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Synthesis of (S)-2-(3-Arylacrylamido)-3-{4-[2-(5-methyl-2-phenyl-oxazol-4-yl)ethoxy]phenyl}propanoic Acids
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作者 Xin Bo ZHOU Cui Fang LIN Song LI 《Chinese Chemical Letters》 SCIE CAS CSCD 2005年第10期1301-1304,共4页
The synthesis of (S)-2-(3-arylacrylamido)-3-{4-[2-(5-methyl-2-phenyloxazol-4-yl)etho- xy]phenyl}propanoic acids is described. Their structures were confirmed by ^1H-NMR.
关键词 (S)-2-(3-Arylacrylamido)-3-{4-[2-(5-methyl-2-phenyloxazol-4-yl)ethoxy]phenylpropanoic acids synthesis.
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Crystal Structure and Biological Activities of (R)-N′-[2-(4-Methoxy-6-chloro)-pyrimidinyl]-N-[3-methyl-2-(4-chlorophenyl)butyryl]-urea
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作者 LI Jing-Zhi XUE Si-Jia LIU Guo-Hua 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2006年第8期903-908,共6页
The title compound (R)-N′-[2-(4-methoxy-6-chloro)-pyrimidyl]-N-[3-methyl-2-(4- chlorophenyl)butyryl]-urea has been synthesized, and its crystal structure and biological behaviors were studied. Crystallographic ... The title compound (R)-N′-[2-(4-methoxy-6-chloro)-pyrimidyl]-N-[3-methyl-2-(4- chlorophenyl)butyryl]-urea has been synthesized, and its crystal structure and biological behaviors were studied. Crystallographic data: C17H18C12N4O3, Mr = 397.25, monoclinic, space group P21/c, a = 12.331(2), b = 14.025(3), c = 23.085(5) A, β = 99.607(4)°, Z = 8, V = 3936.2(13) A3, Dc = 1.341 g/cm^3, F(000) = 1648, R = 0.0718, wR = 0.1585 and/t(MoKα) = 0.353 mm^-1. The preliminary biological tests showed that the title compound has definite insecticidal and fungicidal activities. 展开更多
关键词 crystal structure biological activity (R)-3-methyl-2-(4-chlorophenyl)butyric acid 2-amino-6-chloro-4-methoxy-pyrimidine
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Synthesis and Characterization of Novel Copolymers Based on 3(S)-Methyl-Morpholine-2,5-Dione
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作者 冯亚凯 陈程斌 +2 位作者 张利 田鸿 袁文婕 《Transactions of Tianjin University》 EI CAS 2012年第5期315-319,共5页
A series of novel copolymers were successfully synthesized by ring-opening polymerization (ROP) of 3 (S)-methyl-morpholine-2,5-dione (MMD) and 5-methyl-5-benzyloxycarbonyl-1,3-dioxan-2-one (MBC) using stan- no... A series of novel copolymers were successfully synthesized by ring-opening polymerization (ROP) of 3 (S)-methyl-morpholine-2,5-dione (MMD) and 5-methyl-5-benzyloxycarbonyl-1,3-dioxan-2-one (MBC) using stan- nous octoate as catalyst. The copolymers were characterized by means of ~H-NMR and FT-IR spectroscopy. Gel permeation chromatography (GPC) test shows that the average-number relative molecular mass and average-weight rela- tive molecular mass slightly increase with the increase of MBC content in feed. The results of differential scanning calorimetry (DSC) demonstrate that the glass transition temperature of copolymers increases with the increase of MBC content in copolymers. The copolymers of MMD and MBC are amorphous copolymers, as indicated by DSC results, while the homopolymer of MMD is semicrystalline. 展开更多
关键词 amino acid 3 (S)-methyl-morpholine-2 5-dione 5-methyl-5-benzyloxycarbonyl-l 3-dioxan-2-one ring- opening polymerization copolymer biomaterial
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Prenatal and Postnatal Exposures to 1-Methyl-4-phenyl-1,2,3,6-tetra Hydropyridine (MPTP) Impaired Mouse Midbrain Dopamine System and May Produce a Predisposing and Inducing Model for Parkinson’s Disease
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作者 Gladson Muthian Jennifer King +3 位作者 Lemuel Dent Marquitta Smith Veronica Mackey Clivel Charlton 《Journal of Behavioral and Brain Science》 2012年第4期485-494,共10页
Dopamine cell bodies in the substantia nigra of the midbrain and with their terminals projecting to the neostriatum form the nigrostriatum and these dopamine neurons degenerate in Parkinson’s disease (PD). Based on m... Dopamine cell bodies in the substantia nigra of the midbrain and with their terminals projecting to the neostriatum form the nigrostriatum and these dopamine neurons degenerate in Parkinson’s disease (PD). Based on metabolic and func- tional specialization of the cell bodies versus the axon terminals, the level and disposition of dopamine, its metabolites and enzymes are different in both regions and are likely to be affected differently in PD. We examined changes in the midbrain dopamine system following 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP), to test the hypothesis that a predisposing/sensitization stage and a inducing/precipitating stage underlie PD. Pregnant mice were treated with a low dose of MPTP during gestation days 8 - 12 to model the predisposing/sensitization stage, by interrupting the fetal mid- brain dopamine system during its neurogenesis. For the inducing/precipitating stage, the 12-weeks offspring were ad- ministered MPTP. The prenatal-MPTP offspring appear normal, but midbrain dopamine, 3,4-di-hydroxy-phenyl-acetic- acid, 3-methoxytyramine, tyrosine-hydroxylase and L-aromatic-amino-acid-decarboxylase, were reduced by 49.6%, 48%, 54%, 20.9% and 25%. Postnatal-MPTP of 10, 20, 30 mg/kg administered to the prenatal-PBS vs prenatal-MPTP offspring reduced midbrain dopamine by 43.6%, 47.2%, 70.3% vs 85.4%, 89.1%, 95.2%;tyrosine-hydroxylase by 30%, 63%, 81% vs 30.7%, 70.4%, 91.4%;L-aromatic-amino-acid-decarboxylase by 0%, 2%, 40% vs 32%, 40%, 58%. The prenatal-MPTP may render the DA system sensitive by causing sub-threshold reduction of DA, its metabolites and en- zymes, enabling postnatal-MPTP to reduce dopamine above the 70% - 80% PD-inducing threshold. Thus, the study may produce a prenatal predisposing/sensitization and postnatal inducing/precipitation model of PD. It also indicates that some cases of PD may have a fetal basis, in which sub-threshold nigrostriatal impairments occur early in life and PD-symptoms are induced during aging by further insults to the dopaminergic system that would not cause PD symptoms in normal indi-viduals. 展开更多
关键词 Parkinson’s Disease MIDBRAIN 1-methyl-4-Phenyl-1 2 3 6-TETRAHYDROPYRIDINE (MPTP) Dopamine Tyrosine Hydroxylase L-aromatic Amino acid Decarboxylase Sensitization Precipitation
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The transient receptor potential melastatin 2:a new therapeutical target for Parkinson's disease? 被引量:3
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作者 Ana Flávia F.Ferreira Luiz Roberto G.Britto 《Neural Regeneration Research》 SCIE CAS CSCD 2023年第8期1652-1656,共5页
The transient receptor potential melastatin 2 is a calcium-permeable cation channel member of the TRP family. Also known as an oxidative stress-activated channel, the transient receptor potential melastatin 2 gating m... The transient receptor potential melastatin 2 is a calcium-permeable cation channel member of the TRP family. Also known as an oxidative stress-activated channel, the transient receptor potential melastatin 2 gating mechanism is dependent on reactive oxygen species. In pathological conditions, transient receptor potential melastatin 2 is overactivated, leading to a Ca~(2+) influx that alters cell homeostasis and promotes cell death. The role of transient receptor potential melastatin 2 in neurodegenerative diseases, including Alzheimer's disease and ischemia, has already been described and reviewed. However, data on transient receptor potential melastatin 2 involvement in Parkinson's disease pathology has emerged only in recent years and the issue lacks review studies that focus specifically on this topic. The present review aims to elucidate the role of the transient receptor potential melastatin 2 channel in Parkinson's disease by reviewing, summarizing, and discussing the in vitro, in vivo, and human studies published until August 2022. Here we describe fourteen studies that evaluated the transient receptor potential melastatin 2 channel in Parkinson's disease. The Parkinson's disease model used, transient receptor potential melastatin 2 antagonist and genetic approaches, and the main outcomes reported were discussed. The studies described transient receptor potential melastatin 2 activation and enhanced expression in different Parkinson's disease models. They also evidenced protective and restorative effects when using transient receptor potential melastatin 2 antagonists, knockout, or silencing. This review provides a literature overview and suggests where there is a need for more research. As a perspective point, this review shows evidence that supports transient receptor potential melastatin 2 as a pharmacological target for Parkinson's disease in the future. 展开更多
关键词 1-methyl-4-phenyl-1 2 3 6-tetrahydropyridine(MPTP) 1-methyl-4-phenylpyridinium(MPP+) 6-HYDROXYDOPAMINE AG490 CLOTRIMAZOLE flufenamic acid N-(p-amylcinnamoyl)anthranilic acid Parkinson's disease poly-ADPR polymerase type 1(PARP1) ROTENONE PARAQUAT transient receptor potential melastatin 2(TRPM2)
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An environmentally friendly synthesis of 1,4-dihydropyrano[2,3-c]pyrazole derivatives catalyzed by tungstate sulfuric acid 被引量:2
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作者 Mahnaz Farahi Bahador Karami +1 位作者 Iman Sedighimehr Hamideh Mohamadi Tanuraghaj 《Chinese Chemical Letters》 SCIE CAS CSCD 2014年第12期1580-1582,共3页
An efficient three-component synthesis of 6-amino-4-aryl-5-cyano-3-metriyl-1-phenyl-1,4-dihydropyrano[2,3-c]pyrazoles via a reaction between 3-methyl-1-phenyl-2-pyrazolin-5-one,aromatic aldehydes and malononitrile usi... An efficient three-component synthesis of 6-amino-4-aryl-5-cyano-3-metriyl-1-phenyl-1,4-dihydropyrano[2,3-c]pyrazoles via a reaction between 3-methyl-1-phenyl-2-pyrazolin-5-one,aromatic aldehydes and malononitrile using tungstate sulfuric acid as a catalyst was described.Mild conditions,good to excellent yields,easily available catalyst and easy work-up are the key features of this method. 展开更多
关键词 6-Amino-4-aryl-5-cyano-3-methyl-1phenyl-1 4-dihydropyrano[2.3-c]pyrazoles 3-methyl-1-phenyl-2-pyrazolin-5-one Aromatic aldehyde Malononitrile Tungstate sulfuric acid
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UPLC-Q/TOF法同时定性定量分析滇芹药材中主要化学成分 被引量:8
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作者 秦伟瀚 冉继春 +4 位作者 叶良红 花雷 王云红 郭延垒 阳勇 《中草药》 CAS CSCD 北大核心 2018年第15期3576-3582,共7页
目的建立UPLC-Q/TOF法同时定性、定量分析滇芹中主要化学成分。方法采用超高效液相色谱串联飞行时间质谱法进行分析,色谱柱为Agilent Poroshell 120 Hilic,流动相为乙腈-0.1%甲酸水溶液,梯度洗脱,体积流量0.3 m L/min;定性、定量采用Q-... 目的建立UPLC-Q/TOF法同时定性、定量分析滇芹中主要化学成分。方法采用超高效液相色谱串联飞行时间质谱法进行分析,色谱柱为Agilent Poroshell 120 Hilic,流动相为乙腈-0.1%甲酸水溶液,梯度洗脱,体积流量0.3 m L/min;定性、定量采用Q-TOF正负离子全扫描+IDA(信息关联采集)模式。结果利用已建立的筛查数据库将满足质量误差小于5×10-6、同位素分布正确且含有二级碎片的离子作为分析目标化合物,结合软件Formula Finder、Mass Calculators等功能、在线数据库(Human Metabolome Database、Pub Chem、Chemical Book等)及二级碎片裂解规律,共鉴定出23个化合物,滇芹首次发现4个化合物。确定阿魏酸为定量分析指标性成分,其定量、定性离子分别为178和149;阿魏酸检测质量浓度线性范围为1.14~1 140 ng/m L(r=1.000),检测限、定量限分别为0.87、2.91 ng/m L,精密度、稳定性、重复性试验的RSD<2%,加样回收率为98.13%~101.25%(RSD=1.37%,n=5)。结论该方法灵敏度高、重现性好,分析快速、准确、可靠,可用于同时定性、定量检测滇芹药材中主要化学成分;云南滇芹中阿魏酸含量要高于西藏滇芹。 展开更多
关键词 滇芹 UPLC-Q/TOF 阿魏酸 6-(2-methoxyvinyl)-7-methyl-2H-1-benzopyran-2-one 1-O-β-D-glucopyranosyl-1 3-octanediol 2-pentylbutanedioic acid 4 4-dimethylcholesta-8(9) 14-dien-3β-ol
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