HPLC测定甲磺酸罗哌卡因旋光异构体含量

目的:测定经拆分合成的左旋S-(-)-甲磺酸罗哌卡因中右旋R-(+)-甲磺酸罗哌卡因含量。方法:采用高效液相色谱法测定。色谱条件:Chiral—AGP柱(150 mm×4.0 mm,5 μm),流动相为异丙醇-磷酸盐缓冲液[取1 mol·L-1的磷酸二氢钠7.5 mL,0.5 mol·L-1的磷酸氢二钠溶液28.5 mL,加水稀释到1000 mL,调节pH值至7.2](7:93),柱温:25℃,流速为1.0 mL·min～1。紫外检测器,检测波长220 nm,进样量20μL。结果:甲磺酸罗哌卡因消旋体中左旋体、右旋体的保留时间分别为12.1及17.4 min,左、右旋体的分离度良好。精密度试验的RSD为3.3％。结论:采用本方法可简单、准确地测定甲磺酸罗哌卡因中右旋甲磺酸罗哌卡因的含量。     

化合物ent-kaur-16-en-19-oic acid对胃癌BGC-823细胞生长抑制作用的实验研究

目的：研究化合物K_1(ent-kaur-16-en-19-oic acid)对BGC-823胃癌细胞的生长抑制作用。方法：采用MTT法观察不同浓度化合物K_1对BGC-823胃癌细胞的生长抑制作用。结果：化合物K_1对BGC-823胃癌细胞增殖有明显的抑制作用。     

5-氧-烯丙基-2,3,4-三-氧-苄基-D-核糖醇的合成工艺改进

目的合成5-氧-烯丙基-2,3,4-三-氧-苄基-D-核糖醇。方法以D-核糖为原料,经甲苷化、苄基化、水解、肟保护、烯丙基化、脱肟、还原7步反应得到5-氧-烯丙基-2,3,4-三-氧-苄基-D-核糖醇。结果与讨论总收率55%,目标产物结构经核磁共振氢谱确认。该合成路线步骤少,绿色环保,适合工业化生产。     

头孢曲松钠中残留的三嗪环的定性定量研究

目的:对头孢曲松钠中的三嗪环进行定性定量测定,可以控制其残留总量,减少过敏反应的发生,促进工艺改进。方法:本文采用质谱(MS)、红外吸收光谱(IR)与核磁共振谱(NMR),对获得的三嗪环参照品进行结构确认,然后用高效液相色谱法(HPLC)对其在头孢曲松钠中的残留进行定量测定。结果:表明所获得的三嗪环参照品纯度很高,能够对头孢曲松钠作定性定量分析。结论:头孢曲松钠中三嗪环的残留在安全限度之中。     

液质联用鉴定重组人血管内皮抑制素

目的：用液质联用技术鉴定重组人血管内皮抑制素（rhEndostatin）。方法：利用ESI—Q—TOF—MS法测定rhEndostatin的精确相对分子质量，通过HPLC—ESI—Q—TOF—MS／MS法测定其胰蛋白酶酶切后肽段的部分氨基酸序列并结合数据库检索进行结构鉴定。结果：重组人血管内皮抑制素的实测相对分子质量为21114．5，与理论相对分子质量21113．8相比非常接近。HPLC—ESI—Q—TOF—MS／MS测定m／z802．0的肽段的部分氨基酸序列为Ala—Pro—Ser—Ala-Thr—Gly—Gin—Ala—Ser—Ser—Leu—Leu。将其m／z和氨基酸序列在MASCOT数据库检索，结果表明重组人血管内皮抑制素的结构正确。结论：液质联用是鉴定蛋白质的灵敏、快速、准确的新方法。     

(R)-(-)-1-(2-萘基)-2-N-甲基氨基乙醇的合成

目的研究拟β-肾上腺素(R)-(-)-1-(2-萘基)-2-N-甲基氨基乙醇(1)的合成方法.方法以β-萘乙烯(2)为原料,通过烯烃的Sharpless不对称双羟化、环化、选择性开环、催化氢化、甲酰化、还原等6步反应制备目标产物.结果与结论设计的合成路线以β-萘乙烯计,6步反应总收率为39.3%,ee值高达97%～99%,合成路线易行.目标产物的结构经质谱、红外光谱、1H-NMR和13C-NMR确证.     

Effects of (+/-)- (+)- and (-)-metoprolol, (+/-)- (+)- and (-)-pindolol, (+/-)-mepindolol and (+/-)-bopindolol on the rat left atria and portal vein.

1. The effects of (+/-)- (+)- and (-)-metoprolol, (+/-)- (+)- and (-)-pindolol, (+/-)-mepindolol and (+/-)-bopindolol on the beta 1-adrenoceptor mediated responses of the rat left atria and the beta 2-adrenoceptor mediated responses of the rat portal vein to isoprenaline have been determined. 2. Racemic and (-)-metoprolol were selective beta 1-adrenoceptor antagonists. (+)-Metoprolol was devoid of beta-adrenoceptor antagonistic activity. 3. Racemic and (-)-pindolol were potent and (+)-pindolol was a modest beta-adrenoceptor antagonist. 4. (+/-)-Mepindolol and (+/-)-bopindolol were apparently competitive antagonists of the isoprenaline beta 1-adrenoceptor mediated responses of the rat left atria but non-competitive antagonists of the isoprenaline beta 2-adrenoceptor mediated responses of the rat portal vein. 5. It is suggested that (+/-)-mepindolol and (+/-)-bopindolol are slowly dissociating beta-adrenoceptor antagonists and the non-competitive antagonism can only be detected on tissues with modest receptor reserves for maximum responses to isoprenaline.     

Synthesis of (R)-(-)- and (S)-(+)-4-fluorodeprenyl and (R)-(-)- and (S)-(+)-[N-11C-methyl]-4-fluorodeprenyl and positron emission tomography studies in baboon brain

(R)-(-)- and (S)-(+)-alpha-methyl-beta-4-(fluorophenyl)-N-methyl-N- propynylethylamine [R)-(-)- and (S)-(+)-4-fluorodeprenyl) were synthesized via the reaction of 4-fluorobenzaldehyde with nitroethane followed by reduction with lithium aluminum hydride to produce racemic 4-fluoroamphetamine, which was resolved by recrystallization with L- or D-N-acetylleucine to yield (R)-(-)-4-fluoroamphetamine or (S)-(+)-4-fluoroamphetamine in greater than 96% enantiomeric excesses and in yields of 42 and 39%, respectively. Alkylation with propargyl bromide gave (R)-(-)- or (S)-(+)-4-fluoronordeprenyl which was reductively methylated (Borch conditions) to produce (R)-(-)- or (S)-(+)-4-fluorodeprenyl. Alkylation of (R)-(-)- or (S)-(+)-4-fluoronordeprenyl with carbon-11 labeled methyl iodide gave (R)-(-)- or (S)-(+)-[N-11C-methyl]-4-fluorodeprenyl in a radiochemical yield of 30-40%. Comparative PET studies of the two labeled enantiomers in baboons showed a significantly lower retention of radioactivity in the striatum for the (S)-(+) enantiomer relative to the (R)-(-) enantiomer.     

反相HPLC法测定大鼠血浆中17-烯丙胺基-17-脱甲基格尔德霉素及其代谢产物17-氨基-17-脱甲基格尔德霉素

目的:建立大鼠血浆中17-烯丙胺基-17-脱甲基格尔德雷素(17AAG)和17-氨基-17-脱甲基格尔德雷素(17AG)的反相高效液相色谱分析方法,用于17AAG 及其主要代谢产物17AG 的临床前药代动力学研究。方法:以α-萘酚为内标,用乙酸乙酯将17AAG 和17AG 从大鼠血浆中萃取分离吹干后,流动相复溶,HPLC 分析。色谱柱为日产迪玛 Inertsil-ODS 3色谱柱(250 mm×4.6 mm,5 μm),流动相为乙腈-25 mmol·L~(-1)磷酸盐缓冲液(含三乙胺10 mmol·L~(-1))(55:45,pH=3.0),流速1 mL·min~(-1),紫外检测波长313 nm。结果:17AAG、17AG 及内标α-萘酚与内源性干扰分离良好,17AAG 和17AG 在10.0-16000.0μg·L~(-1)浓度范围内呈良好线性关系,相关系数分别为0.9992和0.9987,平均萃取回收率均大于80%,内标回收率为85%。2种组分的最低定量限为10μg·L~(-1)。17AAG 日内 RSD 为2.9%～11.3%,日间 RSD 为6.5%～18.5%;17AG 日内RSD 为3.0%～3.8%,日间 RSD 为5.9%～16.4%。大鼠舌下静脉推注17AAG 15 mg·kg~(-1)后,其主要药动学参数为:CL=21.14 mL·min~(-1)·kg~(-1),AUC=206.5μg·min·mL~(-1),t_(1/2α)=24.82 min,t_(1/2β)=116.20 min,V\-c=1046.3 mL·kg~(-1)。结论:本法可满足17AAG 临床前药代动力学研究的要求。     

含氧叔丁基三唑醇类化合物的合成及其体外抗真菌活性

目的设计合成含氧取代的叔丁基三唑醇类化合物并研究其体外抗真菌活性。方法以一氯频那酮为起始原料经多步反应合成目标化合物,化合物结构经1H-NMR谱、IR谱确证;选择8种真菌为实验菌株,按国际标准抗真菌敏感性实验方法测定体外抑菌活性。结果与结论合成了12个新化合物。所有目标化合物对8种真菌均具有一定的抑制作用。可以将现有的三唑醇类抗真菌药物结构中的2,4-二氟苯基替换成其他疏水性基团来设计抗真菌化合物。     

柱前衍生化反相高效液相色谱法测定N-甘氨酰-L-谷氨酰胺一水合物含量

目的:用反相高效液相色谱法测定N-甘氨酰-L-谷氨酰胺一水合物含量。方法:以2,4-二硝基氟苯作柱前衍生化试剂,在碱性条件下制得2,4-二硝基苯基-N-甘氨酰-L-谷氨酰胺,上ODS色谱柱,置日本岛津SCL-10AVP高效液相色谱仪上进行分析。流动相为0.05mol·L~(-1)醋酸钠水溶液(用冰醋酸调pH6.4)-乙腈(80:20),检测波长为360nm,进样量20μL,流速1mL·min~(-1)。结果:N-甘氨酰-L-谷氨酰胺-水合物在16～80μg·mL~(-1)范围内线性良好,r=0.994 3,回归方程Y=1.2436×10~(-4)X,重现性RSD=0.31％(n=5)。结论:本法可用于测定N-甘氨酰-L-谷氨酸胺-水合物的含量。     

Synthesis and antimicrobial activity of some 1-(2,4-dinitrophenyl)-3-(3-nitrophenyl)-5-(4-substituted phenyl)-4-bromo-2-pyrazolines and 1-(2,4-dinitrophenyl)-3-(3-nitrophenyl)-5-(4-substituted phenyl)-2-pyrazolin-4-ones

A series of 1-(2,4-dinitrophenyl)-3-(3-nitrophenyl)-5-(4-substituted phenyl)-2-pyrazolin-4-ones (4a-e) have been synthesized by the oxidation of 1-(2,4-dinitrophenyl)-3-(3-nitrophenyl)-5-(4-substituted phenyl)-4-bromo-2-pyrazolines (3a-e) with dimethylsulfoxide. The structure has been established on the basis of spectral data (IR,1H NMR). The synthesized compounds have been screened in vitro for their possible antimicrobial activity.     

Synthesis and antirhinovirus activity of 6-(dimethylamino)-2-(trifluoromethyl)-9-(substituted benzyl)-9H-purines

A series of 6-(dimethylamino)-2-(trifluoromethyl)-9-(substituted benzyl)purines was synthesized and tested for antirhinovirus activity. Most of the compounds were synthesized by alkylation of 6-chloro-2-(trifluoromethyl)-9H-purine with the appropriate benzyl halide followed by displacement of the chloro group with dimethylamine. Alternatively, 6-(dimethylamino)-2-(trifluoromethyl)purine was alkylated with the appropriate benzyl halide. Although several different aryl substituents provided compounds with IC50's = 0.03 microM against rhinovirus serotype 1B, no congener was significantly more active than the parent 2. Twenty-three compounds were tested against 18 other serotypes, but none exhibited a uniform profile of activity.     

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。     

Production of 1-(1-adamantyl)-2-[4-(2-chloropyrimidinyl)]-1,2,3,4-tetrahydroisoquinoline

A multistage synthesis of a new derivative of 1,2,3,4-tetrahydroisoquinoline is described. Synthesis of title compound is based on the Bischler-Napieralski reaction.