obtained from the reaction of ortho phenylene diamine compounds with dichloromaleic anhydride.     

Highly Regioselective Synthesis of Novel 4-O-Phosphorylated Paeonol Analogs

Abstract

4-O-phosphorylated paeonol derivatives were conveniently prepared by a facile method. Resacetophenone was prepared by the Friedel–Crafts acylation reaction of acetic acid with resorcinol. It was then phosphorylated regioselectively at the 4-O position using the Atherton–Todd reaction. An efficient, highly regioselective method to synthesize 4-O-phosphorylated paeonol derivatives is provided, and the approach has the merits of mild reaction conditions.

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.     

Regioselective Synthesis of Two Novel 4-alkenyloxy-2,6-dihydroxyacetophenones

Thephenolscontainingalkenylunitslarealargegroupofinterestingnaturalproductsexhibitingmanyphysiologicalfunctionssuchasantiflammatory,antibacterialandantioxidativeactivities2.Twonovelacetophenones1and2wererecentlyisolatedfromthefruitsofEvodiamerrillii,asmallfolkmedicinaltreewidelydistributedinTaiwan',andtheaerialpartsofBorroniaromosainAustraliangenusBoroniarespectively'.Theirstructureswereelucidatedas4-(l'-geranyl)-2,6-dihydroxyacet1and4-(l'-farnesyl)-2,6-dihydroxyacetophen2bymeansofspectrosco…     

新型噻吩并嘧啶酮类衍生物的合成及其抑菌活性

以1,2,4-三氮唑为起始原料,经取代、Gewald反应、Wittig反应和成环反应合成了7个新型的含氟噻吩并嘧啶酮类衍生物——2-二烷氨基-3-对氟苯基-5-甲基-6-(1H-1,2,4-三唑-1-基)-噻吩并[2,3-d]嘧啶-4(3H)-酮(6a~6g),其结构经1H NMR,MS和元素分析表征。抑菌活性测试结果表明:6对棉花枯萎菌、水稻纹枯菌、黄瓜灰霉菌、小麦赤霉菌、苹果轮纹及棉花炭疽具有较好的抑制作用,其中2-二异丁氨基-3-对氟苯基-5-甲基-6-(1H-1,2,4-三唑-1-基)-噻吩并[2,3-d]嘧啶-4(3H)-酮(6f)的抑菌活性最好,在用药量为5×10-5g·L-1时,对棉花枯萎菌的抑制率为85%。