4-(4-{5-[(二苄胺基甲酰)-甲基]-2-庚基-4-羰基-噻唑-3}-丁基)苯甲酸的合成研究

报道一个新型胰岛素增敏剂4-(4-{5-[(二苄胺基甲酰)-甲基]-2-庚基-4-羰基-噻唑-3}-丁基)苯甲酸的合成方法. 该化合物以对碘苯甲酸为原料, 经过羧基的保护、Heck反应、还原反应、Ing-Mnske反应、噻唑环合成、酰胺制备和羧酸保护基解除等一系列反应, 通过对反应条件的优化, 高产率合成4-(4-{5-[(二苄胺基甲酰)-甲基]-2-庚基-4-羰基-噻唑-3}-丁基)苯甲酸, 并对其中间体对碘苯甲酸叔丁酯的合成方法进行研究.     

达比加群酯中间体3-【【【2-{[(4-氰基苯基)氨基]甲基}-1-甲基-1H-苯并咪唑-5-基】羰基】(吡啶-2-基)氨基】丙酸乙酯的合成

以对氨基苯腈为起始原料,经胺化反应制得N-(4-氰基苯基)甘氨酸(4);4与N-[3-氨基-4-(甲基氨基)苯甲酰基]-N-2-吡啶-β-丙氨酸乙酯(5)经酰胺化后经闭环反应,合成了达比加群酯的关键中间体——3-【【【2-{[(4-氰基苯基)氨基]甲基}-1-甲基-1H-苯并咪唑-5-基】羰基】(吡啶-2-基)氨基】丙酸乙酯,总收率79.6%,其结构经~1H NMR和ESI-MS确证。     

特拉匹韦关键中间体{(1S,3AR,6AS)-八氢环戊并[c]吡咯-1-羧酸}的合成

设计了一条合成特拉匹韦重要中间体(1S,3AR,6AS)-八氢环戊并[c]吡咯-1-羧酸(8)的新路线。以4-甲基-5-咪唑基乙醇为原料,经N-烃化、串联加成环化、羰基还原、氨基保护和酯水解等8步反应合成8,总收率24.7%,其结构经1H NMR和MS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。     

3-[N-(4-甲基苯基)氨基羰基]-5-[4-(4-甲酸基苯甲氧基)苯亚甲基]-2,4-噻唑烷二酮的合成

以对甲苯胺和对甲基苯甲酸甲酯为起始原料,经NBS溴化、亲核取代、酸水解和Knoevenagel缩合等6步反应合成了抗细菌生物膜化合物—3-[N-(4-甲基苯基)氨基羰基]-5-[4-(4-甲酸基苯甲氧基)苯亚甲基]-2,4-噻唑烷二酮,总收率57.3％,其结构经1H NMR,ESI-MS和元素分析确证.     

N-(4-叔丁基-5-苄基噻唑-2-基)氨基乙酰胺的合成与抗肿瘤活性

采用衍生法,在N-[4-叔丁基-5-(4-氯苄基)噻唑-2-基]脂肪酰胺酰基的α-位,插入氨基,设计合成了N-(4-叔丁基-5-苄基噻唑-2-基)氨基乙酰胺衍生物.以4,4-二甲基-1-芳基-3-戊酮为原料,经4-叔丁基-5-苄基-2-氨基噻唑(3),再经氯乙酰化和取代反应得21个N-(4-叔丁基-5-苄基噻唑-2-基)氨基乙酰胺(1),其结构经~1H NMR、~(13)C NMR和元素分析确证.噻唑蓝(MTT)法体外抗肿瘤活性测试表明,该类新化合物对肺癌细胞(A549)、宫颈癌细胞(Hela)和乳腺癌细胞(MCF-7)具有抗肿瘤活性.其中N-[4-叔丁基-5-(胡椒基)噻唑-2-基]吗啉基乙酰胺(1t)对Hela细胞的抑制活性最好;对优选化合物1t进行了AO/EB双染和细胞周期实验,流式细胞仪分析表明,化合物1t可显著诱导肿瘤细胞凋亡,阻滞Hela细胞有丝分裂在S期.     

脂蛋白脂酶激活剂艾溴利平类似物的合成

合成了两个新型的艾溴利平类似物——N-2 -硝基-4-氯苯基-4-[(膦酸二乙酯基)甲基]苯甲酰肼(5,总收率28.1％)和N-2-四氮唑基-4-氯苯基-4-[(膦酸二乙酯基)甲基]苯甲酰胺(7,总收率30.5％).以对氯甲基苯甲酸为原料,经酯化、水解和酰氯反应制得中间体4-[(膦酸二乙酯基)甲基]苯甲酰氯(4);4与2-硝基-4-氯苯肼盐酸盐反应合成了5.4先与2-氨基-5-氯苯腈反应制得N-2-氰基-4-氯苯基-4-[(膦酸二乙酯基)甲基]苯甲酰胺(6);6再与叠氮化钠反应合成了7.其结构经1 H NMR和IR表征.     

抗丙肝药物维拉帕维的合成

以7-羟甲基-1-四氢萘酮和1-溴-4-氯-苯甲醛为起始原料,经14步反应合成了抗丙肝新药维拉帕维--甲基（2S）-1-【(2S,5S)-2-【9{2［（2S,4S）-1-（2R)-2-［（甲氧基羰基）氨基］-2-苯乙酰基-4-（甲氧基甲基）吡咯烷-2-基］-1H-咪唑 5 基} 1,11-二氢异色烯［4′,3′ :6,7］萘并［1,2-d］咪唑-2-基-5-甲基吡咯烷-1-基】-3-甲基-1-氧丁烷-2-基】氨基甲酸酯,总产率10.14%,其结构经¹H NMR和ESI-MS确证。     

偶氮和亚氨基团作为下垂螯合臂的新型杯[4]芳烃衍生物的合成及性质

以对叔丁基杯[4]芳烃为原料,经过取代、缩合等多步反应,合成了5个下缘同时含有偶氮和亚氨基团的新型杯[4]芳烃衍生物,其结构经IR、1H NMR、13C NMR和元素分析进行了表征.并通过UV/Vis光谱研究了其对金属离子的识别作用.结果发现化合物25,27-二羟基-26,28-二{2-[2-(N-(4-苯偶氮基-1-萘基)亚氨基次甲基)苯氧基]乙氧基}对叔丁基杯[4]芳烃(4c)对Al3+和Sn2+有较好的识别作用,而化合物25,27-二羟基-26,28-二{2-[2-(N-(4-(4-甲基苯偶氮基)-1-萘基)亚氨基次甲基)苯氧基]乙氧基}对叔丁基杯[4]芳烃(4e)可以专一性地识别Al3+,其与Al3+络合的物质的量比为1∶1.     

海兔毒素10关键合成子Dap的立体专一性合成

以N-丙酰基-(3R,4S)-3-甲基-4-苯基-2-羰基噁唑啉与N-(叔丁氧羰基)-S-脯氨醛为原料,经羟醛缩合反应合成了高立体专一性、具有三个手性中心的(4S,5S,2'R,3'R,2"S)-3-[3'-(N-叔丁氧羰基-2"-吡咯烷基)-3'-羟基-2'-甲基丙基)]-4-甲基-5-苯基-2-羰基噁唑烷酮(6);6脱去手性辅基,甲基化3'-羟基合成了抗肿瘤活性肽海兔毒索10的关键合成子--(2S,3S,2's)-3-(N-叔丁氧羰基-2'-吡咯烷基)-3-甲氧基-2-甲酸丙酸,其结构经1H NMR,13C NMR,m和MS表征.     

α-Amino acid derived enaminones and their application in the synthesis of N-protected methyl 5-substituted-4-hydroxypyrrole-3-carboxylates and other heterocycles

A new and simple synthesis of novel N-protected methyl 5-substituted-4-hydroxypyrrole-3-carboxylates, which exist in equilibrium with their 4-oxo tautomers, has been developed in two steps starting from N-protected α-amino acids. The key intermediates are enaminones, which can also be isolated, characterized, and used for the construction of other functionalized heterocycles, before they spontaneously decompose to pyrrole products. 4-Hydroxypyrroles are prone to partial aerial oxidation but can be efficiently alkylated or reduced to stable polysubstituted pyrrolidine derivatives.     

Specific intramolecular aromatic CH insertion of diazosulfonamides

The chemoselectivity in the intramolecular CH insertion of various diazosulfonamides has been experimentally studied. The results reveal that the aliphatic 1,4-, 1,5-, or 1,6-C(sp³)?H insertions of diazosulfonamides are not accessible, while the aromatic 1,5-C(sp²)?H insertion can be realized specifically by adjusting the diazo-adjacent group. In addition, the general chemoselectivities in the intramolecular CH insertions of diazosulfonyl compounds are summarized. Generally, diazosulfones undergo both aromatic 1,5-C(sp²)?H and aliphatic 1,5- and 1,6-C(sp³)?H insertions, while diazosulfonates undergo aliphatic 1,5- and 1,6-C(sp³)?H insertions. However, diazosulfonamides only undergo aromatic 1,5-C(sp²)?H insertion.     

N-Heterocyclic carbene-palladacyclic complexes: synthesis,characterization and their applications in the C-N coupling and α-arylation of ketones using aryl chlorides

N-Heterocyclic carbene-palladacyclic complexes 3 were successfully achieved in a one-pot procedure under mild conditions. The structure of 3a was unambiguously confirmed by X-ray single crystal diffraction and it was an active catalyst in the Buchwald-Hartwig amination and α-arylation of ketones even at very low catalyst loadings (0.01?mol%).     

Iodine-mediated oxidative Pictet-Spengler reaction using terminal alkyne as the 2-oxoaldehyde surrogate for the synthesis of 1-aroyl-β-carbolines and fused-nitrogen heterocycles

An efficient iodine-mediated oxidative Pictet-Spengler reaction in dimethyl sulphoxide (DMSO) using terminal alkynes as the 2-oxoaldehyde surrogate for the synthesis of aryl (9H-pyrido[3,4-b]indol-1-yl)methanones is described. The scope of the protocol includes the total synthesis of Fascaplysin, Eudistomins Y₁ and Y₂. The methodology is extended for preparing pyrrolo[1,2-a]-quinoxaline and indolo[1,5-a]quinoxaline derivatives. The utility of 1-aroyl-β-carbolines was demonstrated by performing palladium-catalyzed β-carboline directed ortho-C(sp2)-H functionalization of the phenyl ring with thiomethyl (SMe) group using DMSO as source and for accessing 4-aryl-canthin-6-ones.     

Facile synthesis of bicyclic 1-arylpyrazol-5-ones

In this Letter, we described a facile method for constructing fused bicyclic 1-arylpyrazol-5-one ring system. We employed various methylene-containing carboxylic acids as the substrates and proved that the pyrazolone ring closure requires activated methylene group in intermediate II. Accordingly, a series of structurally diversified, fused bicyclic 1-arylpyrazol-5-ones was prepared in moderate to high yields using the requisite substrates.     

Synthesis of pyrrolo[1,2-a]pyrazines and pyrazino[1,2-a]indoles by Curtius reaction in Morita-Baylis-Hillman derivatives

Synthesis of substituted pyrrolo[1,2-a]pyrazines and pyrazino[1,2-a]indoles from the Morita-Baylis-Hillman derivatives of acrylates via saponification followed by Curtius reaction is described.     

正丁胺对激光染料荧光谱影响的研究

用正丁胺作为碳源,采用射频辉光放电制备碳膜,选用激光染料R6G和聚乙二醇混合液作为蒸气源,采用单源热蒸发,在蒸发室与染料同时沉积得到混合膜,用拉曼光谱和红外光谱分析了碳膜的结构和键合方式,分析表明:碳膜中存在胺基团和氢原子.混合膜的荧光谱测量结果表明,认为正丁胺对染料荧光谱的影响是因为胺基和氢原子的存在.     

Cu0-catalysed 1,3-dipolar cycloadditions of α-amino acid derived N,N-cyclic azomethine imines to ynones

A series of 20 CuAIAC reactions between eight 4-acylamino substituted pyrazolidine-3-one-1-azomethine imines and four terminal ynones were performed using Cu⁰ as catalyst. The corresponding fluorescent cycloadducts were obtained in very high yields upon simple workup. Thus, Cu-metal turned out to be a better catalyst than Cu^I in terms of yield and ease of isolation. Availability of azomethine imines, mild reaction conditions, and simple workup enable a “click” access to libraries of densely substituted 2,3-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-1-ones. Reactivity of differently substituted dipoles was evaluated experimentally and by quantum chemical methods (DFT).     

Synthesis and antioxidative/anti-inflammatory activity of novel fullerene–polyamine conjugates

(E)-4-(Fullerenopyrrolidin-1-yl)-3-methylbut-2-enoic acid and its corresponding succinimidyl ester, readily obtained through Prato-type modification of C₆₀, were used for the selective N-acylation of polyamines. The thus obtained conjugates were evaluated for their antioxidative and anti-inflammatory activity and their cytotoxicity was determined. Members of this family of compounds showed interesting anti-lipid peroxidation, anti-lipoxygenase and anti-inflammatory activity and comparable cytocompatibility to spermidine.