3-甲基-5-苄基-2-芳基-2-吗啉醇盐酸盐的合成及生物活性

目的:合成并筛选新的抗抑郁活性化合物。方法:以间氯苯丙酮、苯丙酮、6-甲氧基-2-丙酰萘为起始化合物,经溴化反应合成2-溴-3-氯苯丙酮,2-溴苯丙酮,6-甲氧基-2-(2-溴丙酰基)萘,然后分别与外消旋化合物3-苯基-2-氨基-1-丙醇反应得到目标化合物。参照Porsolt法小鼠强迫游泳药理实验模型对所合成的化合物进行了初步抗实验性抑郁活性研究。结果:合成了目标化合物,目标化合物结构经IR,~1HNMR,MS确证。口服剂量为50 mg·kg~(-1)化合物4a的小鼠组强迫游泳静止时间显著低于空白对照组(P＜0．01)。结论:本合成方法反应时间短,溶剂无毒性,收率较理想。化合物4a显示良好的抗实验性抑郁活性,值得进一步研究。     

3,5-二甲基-2-(3'''',5''''-二氟苯基)-2-吗啉醇盐酸盐的合成

目的：合成抗抑郁药安非他酮类似物3，5-二甲基-2-（3’，5’-二氟苯基）-2-吗啉醇盐酸盐。方法：以3，5-二氟苯丙酮为原料，经溴代、胺化、环合、酸化合成了目标产物。结果：合成目标产物的总收率为77．3％，中间体和产物经红外光谱和核磁共振谱确证。结论：以溴化铜为α-溴代反应溴化剂进行澳代反应，选择性高，产物易于分离。在非质子极性溶剂中进行胺化反应，反应时间短，溶剂无毒性，具有较高的应用价值。     

盐酸安非他酮的合成研究

目的 合成抗抑郁药盐酸安非他酮。方法 采用氯化铜高选择性氯化3-氯苯丙酮得2-氯-(3-氯苯基)-1-丙酮，再经叔丁胺胺化、盐酸-异丙醇酸化成盐制得盐酸安非他酮。运用IR、^1H-NMR、^13C-NMR和MS进行结构鉴定。结果 合成的盐酸安非他酮总收率为76％(以3-氯苯丙酮计)。结论 本法氯代反应选择性高，操作简便，总收率较高。．     

(2R,3S)-2-[(R)-1-[3,5-二(三氟甲基)苯基]乙氧基]-3-(4-氟苯基)吗啉盐酸盐的合成

对甲氧基苯甲醛(3)和2-氨基乙醇进行还原胺化反应得2-(4-甲氧基苄胺基)乙醇(4),4和乙醛酸经成环反应得2-羟基-4-对甲氧基苄基吗啉-3-酮(5),5和三氟乙酐反应得6后与(R)-1-[3,5-二(三氟甲基)苯基]乙醇(7)缩合,再经结晶诱导不对称转化、格氏反应、氢化脱保护及成盐反应制得阿瑞吡坦关键中间体(2R,3S)-2-[(R)-1-[3,5-二(三氟甲基)苯基]乙氧基]-3-(4-氟苯基)吗啉盐酸盐,总收率约18%(以3计)。     

溴化铜对芳基烷基酮的选择性溴化反应研究

研究溴化铜对苯丙酮、间－氯苯丙酮、6－甲氧基－2－丙酰基萘、6－甲氧基－2－乙酰基萘、对－甲氧基苯乙酮和苯乙酮等芳基烷基酮的α－溴化反应，在乙醇或乙酸乙酯－氯仿混合溶剂中，溴化铜对芳基丙酮（苯丙酮、间－氯苯丙酮和6－甲氧基－2－丙酰基萘）溴化，高收率、高选择性地得到α－溴化产物。芳基乙酮（6－甲氧基－2－乙酰基萘、对－甲氧基苯乙酮和苯乙酮）的溴化铜溴化，在乙醇中反应，选择性得到α－溴化产物。     

(S)-5-乙酰胺甲基-3-[(3-氯-4-取代胺甲基)苯基]-2-噁唑烷酮的合成及抗菌活性

3-氯-4-甲基苯胺经氯甲酸苄酯酰化、与（R）-正丁酸缩水甘油酯环合、甲磺酰化、叠氮化、叠氮还原成胺、氨基乙酰化、苄位溴化得（固-5-乙酰胺甲基-3-[（3-氯-4-溴甲基）苯基]-2-噁唑烷酮（Ⅷ），后者与胺类化合物进行取代反应生成（D-5-乙酰胺甲基-3-[（3-氯-4-取代胺甲基）苯基]-2-噁唑烷酮。35个新化合物的结构经^1HNMR、元素分析或MS确证，并测定了它们的体外抗菌活性，发现化合物113对金葡菌和表葡菌的活性与吗啉噁酮相当。11和113对肠球菌的活性优于诺氟沙星。     

3,6-二甲氧基-2,5-二氢吡嗪-2-羧酸乙酯的合成

用苄氧羰基氨基乙酸在N-甲基吗啉的催化下与氯甲酸异丁酯反应后,无需分离直接与氨基丙二酸二乙酯盐酸盐反应得到(2-苄氧羰基氨基乙酰胺基)丙二酸二乙酯,经Pd/C催化氢解、环合后在二氯甲烷中与Me3OBF4反应制得α-取代丝氨酸的合成中间体3,6-二甲氧基-2,5-二氢吡嗪-2-羧酸乙酯,总收率35.1%.     

(2S,3R)-1-二甲氨基-3-(3-甲氧基苯基)-2-甲基戊-3-醇的合成工艺研究

目的 对(2S,3R)- 1-二甲氨基-3-(3-甲氧基苯基)-2-甲基戊-3-醇合成工艺进行研究.方法 以3-戊酮为起始原料,经Mannich反应、手性拆分、Grignard反应等步骤合成(2S,3R)-1-二甲氨基-3-(3-甲氧基苯基)-2-甲基戊-3-醇,并对化学拆分进行工艺优化.结果 合成(2S,3R)-1...     

利托君的合成新路线

２－溴－１－对甲基苯丙酮与对甲氧基苯安反应后,再经脱二甲基和硼氢化钾还原,合成了利托君。中间体１－（４－甲氧基苯基）－２－「２－（４－甲氧基苯基）乙胺基」丙－１－酮盐酸盐（５）为新化合物,结构经ＭＳ、＾１ＨＮＭＲ证实。以２－溴－１－对甲氧基苯丙酮计算,总收率为２８．６％。     

盐酸他喷他多的合成

间甲氧基苯丙酮与二甲胺盐酸盐发生Mannich反应生成消旋3-二甲胺基-1-(3-甲氧基苯基)-2-甲基-1-丙酮(13),经结晶诱导的非对映异构体转化得到S-型化合物14后,经格氏反应、酰化及催化氢解得到(2R,3R)-2-甲基3-(3-甲氧基苯基)-N,N-二甲基戊胺,最后经脱保护基、与盐酸成盐得到中枢镇痛药盐酸他喷他多,总收率约52%.     

Michael-Additionen mit Acylaminosäureestern, 2. Mitt. Darstellung von 3-Aryl-2,4-bis(äthoxycarbonyl)-2-methyl-pyrrolidonen-(5)

Michael Addition with Acylamino Acid Esters II. – Preparation of 3-Aryl-2,4-bis(ethoxycarbonyl)-2-methyl-5-pyrrolidones Michael addition of DL-acetylalanineethyl ester with diethyl arylidenemalonate yields a mixture of the 3-aryl-2,4-bis(ethoxycarbonyl)-2-methyl-5-pyrrolidones 3 and 4 . In contrast to analogous reactions this synthesis is not stereoselective.     

Synthesis,Properties, and Antimicrobial Activity of 3-Hydrazones of 1-Aryl-5-methyl-1,5-ethoxycarbonylpyrrolidine-2,3-diones

Reactions of 5-methyl-1-aryl-ethoxycarbonylpyrrolidine-2,3-diones (I, II, III, IV) with hydrazine hydrate, phenylhydrazine, isoniazid, benzoylhydrazine, and thiosemicarbazide were used to synthesize a series of 3-hydrazones of 1-aryl-5-methyl-5-ethoxycarbonylpyrrolidine-2,3-diones (V – VIII), 3-phenylhydrazones of 1-aryl-5-methyl-5-ethoxycarbonylpyrrolidine-2,3-diones (IX – XII), 3-isonicotinoylhydrazones of 1-aryl-5-methyl-5-ethoxycarbonylpyrrolidine-2,3-diones (XIII – XV), 3-benzoylhydrazone of 5-methyl-1-phenyl-5-ethoxycarbonylpyrrolidine-2,3-dione (XVI), and 3-thiosemicarbazone of 5-methyl-1-phenyl-5-ethoxycarbonylpyrrolidine-2,3-dione (XVII). All target products were obtained with a yield of 51 – 90%. The reactions of 3-hydrazone of 1-phenyl-5-methyl-5-ethoxycarbonylpyrrolidine-2,3-dione (V) with 5-aryl-2,3-dihydro-2,3-furandiones yielded 3-N-aroylpyruvoylhydrazones of 5-methyl-1-phenyl-5-ethoxycarbonylpyrrolidine-2,3-dione (XVIII, XIX), and the heating of 3-hydrazone of 5-methyl-1-(4-chlorophenyl)-5-ethoxycarbonylpyrrolidine-2,3-dione (VI) with 4-methoxybenzaldehyde yielded 5-methyl-3-N-4-methoxybenzylidene-hydrazino-1-(4-chlorophenyl)-5-ethoxycarbonyl-3-pyrrolidin-2-one (XX). The synthesized compounds are characterized by physicochemical constants and the parameters of IR and ¹H NMR spectra. Some compounds were tested for antimicrobial activity. __________ Translated from Khimiko-Farmatsevticheskii Zhurnal, Vol. 39, No. 8, pp. 19 – 22, August, 2005.     

新型离子液体催化合成喹唑啉酮衍生物的研究

目的制备新型离子液体催化剂,用于改进喹唑啉酮衍生物的合成工艺。方法以低成本开发新型离子液体,用于催化邻氨基苯甲酰胺与系列芳香醛缩合制备2-芳基-2,3-二氢喹唑啉-4(1H)-酮化合物。结果用一锅法合成了苯并噻唑六氟磷酸盐离子液体;使用该离子液体催化制备2-芳基-2,3-二氢喹唑啉-4(1H)-酮化合物的收率为77%～91%,产物易于分离且离子液体可循环使用5次以上。结论所开发的离子液体制备成本低、过程环保;以该离子液体为催化剂建立的2-芳基-2,3-二氢喹唑啉-4(1H)-酮化合物的合成方法简便易行。     

Zur Darstellung von 5-Aryl-2-cyclohexenonen

Syntheses of 5-Aryl-2-cyclohexenones The 5-aryl-3-isopropyl-6,6-dimethyl-2-cyclohexenones 4a-f were synthesized by base-catalysed reactions of aromatic aldehydes with 3-methyl-2-butanone in ethanol/water at 70°C. Benzaldehyde and butanone react in the same way. Two of the four possible 5-aryl-2-cyclohexenones are formed in low yields and were isolated as their oximes.     

3-芳基-2-甲基-1-吡咯并[1,2-a]吡嗪酮类衍生物的合成和抗炎镇痛作用

目的研究3-芳基-2-甲基-1-吡咯并[1,2-a]吡嗪酮(2)类化合物抗炎镇痛作用的构效关系.方法通过吡咯-2-甲酸甲酯与α-溴代芳基乙酮的烃基化反应,制得1-(2-氧代-2-芳基)乙基吡咯-2-甲酸甲酯(4),4与甲胺反应经过环合直接生成目的化合物2;用小鼠测试了所合成化合物的抗炎镇痛活性.结果与结论合成了15个目标化合物;小鼠试验表明,一些所合成的化合物具有明显的抗炎和/或镇痛作用,其中化合物2o的作用活性与阳性对照药布洛芬相似.     

Novel synthesis of 3,4-diarylisoxazole analogues of valdecoxib: reversal cyclooxygenase-2 selectivity by sulfonamide group removal

3,4-Diarylisoxazole analogues of valdecoxib [4-(5-methyl-3-phenylisoxazol-4-yl)-benzensulfonamide], a selective cyclooxygenase-2 (COX-2) inhibitor, were synthesized by 1,3-dipolar cycloaddition of arylnitrile oxides to the enolate ion of phenylacetone regioselectively prepared in situ with lithium diisopropylamide at 0 degrees C. The corresponding 3-aryl-5-methyl-4-phenylisoxazoles were easily generated by a dehydration/aromatization reaction under basic conditions of 3-aryl-5-hydroxy-5-methyl-4-phenyl-2-isoxazolines and further transformed into their benzenesulfonamide derivatives. The biochemical COX-1/COX-2 selectivity was evaluated in vitro by using the human whole blood assays of COX isozyme activity. Three compounds not bearing the sulfonamide group present in valdecoxib were selective COX-1 inhibitors.     

Non-steroidal antiinflammatory agents. Synthesis of novel 2-pyrazolyl-4(3H)-quinazolinones

Four novel series of pyrazolyl-4(3H)-quinazolinones have been prepared through the reaction of 3-aryl-2-hydrazino-4(3H)-quinazolinones with antipyrylazo-derivatives of ethyl acetoacetate, acetylacetone or diethyl malonate. These series of compounds are 3-aryl-2-[1-ethoxycarbonyl-1-(1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H - pyrazol-4-yl)hydrazono-2-propylidene]hydrazino-4(3H)-quinazo linones; 3-aryl-2-[4-(1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl) hydrazono-3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl]-4(3H)-quinaz olinones; 3-aryl-2-[4-(1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)azo -3,5- dimethyl-1H-pyrazol-1-yl]-4(3H)-quinazolinones and 3-aryl-2-[4-(1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl) hydrazono-3,5-dioxo-pyrazolidin-2-yl]-4(3H)-quinazolinones. The antiinflammatory activity of some representatives of the prepared compounds was studied.     

2-(5-甲基-2-苯基-4-(口恶)唑)-乙醇的合成

以丙酰乙酸乙酯为起始原料,先溴化得到4-溴丙酰乙酸乙酯,再在甲苯中与苯甲酰胺回流环合得到2-(5-甲基-2-苯基-4-(口恶)唑)-乙酸乙酯,最后经氢化铝锂还原,得到目标杂环中间体2-(5-甲基-2-苯基-4-(口恶)唑)-乙醇.该合成方法反应步骤少,原料便宜,目标物的总收率为67.3%.     

Nitration and halogenation of various 2-aryl-4-chloro-methyl-oxazoles. 23. Heterocyclic compounds

Nitration and Halogenation of Some 2-Aryl-4-chloro-methyl-oxazoles The nitration and bromination of the 2-aryl-4-chloro-methyl-oxazole is studied. The bromination in the position 5 of the oxazole ring is especially easy. The nitro group in the benzene ring is always introduced in ortho-position to the existing substituent. In the case of 2-phenyl-4-chloro-methyl-oxazole a mixture of 2 isomers is obtained: 2-(p-nitro)-and 2-(m-nitro)-phenyl-4-chloro-methyl-oxazole.     

Synthesis and antimicrobial activities of some new nitroimidazole derivatives

In this study, some new nitroimidazole derivatives were obtained from 2-(2-methyl-5-nitro-1H-imidazol-1-yl)ethylamine dihydrochloride (4) and 1-(2-bromoethyl)-2-methyl-5-nitroimidazole (5), which were prepared using metronidazole. Compound 4 was reacted with arylisothiocyanates (6) to obtain 1-[2-(2-methyl-5-nitroimidazol-1-yl)ethyl]-3-arylthioureas (7) and the latter with alpha-bromoacetophenones (8) to give 3-[2-(2-methyl-5-nitroimidazol-1-yl)ethyl]-2-arylimino-4-aryl-4-thiazolines (9). Also 1-[2-(2-methyl-5-nitroimidazol-1-yl)ethyl]-2-phenyl-4-arylideneimidazolin-5-ones (11) were prepared by reaction of 4 with 2-phenyl-4-arylidene-5-oxazolones (10). The reaction of the other starting material 5 with 5-arylidenethiazolidin-2,4-dione (12) gave 3-[2-(2-methyl-5-nitroimidazol-1-yl)ethyl]-5-arylidenethiazolidin-2,4-dione (13) derivatives. Structural elucidation of the compounds was performed by IR, 1H-NMR and MASS spectroscopic data and elemental analysis results. Antimicrobial activities of the compounds were examined and moderate activity was obtained.