4-氨基-5-氯-2-乙氧基苯甲酸的合成

目的合成4-氨基-5-氯-2-乙氧基苯甲酸。方法以对氨基水杨酸钠为原料,经酸化、甲酯化、乙酰化、乙基化、氯代、水解等六步反应得到枸橼酸莫沙必利的主要中间体4-氨基-5-氯-2-乙基苯甲酸。结果与结论本合成工艺提高了收率,降低了成本,更适合工业化生产,本工艺总收率为62.4%。     

2-[4-[(4-氯苯基)苯甲基]-1-哌嗪基]乙醇的合成

目的制备2-[4-[(4-氯苯基)苯甲基]-1-哌嗪基]乙醇。方法以氯苯和苯甲酰氯为起始原料,经付克反应、还原、氯化,再分别与哌嗪、氯乙醇、氯乙酸钠缩合,得到最终产物。结果合成目标产物的总收率为49.1%,中间体4-氯双苯酮,4-氯双苯甲醇,4-氯双苯氯甲烷,1-[(4-氯苯基)苯甲基]哌嗪为鲁南贝特制药有限公司生产确证。结论通过对合成路线的优化,使生产收率提高,降低成本,工艺更适于工业化的生产。     

2-[(吡啶-4-基)甲基氨基]-N-[4-(三氟甲基)苯基]苯甲酰胺的合成工艺研究

目的合成2-[(吡啶-4-基)甲基氨基]-N-[4-(三氟甲基)苯基]苯甲酰胺(Ⅰ)。方法以邻硝基苯甲酸为起始原料,经氯代、氨解、水合肼还原、缩合、硼氢化钠还原共5步反应合成得到目标化合物Ⅰ。结果与结论经5步反应合成了目标化合物Ⅰ,其结构经核磁共振氢谱、质谱确证。改进后的合成工艺反应条件温和,操作简便,收率可达54.5%。     

4-[2-（2-氨基-4，7m二氢-4-氧-1H-吡咯[2，3-d]嘧啶-5-基）乙基]苯甲酸的中试生产

目的：研究培美曲塞二钠的关键中间体4-[2-（2-氨基4,7-二氢4-氧-1H-吡咯[2,3-d]嘧啶-5-基）乙基]苯甲酸的放大生产。方法：以对碘苯甲酸甲酯为起始原料,经缩合、溴代、环合、水解等反应得到制备培关曲塞二钠的关键中间体。结果：总收率约36．8％,本方法操作简单,收率稳定,适合工业化生产。     

4-［2-(2-氨基-4，7-二氢-4-氧-1H-吡咯［2，3-d］嘧啶-5-基)乙基］苯甲酸的中试生产

目的:研究培美曲塞二钠的关键中间体4-[2-(2-氨基-4,7-二氢-4-氧-1H-吡咯[2,3-d]嘧啶-5-基)乙基]苯甲酸的放大生产.方法: 以对碘苯甲酸甲酯为起始原料,经缩合、溴代、环合、水解等反应得到制备培美曲塞二钠的关键中间体.结果:总收率约36.8%,本方法操作简单,收率稳定,适合工业化生产.     

1,3-二甲基-6-[2-(对甲苯磺酰氧基)乙基氨基]尿嘧啶的合成

目的:合成盐酸尼非卡兰中间体1,3-二甲基-6-[2-(对甲苯磺酰氧基)乙基氨基]尿嘧啶.方法:以二甲基脲和氰乙酸为原料经3步反应合成目标产物.结果:以氰乙酸计,总收率44.4%.目标产物的光谱数据与文献报道一致.结论:新的合成方法所用原料价廉易得,适合生产.     

抗阿尔茨海默病药物2-羟基-5-[2-(4-(三氟甲基苯基)乙基氨基)]苯甲酸的合成

目的:合成2-羟基-5-[2-(4-(三氟甲基苯基)乙基氨基)]苯甲酸。方法:以对三氟甲基氯苯和5-氨基水杨酸为起始原料通过5步反应合成了细胞坏死抑制剂2-羟基-5-[2-(4-(三氟甲基苯基)乙基氨基)]苯甲酸。结果与结论:目标产物结构经1H-NMR,13C-NMR和ESI-MS确证,总产率为37.7%。该合成路线具有原料价廉易得、反应条件温和、收率高、操作简便的特点,适合于工业化生产。     

1-[3-(3-苄基-4-乙氧基苄基)-4-氯苯基]-1,6-二脱氧-β-D-吡喃葡萄糖的合成工艺研究

目的 设计并合成1-[3-（3-苄基-4-乙氧基苄基）-4-氯苯基]-1,6-二脱氧-β-D-吡喃葡萄糖。方法 以5-溴-2-氯-4'-乙氧基二苯甲烷为原料,通过Friedel-Crafts酰基化、还原、亲核加成、还原乙酰化、脱乙酰化反应的得到目标化合物。结果 根据理化性质和波谱数据鉴定了目标化合物的结构,总收率为32%,质量分数为98.48%。结论 1-[3-（3-苄基-4-乙氧基苄基）-4-氯苯基]-1,6-二脱氧-β-D-吡喃葡萄糖的合成为tianagliflozin中杂质的研究提供了方便。     

3-(2′-氯-6′-氟苯基)-5-甲基-4-异噁唑甲酰氯的合成

目的 研究抗生素氟氯西林钠的关键中间体3-(2'-氯-6'-氟苯基)-5-甲基-4-异噁唑甲酰氯的合成方法,使之适合工业化生产.方法 以2-氯-6-氟苯甲醛为原料,经肟化、氯化、环合、水解、酰氯化等步骤制得目标化合物.结果 合成产物的化学结构经IR,1H-NMR,13C-NMR and MS确证,总收率为60.2%.结论 此方法收率高,成本低,适合工业化生产.     

4-甲基-2-正丙基-6-甲氧羰基苯并咪唑的合成

目的：合成抗高血压药替米沙坦的重要中间体4-甲基-2-正丙基-6-甲氧羰基苯并咪唑.方法：以3-甲基-4-氨基苯甲酸甲酯为原料,经酰化、硝化、还原、环合4步反应制得目标化合物.结果：文献报道的相应各步反应条件得以优化,产率由39.6%提高到62.54%.结论：本方法简化了操作步骤,优化了反应条件,降低了成本,提高了收率.     

2-氨基-2-[2-(4-正辛基苯基)乙基]-1,3-丙二醇盐酸盐的合成工艺改进

目的 合成新型免疫抑制剂2-氨基-2-[2-（4-正辛基苯基）乙基]-1，3-丙二醇盐酸盐（FTY-720）。方法 以苯和正辛酰氯为起始原料，经傅克酰基化、还原、酰化、缩合、还原羰基、还原酯基、去乙酰化和成盐反应得到目的化合物FTY-720，总收率为12．0％。结果与结论 目标化合物的结构经^1H-NMR、IR和MS确证，中间体的^1H-NMR谱和mp值与文献值相符。该合成路线成本低廉，操作简单。     

Synthesis, antiproliferative, and antiviral activity of certain 4-substituted and 4,5-disubstituted 7-[(1,3-dihydroxy-2-propoxy)methyl]pyrrolo[2,3-d]pyrimidines

The sodium salts of 4-chloro- and several 4-chloro-5-substituted-7H-pyrrolo[2,3-d]pyrimidines were treated with [1,3-bis(benzyloxy)-2-propoxy]methyl chloride (6) to provide the corresponding 4-chloro- and 4-chloro-5-substituted-7-[[1,3-bis(benzyloxy)-2-propoxy]methyl]pyrrolo [2,3-d]pyrimidines (7-11). Debenzylation with boron trichloride at -78 degrees C furnished 4-chloro- and several 4-chloro-5-substituted-7-[(1,3-dihydroxy-2-propoxy)methyl]pyrrolo[2,3- d]pyrimidines (12.16). Subsequent amination of 12-16 yielded the 4-amino-5-substituted-7-[(1,3-dihydroxy-2-propoxy)methyl]pyrrolo[2,3- d]pyrimidines (17-21). Treatment of 14 with methylamine and 13 and 14 with ethylamine yielded the 4-(alkylamino)-5-halo-7-[(1,3-dihydroxy-2- propoxy)methyl]pyrrolo[2,3-d]pyrimidines (22-24). Treatment of 12-15 with hydroxylamine in refluxing 2-propanol yielded the 5-substituted-4-(hydroxyamino)-7-[(1,3-dihydroxy-2-propoxy)methyl]pyrrol o [2,3-d]pyrimidines (25-28). Treatment of compound 12 with Pd/C under a hydrogen atmosphere has furnished the nebularine analogue 31. The antiproliferative activity of compounds 17-28 and 31 was studied using L1210 cells in vitro. The 4-amino- and 4-(hydroxyamino)-5-halogenated derivatives (compounds 18-20, 26-28) inhibited cell growth. Although the effect of compounds 18-20 and 27 on final growth rate was pronounced (IC50 = 2.3, 0.7, 2.8, and 3.7 microM, respectively), cells underwent at least one doubling before cell division stopped. The remaining compounds were less cytotoxic, with IC50's greater than 30 microM for 21, 23, 26, and 28, whereas no inhibition of L1210 cell growth was observed with compounds 17, 22, 24, 25, and 31 at 100 microM. The antiviral activity of these compounds also was tested. Compounds 18-20 and 26-28 were active against human cytomegalovirus and herpes simplex type 1. The 4-amino derivatives (18-20) were more active than the 4-hydroxyamino derivatives (26-28), the 4-amino-5-bromo and 4-amino-5-iodo derivatives produced more than five log reductions in virus titer at concentrations of 10-100 microM. Although some cytotoxicity was observed at these concentrations, compound 19 was active against murine cytomegalovirus in vivo. At 5.6 mg/kg, 14/15 animals survived compared to 10/15 treated with 5.6 mg/kg of ganciclovir or 1/15 treated with placebo.     

Synthesis and antiviral activity of certain 4-substituted and 2,4-disubstituted 7-[(2-hydroxyethoxy)methyl]pyrrolo[2,3-d]pyrimidines

Treatment of the sodium salt of 4-chloro-2-(methylthio)pyrrolo[2,3-d]pyrimidine (2) with (2-acetoxyethoxy)methyl bromide (3) has provided 4-chloro-2-(methylthio)-7[(2-acetoxyethoxy)methyl]pyrrolo[2,3- d]pyrimidine (4). Ammonolysis of 4 at room temperature gave 4-chloro-2-(methylthio)-7-[(2-hydroxyethoxy)methyl]pyrrolo[2,3- d]pyrimidine (5). However, ammonolysis of 5 at 130 degrees C furnished 4-amino-2-(methylthio)-7-[(2-hydroxyethoxy)methyl]-pyrrolo[2,3- d]pyrimidine (6), which on desulfurization with Raney Ni yielded 4-amino-7-[(2-hydroxyethoxy)-methyl]pyrrolo[2,3-d]pyrimidine (7) (acyclic analogue of tubercidin). The oxidation of 6 with m-chloroperbenzoic acid provided the sulfone derivative 8. A nucleophilic displacement of the 2-methylsulfonyl group from 8 with methoxide anion provided 4-amino-2-methoxy-7-[(2-hydroxyethoxy)methyl]pyrrolo[2,3-d]pyrimidine (9). Demethylation of 9 with iodotrimethylsilane gave 4-amino-2-hydroxy-7-[(2-hydroxyethoxy)methyl]pyrrolo[2,3-d]pyrimidine (10). Treatment of 2,4-dichloropyrrolo[2,3-d]pyrimidine (11) with 3 gave the protected acyclic compound 12, which on deacetylation and ammonolysis under controlled reaction conditions gave 2,4-dichloro-7-[(2-hydroxyethoxy)-methyl]pyrrolo[2,3-d]pyrimidine (13) and 4-amino-2-chloro-7-[(2-hydroxyethoxy)methyl]pyrrolo[2,3- d]pyrimidine (14), respectively. The condensation of 2-acetamido-4-chloropyrrolo[2,3-d]pyrimidine (15) with 3 gave the protected acyclic compound 16, which on concomitant deacetylation and ammonolysis with methanolic ammonia at an elevated temperature yielded 2,4-diamino-7-[(2-hydroxyethoxy)methyl]pyrrolo[2,3-d]pyrimidine (17) in moderate yield. In tests involving human cytomegalovirus (HCMV) and herpes simplex virus type 1 (HSV-1), only slight activity and cytotoxicity were observed. The most active compounds (12 and 13) were slightly more active against HCMV than acyclovir, but both compounds were inactive against HSV-1. The activity against HCMV, however, was not well separated from cytotoxicity leading to the conclusion that these compounds did not merit further study.     

抗血吸虫病药物的研究 取代(4-氨基-1-萘偶氮)苯和取代[4-(二乙氨基乙基氨基)-1-萘偶氮]苯类的合成

应用Elslager等法合成了35个取代(4-氨基-1-萘偶氮)苯和取代[4-(二乙氨基乙基氨基)-1-萘偶氮]苯类,同时又合成了5-(4-氨基-1-萘偶氮)尿嘧啶和5-[4-(二乙氨基乙基氨基)-1-萘偶氮]尿嘧啶。经动物筛选证明,有13个化合物对日本血吸虫病有预防和治疗作用,其中以2-氯-4-硝基[4-(二乙氨基乙基氨基)-1-萘偶氮]苯(化合物26)和5-[4-(二乙氨基乙基氨基)-1-萘偶氮]尿嘧啶(I_b)的治疗作用最显著,灭虫率达70%左右。     

Quantitative studies on the urinary metabolic fate of 2-chloro-4-trifluoromethylaniline in the rat using 19F-NMR spectroscopy and directly coupled HPLC-NMR-MS

1. The metabolism and urinary excretion of 2-chloro-4-trifluoromethylaniline has been studied in the rat using 19F-NMR spectroscopy and directly coupled HPLC-NMR-MS methods. The compound was dosed to three male Sprague-Dawley rats (50 mg kg(-1) i.p.) and urine collected over 0-8, 8-24 and 24-48 h post-dosing. 2. A total urinary recovery of 56.3+/-2.2% of the dose was achieved up to 48 h after dosing. The major metabolite in the urine was identified as 2-amino-3-chloro-5-trifluoromethylphenylsulphate accounting for a total of 33.5+/-2.2% of the dose. 3. Further metabolites detected and characterized included 2-chloro-4-trifluoromethylphenylhydroxylamine glucuronide (13.2+/-0.5% of the dose), 2-amino-3-chloro-5-trifluoromethylphenylglucuronide (3.8+/-0.4% of the dose) and 2-chloro-4-trifluoromethylaniline-N-glucuronide (3.6+/-0.1% of the dose). Several minor metabolites were also found and identified, including 2-chloro-4-trifluoromethylphenylsulphamate, which together accounted for 2.1+/-0.4% of the dose. 4. Directly coupled HPLC-NMR-MS and 19F-NMR spectroscopy is shown to provide an efficient approach for the unequivocal and rapid determination of the quantitative urinary metabolic fate and excretion balance of a fluorinated xenobiotic without the necessity for specific radiolabelling.     

盐酸替扎尼定的合成改进

目的：改进盐酸替扎尼的合成路线.方法：以4-氯-2-硝基苯胺为起始原料,经还原反应和环合反应得5-氯-2,1,3-苯并噻二唑,再经硝化反应、还原反应得5-氯-4氨基-2,1,3-苯并噻二唑,与N-乙酰基-2-咪唑烷酮发生缩合反应后,再经醇解反应、成盐反应等步骤制得盐酸替扎尼定.结果：目标化合物的结构经红外光谱、核磁共振氢谱、核磁共振碳谱、质谱及元素分析确证.总收率52.4%.结论：本改进合成方法反应条件温和,操作简便.     

3,6-双羧甲基-4-氨基-6H-噻吩并[2,3-B]吡咯-2-羧酸的合成研究

目的设计并合成3,6-双羧甲基-4-氨基-6H-噻吩并[2,3-B]吡咯-2-羧酸。方法以柠檬酸为起始原料,经氧化酯化、Gewald反应、氮取代、环合、水解、脱羧反应制备得到目标化合物。结果合成了目标化合物,并利用质谱和核磁数据确证了结构;HPLC归一化法测得质量分数为96.98%。目标化合物的总收率为2.7%。结论 3,6-双羧甲基-4-氨基-6H-噻吩并[2,3-B]吡咯-2-羧酸的合成为雷奈酸锶中杂质的研究提供了方便。     

马来酸氟吡汀的合成工艺改进研究

目的对马来酸氟吡汀的合成工艺进行改进研究。方法以对氟苄胺和2-氨基-3-硝基-6-氯吡啶为起始原料,通过取代反应合成中间体2-氨基-3-硝基-6-对氟苄胺基吡啶,然后再通过一锅法合成马来酸氟吡汀。结果合成了目标化合物马来酸氟吡汀,并利用1H-NMR、MS、IR等确证了结构。本合成工艺的总收率为46.7%,质量分数为99.95%。结论该合成工艺改进后操作性好,条件温和,更适于药品的工业化生产。     

Synthesis and antimalarial effects of 4-[(7-chloro-4-quinolinyl)amino]-2-[(diethylamino)methyl] -6-alkylphenols and their N omega-oxides

A series of 4-[(7-chloro-4-quinolinyl)amino]-2-[(diethylamino)methyl]-6-alkylphenols and their N omega-oxides were synthesized by the condensation of 4,7-dichloroquinoline and 4,7-dichloroquinoline N omega-oxide with appropriately substituted 4-amino-2-[(diethylamino)methyl]-6-alkylphenol dihydrochlorides. The latter precursors were prepared in a six-step synthesis starting from available 2-alkylphenols. Several of the title compounds display potent antimalarial activity in mice.     

2,N-二甲基-N-(3,3-二苯基丙基)-1-氨基-2-丙醇的合成

目的研究2,N-二甲基-N-(3,3-二苯基丙基)-1-氨基-2-丙醇(1)的合成方法.方法以肉桂酸、氯化亚砜、甲胺等为原料,经烃化、氯化、酰化和还原反应得到N-甲基-3,3-二苯基丙胺(5);以3-氯异丁烯为原料,经加成、水解、环合反应得到环氧异丁烷(7),化合物5与7经烃化反应得到目标产物.结果与结论设计的合成路线以肉桂酸计,5步反应总收率为62.7%,合成路线简便易行,适于大规模制备.所合成的目标产物经ESI-MS和1H-NMR确证.