甲磺酸洛美他派的合成工艺改进

以9-芴甲酸为起始原料经亲核取代反应和N-酰基化反应制得N-(2,2,2-三氟乙基)-9-(4-溴丁基)-9H-芴基-9-甲酰胺(4);4'-(三氟甲基)-[1,1'-联苯]-2-羧酸与N-叔丁氧羰基-4-氨基哌啶反应制得中间体N-(1-叔丁氧羰基哌啶-4-基)-4'-(三氟甲基)-[1,1'-联苯]-2-甲酰胺(7);7在4 mol·L-1HCl二噁烷溶液中脱除保护基制得N-(哌啶-4-基)-4'-(三氟甲基)-[1,1'-联苯]-2-甲酰胺盐酸盐(8);8与4在K2CO3作用下反应制得洛美他派(9);9与甲磺酸经成盐反应合成了甲磺酸洛美他派,总收率36.4%,其结构经1H NMR,IR和HR-ESIMS确证。     

新型CCR5拮抗剂——N-【1-{5-溴-2-[(4-氯苄基)氧基]苄基}-4-哌啶基】-N-乙基吡啶甲酰胺的合成

以5-溴水杨醛和4-氯苄氯为原料,通过消去、还原及溴化反应制得中间体4-溴-2-溴甲基-1-[(4-溴苄基)氧]苯(3);哌啶-4-酮经Boc保护、还原等4步反应制得中间体N-乙基-N-(4-哌啶基)吡啶甲酰胺(7);3与7通过消去反应合成了一种新型CCR5拮抗剂——N-【1-{5-溴-2-[(4-氯苄基)氧基]苄基}-4-哌啶基】-N-乙基吡啶甲酰胺,其结构经1H NMR,13C NMR和ESI-MS表征。     

N-丁基-4-[乙基-(3-甲基苯基)氨基]丁酰胺的合成

以γ-丁内酯为起始原料,经开环氯化和酰化反应制得N-丁基-4-氯丁酰胺(2);2与N-乙基间甲苯胺经N-烷基化反应合成了N-丁基-4-[乙基-(3-甲基苯基)氨基]丁酰胺,总收率74.6%,纯度97.6%,其结构经1H NMR和MS(ESI)确证。     

9-乙酰氧基乙基-6-烷氨基-2-烷硫基嘌呤的合成及抗血小板凝集活性评估

以2-氨基-6-氯嘌呤(1)为原料,与2-溴乙基乙酸酯反应得到9-乙酰氧基乙基-2-氨基-6-氯嘌呤(2);2经重氮-烷硫化得到9-乙酰氧基乙基-2-烷硫基-6-氯嘌呤(3);3经胺解反应得到14个未见报道的9-乙酰氧基乙基-6-烷氨基-2-烷硫基嘌呤化合物4.这些化合物的结构经IR,1H NMR,13C NMR及HRMS得到表征,同时进行了抗血小板凝集活性测试.     

3,4-二氫化雜二氮[1,3]萘-酮-[4]Ⅰ.3-(ω)-二烷氨基-烷基)-3,4-二氫化雜二氮[1,3]萘-酮-[4]的合成

隣氨基苯甲酸与N-(β-二乙氨基-乙基)-甲酰胺或N-(δ-二乙氨基-α-甲基-正丁基)甲酰胺缩合,分别形成3-(β-二乙氨基-乙基)3,4-二氢化杂二氮[1,3]萘-酮-[4]与3-(δ-二乙氨基-α-甲基-正丁基)3,4-二氢化杂二氮[1,3]萘-酮-[4]。 5-氯代-隣位氨基苯甲酸舆N-(β-二乙氨基-乙基)-甲酰胺或N-(δ-二乙氨基-α-甲基-正丁基)-甲酰胺缩合,分别形成6-氯代-3-β-二乙氨基-乙基-3,4-二氢化杂二氮[1,3]-萘酮-[4]及6-氯代-3-(δ-二乙氨基-α-甲基-正丁基)-3,4-二氢化杂二氮[1,3]萘酮-[4]。     

1,3,2-氧氮磷杂环戊烷衍生物(Ⅱ)——2-二乙氨基-3-取代甲酰基-1,3,2-氧氮磷杂环戊烷衍生物的合成及其性质研究

用六乙基亚磷酰胺与N-(β-羟基乙基)取代甲酰胺进行成环反应,合成了一系列新的有机磷杂环化合物,2-二乙氨基-3-取代甲酰基-1,3,2-氧氮磷杂环戊烷,然后与硫作用生成2-硫逐代衍生物,亦可不经分离一步完成上述反应。     

4-(N-乙基-3-甲基苯胺基）丁酸甲酯的合成

以γ-丁内酯为起始原料,经开环氯化和醇解反应合成4-氯丁酸甲酯（2）; 2与N-乙基间甲苯胺经亲核取代反应合成了4-(N-乙基-3-甲基苯胺基）丁酸甲酯,纯度97.5%,总收率75.3%,其结构经¹H NMR确证。     

5-乙基-2-吲哚酮的合成及其酰基化和N上烃基化反应研究

以4-乙基苯胺1为原料,经Sandmeyer反应得5-乙基靛红2;2经水合肼还原得到5-乙基-2-吲哚酮3;N,N-二甲基甲酰胺与三氯氧磷先形成Vilsmeier-Haack试剂,再与化合物3反应,合成2-氯-5-乙基-3-乙酰吲哚4;以丙酮为溶剂,对化合物4烃基化,以78.5%-95.6%的收率得到N-取代-2-氯-5-乙基-3-乙酰吲哚5a-5e。其中化合物4、5a-5e均未见文献报道,它们的结构均通过红外光谱、核磁共振氢谱(碳谱),质谱等确认。     

N-丙基-N-[2-(2,4,6-三氯苯氧基)乙基]-1H-咪唑-1-甲酰胺的合成

以2，4，6-三氯苯酚和1，2-二氯乙烷为初始原料，在相转移催化剂十六烷基三甲基溴化胺和弱碱性助剂三乙胺存在下合成了N-丙基-N-[2-(2，4，6-三氯苯氧基)乙基]-1H-咪唑-1-甲酰胺，其结构经元素分析,IR，^1H NMR分析证实。并对该合成路线的反应机理进行了讨论。     

无催化剂条件下4-羟基烷基-2-炔酸乙酯与N-杂环芳基甲基-N-2,2-二氟乙基-1-胺的串联反应（英文）

开发了无催化剂条件下4-羟基烷基-2-炔酸乙酯与N-杂环芳基甲基-N-2,2-二氟乙基-1-胺的串联反应.应用该反应在甲醇中回流,以39%～83%的收率合成了一系列4-(N-(2,2-二氟乙基)(N-杂环芳基甲基)氨基)-5,5-二取代呋喃-2(5H)-酮,其结构经¹H NMR, ¹³C NMR和HR-ESI-MS表征,并进一步通过3-氯-4-((N-2,2-二氟乙基)(N-嘧啶-5-基甲基胺基)-5,5-螺(4-甲氧基环己基)呋喃-2(5H)-酮(8)的晶体衍射间接证实.测试了所合成化合物的生物活性,结果表明,在600μg·mL^-1浓度时4-((N-2,2-二氟乙基)(N-6-氯吡啶-3-基甲基胺基)-5,5-二甲基呋喃-2(5H)-酮(3a)和4-((N-2,2-二氟乙基)(N-6-氟吡啶-3-基甲基胺基)-5,5-二甲基呋喃-2(5H)-酮(3c)对桃蚜的死亡率均为100%.     

二氧化碳和丙烯直接合成甲基丙烯酸的NiPMo/TiO2催化剂的研究

用溶胶-凝胶法以磷钼酸(MPA)的镍盐溶液水解钛酸四丁酯制备了NiPMo/TiO2催化剂.使用ICP、 XRD、 TG-DTA、 IR、 TPD-MS和微反应技术研究了催化剂的化学组成、热稳定性、化学吸附性质和催化反应性能.杂多钼酸盐与TiO2通过O2-在TiO2表面发生了键合.在623 K下,杂多阴离子仍保持原有的Keggin结构.CO2在Lewis酸位Ni(Ⅱ)和Lewis碱位Ni-O-Mo的桥氧协同作用下生成CO2卧式吸附态Ni(Ⅱ)←O-(CO)←(O--Ni).丙烯有多种吸附态在催化剂上吸附.在563 K、 1 MPa和空速1500 h-1的反应条件下,丙烯的摩尔转化率为3.2%,产物MAA选择性为95%.     

Synthesis of 1-benzyloxypyrazin-2(1H)-one derivatives

Different approaches for the synthesis of 1-benzyloxypyrazin-2(1H)-one derivatives from simple amino acids have been investigated. A library of 33 precursors for the preparation of N-hydroxy pyrazinones was obtained in moderate to good yields.     

Toward new camptothecins. Part 6: Synthesis of crucial ketones and their use in Friedländer reaction

In the context of the preparation of camptothecin and luotonin A analogs, the synthesis of some key keto-precursors and their use in Friedländer condensation are described. This paper also focuses on the stability of these keto intermediates and emphasizes the major differences between indolizinones and pyrroloquinazolinones series. Noteworthy is also the report of some original structures isolated as by-products of some experiments.     

CoFe2O4自形成磁性液体场致结构化对磁化的影响

The Langevin paramagnetic theory can’t describe the relation between magnetization of ferrofluids and applied magnetic field. The structuralization of ferrofluids, which is considered the main influence factor of the magnetization, is regarded. The part of magnetization works is deposited when the structure is forming. This action influences the magnetization of ferrofluids directly or indirectly. On the base of the “compressing” model, the Langevin function that usually describes the magnetization of ferrofluid is modified, and a well-fitted curve is obtained. An equation of the relation between the equivalent volume fraction after being “compressed” and the intensity of magnetic field is discovered, which approximately describes the process of magnetization. The relation between the approximate initial susceptibility and the volume fraction can be obtained from modified formula.     

Highly regioselective Buchwald–Hartwig amination at C-2 of 2,4-dichloropyridine enabling a novel approach to 2,4-bisanilinopyridine (BAPyd) libraries

The highly regioselective Buchwald–Hartwig amination at C-2 of the cheap and readily accessible reagent, 2,4-dichloropyridine with a range of anilines and heterocyclic amines is described. This new methodology is robust and provides a facile access to 4-chloro-N-phenylpyridin-2-amines on 0.25 mol scale. These intermediates undergo a further Buchwald–Hartwig amination at higher temperature to enable rapid exploration of the chemical space at C-4 and to provide a library of 2,4-bisaminopyridines.     

KMnO4-mediated oxidative CN bond cleavage of tertiary amines: Synthesis of amides and sulfonamides

KMnO₄-mediated oxidative CN bond cleavage of tertiary amines producing secondary amine was introduced, which was trapped by electrophiles (acyl chloride and sulfonyl chloride) to form amides and sulfonamides. The reaction could take place at mild condition, tolerating a wide range of function groups and affording products in moderate to excellent yields.     

Chemistry of heterocyclic compounds at the A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, over 50 years (Review)

The review contains a concise historical account and information on the most significant researches undertaken by the staff at the A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences on the Chemistry of Heterocyclic Compounds. Dedicated to Academician of the Russian Academy of Sciences B. A. Trofimov on his 70th jubilee. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1443–1502, October, 2008.     

A general and convenient synthesis of 4-(tosylmethyl)semicarbazones and their use in amidoalkylation of hydrogen,heteroatom, and carbon nucleophiles

A general synthesis of previously unknown semicarbazone-based α-amidoalkylating reagents, 4-(tosylmethyl)semicarbazones, has been developed. The synthesis involved three-component condensation of semicarbazones of aliphatic or aromatic aldehydes with the same or other aldehydes and p-toluenesulfinic acid. The scope and limitations of this reaction were investigated. The compounds obtained were demonstrated to be an efficient α-(4-semicarbazono)alkylating agents. They were reacted with H- (sodium borohydride), O- (sodium methylate), S- (sodium phenylthiolate), N- (pyrrolidine, sodium succinimide), P- (trialkyl phosphites), and C-nucleophiles (sodium diethyl malonate) to give the corresponding products of the tosyl group substitution, 4-substituted semicarbazones, including analogues of nitrofurazone. Among the prepared compounds tested in vitro for antibacterial and antifungal activity, three nitrofuryl-containing semicarbazones exhibited high biological activities with minimum inhibitory concentration (MIC) values of 8–32 μg/mL.     

Sulfur-directed metal-free and regiospecific methyl C(sp3)–H imidation of thioanisoles

Regiospecific and direct imidation of the methyl C(sp³)–H bond of thioanisoles is realized under mild and metal-free conditions with N-fluorobis(benzenesulfonyl)imide as an oxidant and nitrogen source. Proposed mechanism suggests that thionium ion intermediates and a Pummerer-type reaction are involved. The imidation has advantages such as high step-economy, excellent functionality tolerance, and regiospecificity, giving structurally diverse imidation products.     

Synthesis of novel chiral bidentate hydroxyalkyl-N-heterocyclic carbene ligands and their application in palladium-catalyzed Mizoroki–Heck couplings and asymmetric addition of diethylzinc to benzaldehyde

A small library of new chiral bidentate hydroxyalkyl-imidazolium salts 1 is conveniently synthesized on multi-gram scale from inexpensive and commercially available chiral pool amino acids. The corresponding carbenes, generated by deprotonation of imidazolium salts 1, in combination with palladium(II) chloride were tested in the Mizoroki–Heck coupling reaction. The most significant results in terms of yields and reactivities were achieved with low catalyst loading. The catalytic activities of these imidazolium salts were also investigated in the asymmetric addition of diethylzinc to benzaldehyde. The use of MgO nanoparticles as an additive in conjunction with these ligands played a crucial role in increasing the efficiency of these reactions.