一种基于罗丹明-硫脲类衍生物的新型活性染料的合成

首先以水合肼和异硫氰酸苯酯为原料,制得4-苯基-硫代氨基脲(M);再以罗丹明B和水合肼为原料,经闭环反应制备了罗丹明酰肼(1, RHa);然后在四氢呋喃溶剂中,化合物1在0~5 ℃条件下与三聚氯嗪经缩合取代反应,生成一缩产物罗丹明B酰肼-三聚氯嗪化合物(2, RHC);最后在氮气氛围下,化合物2进一步与M在45~50 ℃下回流,发生亲核取代反应生成文献尚未报道的新化合物--罗丹明B酰肼-三聚氯嗪-硫代氨基脲(3, RCP),其结构经¹H NMR、HRMS、IR和元素分析等表征确定。通过实验发现,RCP可在DMF-H₂O溶液[V(DMF)/V(H₂O)=1/1]中检测Hg²⁺,并且在5.0~9.0 μmol/L呈良好的线性关系。     

吡啶基三唑功能化罗丹明化合物的合成

以2-溴甲基吡啶氢溴酸盐和叠氮化钠为原料,合成中间体2-叠氮甲基吡啶（1）;对羟基苯甲醛和溴丙炔经取代反应合成中间体4-（丙-2-炔基丙氧基）苯甲醛（2）; 2与1经点击反应制得关键中间体BPT（3）; 3与罗丹明B酰肼经还原胺化反应得罗丹明类荧光探针,其结构经¹H NMR, IR和元素分析表征。     

合成盐酸氨溴索的新方法

以邻氨基苯甲酸甲酯（1）为起始原料,与溴素发生溴化反应制得2-氨基-3,5-二溴苯甲酸甲酯（2）。2经红铝试剂还原制得2-氨基-3,5-二溴苯甲醛（3）; 3经还原胺化制得氨溴索（4）; 4盐酸化得到盐酸氨溴索（5）,总收率60.8%,其结构经¹H NMR确证。     

一种新型罗丹明基衍生物分子的合成

以罗丹明B为起始原料,首先与乙二胺经闭环反应制得中间体罗丹明B乙二胺(1),在K₂CO₃作用下与三聚氯嗪经亲核取代反应制得罗丹明B乙二胺-三聚氯嗪化合物(2),收率75.8%; 2与亚氨基二乙酸在K₂CO₃作用下,经氮气保护进一步发生亲核取代反应合成了一种新型罗丹明基衍生物分子--罗丹明B乙二胺-三聚氯嗪-亚氨基二乙酸,收率63.3%,三步总收率45.5%,其结构经¹H NMR、 ¹³C NMR、 IR和HR-MS(ESI)表征。     

尼达尼布的合成新方法

以N-甲基-4-硝基苯胺作为起始原料,依次经氯乙酰化、取代及氢化还原反应制得关键中间体N-(4-氨基苯基)-甲基-2-(4-甲基-1-哌嗪基)乙酰胺（4）;以4-氯-3-硝基苯甲酸为原料,依次经酯化、取代、氢化还原及环合反应制得6-甲氧羰基-2-吲哚酮（8）; 8与原苯甲酸三乙酯和乙酸酐经“一锅煮”反应制得中间体1-乙酰基-3-甲氧基(苯基)亚甲烯基-2-氧代吲哚环-6-羧酸甲酯（9）; 4和9进行取代反应的同时脱除保护,经“一锅煮”反应合成尼达尼布,总收率57.2%,其结构经¹H NMR,¹³C NMR和MS(ESI)确证。     

新型含氮杂环的酰基硫脲衍生物的合成

以取代苯甲酸为原料,经酰氯化和酰化反应制得取代苯甲酰基异硫氰酸酯(3);3与2-氨基-4-对硝基苯基噻唑经加成反应合成了5个含氮杂环的苯甲酰基硫脲衍生物,其中3个为新化合物,其结构经1H NMR,IR和元素分析表征。     

新型2-吡啶苄基胺类罗丹明基活性小分子探针的合成

以罗丹明B和乙二胺为原料,通过缩合反应制得罗丹明酰乙二胺(1, Rhb);然后以无水THF作溶剂,化合物1与三聚氯嗪发生亲核取代反应,得到罗丹明酰乙二胺-三聚氯嗪化合物(2, Rhbc);最后在氮气氛围下,化合物2与N,N-二甲基吡啶胺反应合成了目标产物双(2 吡啶苄基) 胺罗丹明基小分子探针(3, Rhbd),其结构经¹H NMR、 IR、 HR-MS和元素分析表征。该探针可以识别Fe³⁺,检出限为30 nM。     

(S)-(4-溴-2-甲苯)(3-甲基吗啉)甲酮的合成

以(S)-2-氨基丙醇和氯乙酰氯为起始原料,经酰化和环合反应制得(S)-5-甲基吗啉-3-酮（4）; 4经还原制得(S)-3-甲基吗啉(5); 5与4-溴-2-甲基苯甲酸酰化缩合合成了(S)-(4-溴2-甲基苯基)(3-甲基吗啉)-甲酮,总收率57%,其结构经¹H NMR 和 ¹³C NMR确证。     

乐伐替尼的合成

以4-氨基-2-甲氧基苯甲酸甲酯为原料,与米氏酸、原甲酸三甲酯发生缩合得到4-[(2,2-二甲基-4,6-二氧代-1,3-二噁烷-5-亚甲基)氨基]-2-甲氧基苯甲酸甲酯(4),随后经环合、氯代、氨化反应生成4-氯-7-甲氧基喹啉-6-甲酰胺(7)。7与3-氯-4-氨基苯酚盐酸盐反应制得4-(4-氨基-3-氯苯氧基)-7-甲氧基喹啉-6-甲酰胺(8),最后与氯甲酸苯酯、环丙胺经一锅反应制得乐伐替尼。目标产物结构经核磁、质谱分析得到确证,总收率约34%(以4-氨基-2-甲氧基苯甲酸甲酯计)。改进后的工艺操作简单,降低了原料成本,且各步反应收率较高。     

单端与双端氨基聚乙二醇的制备

用Mitsunobu反应改进盖布瑞尔合成法,以邻苯二甲酰亚胺为原料,分别制得单端和双端取代的聚乙二醇衍生物（3和5）; 3和5经肼解反应制得单端和双端氨基取代的聚乙二醇,其结构经¹H NMR和MS（ESI）确证。     

5-甲基-3-喹喔啉-2-基-4-乙氧羰基异噁唑及其衍生物的合成

以α-氯代喹喔啉-2-甲醛肟(3)与乙酰乙酸乙酯的钠盐经1,3-偶极环加成制得关键中间体5-甲基-3-喹喔啉-2-基-4-乙氧羰基异噁唑(4). 以化合物4为原料在不同条件下, 合成了一系列新的1,3,4-噁二唑啉(7), 1,2,4-均三唑的Mannich碱衍生物10a～10f, 11a～11f, 12a～12f. 化合物的结构经元素分析, IR, 1H NMR和MS确认, 并对其波谱性质进行了讨论.     

Synthesis of c-17 trans β-lactams of the androstane series

3,3′-Ethylenedioxyandrost-4-en-17β-ol 1 was converted into the ethyl ester 2 by reaction with potassium metal and ethyl chloroacetate. The ethyl ester 2 on reaction with hydrazine gave the hydrazide 3 . Condensation of 3 with aryl aldehydes gave the Schiff bases 4 . The reaction of Schiff bases 4 with mono-chloroacetyl chloride in the presence of triethylamine afforded the β-lactams 5 .     

偶氮二甲酸二异丙酯的合成

以氯甲酸异丙酯、水合肼为主要原料,制备肼-1,2-二甲酸二异丙酯,然后用双氧水氧化制得偶氮二甲酸二异丙酯(DIAD)。 研究确定了最佳的反应条件:在0 ℃以下乙醚溶剂中,水合肼和氯甲酸异丙酯反应2 h,制备肼-1,2-二甲酸二异丙酯;n(肼-1,2-二甲酸二异丙酯)∶n(双氧水)=1:1.1,在-5~5 ℃下反应2 h,双氧水氧化得到偶氮二甲酸二异丙酯,总收率为90.7%,采用红外光谱、核磁共振等技术手段验证了中间体及目标产物结构。     

Synthesis of Some New Heterocycles of Pharmaceutical Interest: Pyridinyl and Isoxazolyl Quinoxaline Derivatives

3‐(p‐Acetyl‐anilinomethyl)quinoxalin‐2(1H)‐one ( 3 ) was prepared by the reaction of 3‐bromomethyl‐quinoxalin‐2(1H)‐one ( 1 ) with p‐aminoacetophenone ( 2 ) in pyridine. Reaction of p‐acetylcompound ( 3 ) with aromatic aldehydes yield the corresponding chalcones ( 4a‐c ). Condensation of latter chalcones with malononitrile afforded cyanopyridines ( 5a‐c ). Also, the reaction of chalcones ( 4a‐c ) with hydroxylamine hydrochloride furnished isoxazoles ( 6a‐c ). The reaction of bromo compound ( 1 ) with p‐aminobenzophenone yield ( 8 ) which was condenced with hydrazine hydrate to get the corresponding hydrazone derivatives ( 9 ). Some of the synthesized compounds have been screened for their antimicrobial activity against various strains of bacteria and fungi.     

Cycloaddition of Aroyl Isothiocyanate: A Novel Synthesis of Triazine,Oxazine, Pyrimidine,and Pyridine Derivatives

A simple and direct synthetic methodology for a novel series of azines and their annulated systems was performed. Heterocyclization of acyl isothiocyanate 2 with urea or malononitrile gave s‐triazine 4 and 1,3‐oxazine 7 derivatives, respectively. The reaction of heteroallene 1 with acetylacetone tolerated 2‐thioxopyridine derivative 9 . The latter compound underwent heterocyclization with urea, hydrazine hydrate, or phenyl hydrazine to give the annulated pyridines 10 – 12 . Pyrimidinethione 14 was resulted from reaction of acylisothiocyanate with enamine 13 . Condensation of compound 14 with hydrazine hydrate, phenyl hydrazine, urea, and 3‐nitrobenzaldehyde in the presence of ethyl cyanoacetate or sodium hydroxide afforded 15 – 20 , respectively.     

Researches on pyranes,their analogs,and related compounds

Condensation of 2, 4-diacetylphenol with diethyl oxalate serves as a basis for preparing 2-carbethoxy- and 2-carboxy-6-acetylchromones (I, II), 2-carbethoxy-6-ethoxyoxalyacetylchromone (V), and 2-carboxy-6-hydroxyoxalylacetylchromone (VI). The Mannich reaction is used to synthesize 6-(ω-dialkylaminopropionyl)-2-carboxychromones (VII, VIII) from compound I. Reaction of chromone-2-carbonyl chloride with enamines prepared from cyclohexanone and tetrahydrothiopyrone-4- gives syntheses of 2-(chromonoyl-2)cyclohexanone (III) and 3-(chromonoyl-2)tetrahydrothiopyrone-4 (IV). Hydrazine hydrate and compound III give the pyrazole derivative IX, while hydrazine hydrate and compound IV give pyrazole derivative X along with pyrazolylpyrazole derivative XI, which results from a second molecule of hydrazine hydrate opening the chromone ring. For Part XX see [11].     

Condensed Pyridine Bases. Synthesis and Reactions of Benzofuro[2,3-c]indeno[2,1-e]-, Benzothieno[2,3-c]Indeno[2,1-e]-, Benzofuro-[3,2-c]Indeno[2,1-e]- and Thieno[2,3:4′,5′]-thieno[3,2-c]indeno[2,1-e]pyridines

Condensation of hetarene carboxaldehydes with phthalide gave 2-(3-hydroxy-1-oxoinden-2-yl)benzo[b]furan and 2-(3-hydroxy-1-oxoinden-2-yl)-5-ethylthieno[2,3-b]thiophene. Starting from hetaryl acetic acids gave 3-(3-hydroxy-1-oxoinden-2-yl)benzo[b]furan and 3-(3-hydroxy-1-oxoinden-2-yl)benzo[b]thiophene. Acylation of 3-hydroxy-1-oxoinden-2-yl-substituted heterocycles using acetic anhydride in the presence of 70% HClO₄ leads to the formation of pentacyclic pyrilium salts. Pentacyclic indenopyridines are prepared by treating the pyrilium salts with ammonia. The reaction of the carbonyl group in the indenopyridines with hydroxylamine, hydrazine hydrate, and in reduction using NaBH₄ has been studied.__________Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 435–443, March, 2005.     

Fe3+-TiO2/SiO2光催化降解罗丹明B的研究

以硅胶为载体,采用溶胶-凝胶法制备了不同掺杂量的Fe3+-TiO2/SiO2光催化剂,并采用SEM,Raman和DRS等手段对其进行了分析和表征.以氙灯为光源,通过对可溶性染料罗丹明B的降解反应,考察了Fe3+-TiO2/SiO2催化剂的光催化活性,探讨了光催化反应中溶液pH值和起始浓度对催化反应的影响.