共查询到18条相似文献,搜索用时 234 毫秒
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(9S)-12-亚甲基红霉素衍生物的合成及体外抗菌活性 总被引:1,自引:2,他引:1
目的合成新的具有抗菌活性的红霉素衍生物。方法以红霉素为原料,合成中间体2′-O,4″-O-二苯甲酰基-(9S)-9-O,11-O-异丙基-12-亚甲基红霉素与6,7-去氢-2′-O,4″-O-二苯甲酰基-(9S)-9-O,11-O-异丙基-12-亚甲基红霉素,进而合成相应(9S)-9-O,11-O-亚乙基-12-亚甲基衍生物。产物结构经13C NMR,FAB-MS确证。对所得化合物进行体外抗菌活性测定。结果制备11个红霉素衍生物,其中5个未见文献报道。化合物9和12进行了体外抗菌活性测定。结论化合物9和12表现出较弱的抗菌活性。 相似文献
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目的 培养(S)-2-(Boc-氨基)-3-[(S)-2-氧代-3-吡咯烷基]丙酸甲酯单晶,并进行晶型表征和立体结构确证。方法 用醋酸乙酯-甲基叔丁基醚(1∶1)体系培养单晶,并采用热重法、差示扫描量热法、粉末X射线衍射和单晶X射线衍射分析。结果 制备得到无色块状晶体;样品熔点约为114 ℃;该晶胞属于正交晶系,空间群为P212121,分子式为C13H22N2O5,相对分子质量为286.33,晶体密度为1.152 mg/mm3,绝对构型为S,S构型。结论 确定了(S)-2-(Boc-氨基)-3-[(S)-2-氧代-3-吡咯烷基]丙酸甲酯的立体构型,培养的晶体为非水合物和溶剂化物。 相似文献
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本文报道了2,4-二氨基-6-N1,N2-二取代肼基-喹唑啉类衍生物的合成及其抗疟活性的研究。这类化合物的合成是以2,4-二氨基6-取代苄基氨基-喹唑啉为原料经亚硝化、还原成为2,4-二氨基6-(N1-取代苄基)—肼基喹唑啉,再与相应的醛缩合而成。此类化合物经伯氏鼠疟原虫抑制性治疗初筛表明有少数具有一定的效果。有11个化合物经约氏鼠疟原虫—斯氏按蚊系统病因性初筛有效。其中化合物Ⅱ1,7,8,11,15和Ⅲ1口服2.5mg/kg,连续3天,可使受试小鼠全部得到保护。 相似文献
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目的为寻找新型的5-HT2A受体选择性配体,设计合成了一系列二芳烷基哌啶类化合物的含硫衍生物。方法以2,3-二甲氧基硫酚为原料,经烃化、氧化和水解等反应合成3个N-取代哌啶-4-苯硫醚和砜类化合物,所有目标化合物结构均经元素分析、1HNMR谱、质谱和红外光谱确证,并测定其对5-HT2A,5-HT2C,5-HT6和5-HT7受体及其他一些中枢神经递质受体的体外亲和力。结果3个目标化合物(2a-2c)及5个中间体均为新化合物。体外受体竞争结合试验结果表明2a-2c均有较高的5-HT2A受体选择性。结论此类化合物对5-HT2A受体的选择性较高,值得进一步研究。 相似文献
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去甲乌药碱具有强心作用,为了寻找更有效的化合物,设计合成了一系列去甲乌药碱类似物,其中包括B环开环类似物;双-四氢异喹啉类及其开环类似物;氨基侧链取代C环等。在所合成的化合物中,D2呈明显活性,优于去甲乌药碱。 相似文献
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Foroumadi A Firoozpour L Emami S Mansouri S Ebrahimabadi AH Asadipour A Amini M Saeid-Adeli N Shafiee A 《Archives of pharmacal research》2007,30(2):138-145
A series ofN-[5-(chlorobenzylthio)-1,3,4-thiadiazol-2-yl] piperazinyl quinolone derivatives (4a-1) have been synthesized by reaction of piperazinyl quinolones with 5-chloro-2-(chloroben-zylthio)-1,3,4-thiadiazoles. Their
structures were confirmed by elemental analysis, IR and NMR spectra. The antibacterial activities of4a-1 against a variety of Gram-positive and Gram-negative bacteria were determined. Several compounds showed a good antibacterial
activity against Gram-positive bacteria among which, compound 4e with a 2-chlorobenzylthio moiety in ciprofloxacin derivative,
exhibited high activities againstStaphylococcus aureus andStaphylococcus epidermidis (MIC=0.06 μg/mL). The structure-activity relationship (SAR) study revealed that the position of chlorine atom on benzyl moiety
would dramatically affect the antibacterial activities of the synthesized compounds. 相似文献
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In further study on the synthesis of chelating agents with catechol residue,twoconvenient procedures-ethyl chloroformate method and dicyclohexylcarbodiimide(DCC)method-weredeveloped.The latter was used successfully to synthesize chelating agents with several catechol units.These compounds are more effective than compounds with only one catechol unit to detoxicate micewhich were under acute UO2(NO3)2 intoxication(LD95~100). 相似文献
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The condensation of mono o- or p-substituted anilines (1) with tetrachloro-1,4-benzoquinone (2) has been achieved by using K2CO3 under conventional heating, solid solvent-free grinding, solid-phase microwave irradiation (MWI) conditions to obtain substituted
dichloro-p-benzoquinone derivatives (3). All the nontraditional methods described herein provide several advantages over prior methods such as higher yield, convenient
work-up procedure, and enviro-economic synthesis. It is observed that solid-supported reaction under MWI is the most appropriate
for the synthesis of the title compounds. All the synthesized compounds were tested for their in vitro antibacterial and antifungal
activity. Some compounds showed promising antimicrobial properties. The best activity was observed with compounds 3b and 3f.
Presented at the International Symposium on Current Trends in Drug Discovery
Research (CTDDR) (P-12) 17–21 February 2007, Central Drug Research Institute, Luknow, India.
(Abstract Published in Medicinal Chemistry Research
2007, 15(1/6):117–118). 相似文献
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酞丁安对映体合成及其抗单纯疱疹病毒活性评价 总被引:1,自引:0,他引:1
酞丁安(3-酞酰亚胺-2-氧-正丁醛双缩氨硫脲,TDA)是药物研究所创制的抗病毒新药。为了研究其对映异构体(R),(S)-TDA对病毒活性及毒性是否有差异,并与消旋酞丁安(RS)-TDA的抗病毒活性及毒性进行比较,本文分别用已知构型的(R)-与(S)-丙氨酸为原料,通过缩合等6步反应,得到光学活性的(R)-,(S)-TDA,并与外消旋酞丁安比较其抗病毒活性及毒性。三者的抗单纯疱疹病毒活性与对细胞的毒性差别不大,说明消旋酞丁安临床使用是安全有效的。 相似文献