吡喃

在没有酸催化的条件下，反应生成3乙酰基2羟基6甲基-吡喃4酮（8），并通过单晶X射线衍射分析确定了产物的结构；

Under the acid free condition , 3 acetyl 2 hydroxy 6 methyl pyran 4 one ( 8 ) was obtained and its structure was confirmed by X ray diffraction analysis .

在离子液体中一步法合成吡唑[5,4-b]-γ-吡喃衍生物

One Pot Synthesis of Pyrazolo [ 5,4-b ] - γ - pyran Derivatives in Ionic Liquid

合成了一系列吡喃鎓盐激光染料（P1～P8）。

A series of pyrylium salt laser dyes ( P_1 ~ P_6 ) were synthesized .

研究报道双苯吡喃酮类化合物可以作为有效的DNA嵌入剂和拓扑异构酶抑制剂，起到抑制肿瘤增值的作用。

It is reported that xanthone could act efficient DNA intercalators and topoisomerase inhibitors , displaying interesting anticancer activity .

方法以4羟基6甲基2吡喃酮、N，N二甲基甲酰胺二甲氧基缩醛为起始原料，经两步反应制得目标化合物。

Methods The target compound was synthesized by two steps with 4-hydroxy-6-methyl-2-pyrone and N , N-dimethylformamide dimethyl acetal as the starting materials .

KF-Al2O3催化下吡喃并[2,3-d]嘧啶衍生物的一步合成

One-pot Synthesis of Pyrano [ 2,3-d ] pyrimidine Derivatives Catalyzed by KF / Al_2O_3

3-碘-苯并吡喃-4-酮与2-硫代嘧啶类的Michael加成反应

Michael addition of 3 iodo 4 oxo 4H 1 benzopyran 4 one with 2 thio pyrimidines

HIV蛋白酶抑制剂吡喃酮类化合物的QSAR研究

QSAR Study on Pyranones for Inhibitor of HIV Protease

二维NMR确定吡喃酮衍生物C9H（12）O4的结构

2D NMR Study on the Structure of a Pyranone Derivative C_9H_ ( 12 ) O_4

非还原端吡喃糖苷对Maillard反应中蛋白质聚合作用的抑制效应

Suppressive effect of nonreducing end pyranoside groups on protein polymerization in Maillard reaction

关键酶是吡喃糖氧化酶，它释放出H2O2供含锰的过氧化物酶利用。

A critical enzyme is pyranose oxidase , which releases H2O2 for use by the manganese dependent peroxidase enzyme .

经UV、IR和1H-NMR分析可知，三种多糖为β-糖苷键连接的吡喃环多糖。

UV , IR and 1H-NMR analysis , the three fractions of polysaccharide are β - glycosidic linkage of the pyran ring polysaccharide .

0.2%α-吡喃酮WP对植物病原真菌的防治效果

Efficacy of an α - pyrone 0.2 % wettable powder against plant fungal pathogens

环状糊精（cyclodextrin，简称CD）是由D-吡喃葡萄糖基以α-1，4葡萄糖苷键连接成的环状低聚糖。

Cyclodextrin ( CD ) is a kind of ring oligose . It is connected by α - 1,4 glucoside linkage with D - glucopyranose .

甲基吡喃的合成布氏锥虫葡糖基磷脂酰肌醇（GPI）的研究进展

Research prospects on glycosylphosphatidylinositol ( gpi ) of Trypanosoma brucei

采用N，N-二乙基间氨基苯酚为原料，合成出了一种香豆素类的红色光转换材料：3-二乙氨基-7-（2,4-二羟基酚）-6H，7H-[1]-苯并吡喃-[4,3-b]-[1]-苯并吡喃-6,10-二酮。

Beginning with N , N-diethyl-3-amino phenol , we synthesized a coumarin red photo-conversion materials : 3-diethylamino-7 - ( 2,4-dihydroxy-phenyl ) - 6H , 7H - [ 1 ] - benzopyran & [ 1 ] - benzopyran-6,10-dione .

目的：观察以吡喃阿霉素（THP）为主的改良CHOP方案治疗非霍奇金淋巴瘤的疗效、不良反应，并与以阿霉素（ADM）为主的经典CHOP方案进行比较。

Objective : To compare the efficacy and safety of Tetrahydropyranyl Adriamycin ( THP ) vs. Adriamycin in the treatment of non-Hodgkin ′ s lymphoma .

0.2%α-吡喃酮WP的有效成分为5,6-二氢-6-戊基-2H-吡喃-2-酮（5,6-dihydro-6-pentyl-2H-pyran-2-one）。

The active ingredient of α - pyrone 0.2 % wettable powder is 5,6-dihydro-6-pentyl-2H-pyran-2-one .

目的：评价吡喃糖氧化酶（PROD）对不同的糖底物、甘油和乙二醇的催化作用。

Objective : To evaluate the catalyzing effects of pyranose oxidase ( PROD ) on different sugar substrates , glycerol and ethylene glycol .

方法：利用MTT观察7.5～60μg/ml的表阿霉素或柔红霉素或吡喃阿霉素处理K562/A02细胞后细胞增殖的变化。

Methods : MTT method was used to observe the alteration of the proliferation of K562 / A02 cell line treated with 7.5 ~ 60 μ g / ml Pharmorubicin or Daunorubicin or Pirarubicin .

介绍了以多聚甲醛、间戊二烯为原料在乙酸乙酯中BF3-乙醚溶液催化作用下，进行Diels-Alder反应，合成了2-甲基-5,6-二氢-2H吡喃的方法。

Synthesis of 2-methyl-5,6-dihydro-2H-pyrane from paraformaldehyde and 2,4-pentadiene in ethyl acetate in the presence of BF_3-ethyl ether as catalyst by Diels-Alder reaction was presented .

以芳醛、丙二腈（或氰乙酸酯）、β-萘酚为原料在六氢吡啶存在下以乙醇为溶剂一锅合成了取代萘并吡喃，产物的结构通过单晶X射线衍射分析确定。

The substituted naphthopyrans have been synthesized by the reaction of aromatic aldehydes with malononitrile ( or ethyl cyanoacetate ) and β - naphthol in ethanol at reflux in the presence of piperidine . The structure of 4h was determined by single-crystal X-ray diffraction study .

目的：观察一氧化氮（NO）供体型苯骈吡喃类化合物Ⅱ-7对清醒自发性高血压大鼠（SHR）血压的影响及体外NO释放活性。

AIM : To study the effect of NO donating-benzopyran compound & ⅱ - 7 on the awake spontaneously hypertensive rats ( SHR ) and the nitric oxide ( NO ) release in vitro .

目的探讨膀胱癌术后大剂量吡喃阿霉素（THP）膀胱内灌注时保留时间对肿瘤复发和对人体安全性的差异。

Objective To investigate the relationship between intra-bladder infusion retaining time and tumor recurrence or human safety with large dose of pirarubicin hj'drochloride for injection ( THP ) in postoperative bladder cancer .

目的比较ITP（异环磷酰胺+吡喃阿霉素+顺铂）与NP（去甲长春花碱+顺铂）方案治疗晚期非小细胞肺癌的临床有效率和毒副作用。

Objective To evaluate the efficacy and toxicity of ITP ( ifosfamide + perarubicin + cisplatin ) and NP ( vinorelbine + cisplatin ) regimens in the treatment of advanced non small cell lung cancer ( NSCLC ) .

苯并吡喃羧酸类化合物对TMV的诱导抗性：以心叶烟为材料，采用全叶法，对5种羧酸类化合物进行药效筛选试验，得到最优药剂。

The induction resistance of benzopyran acids on TMV : The optimal agent was screened by the resistant test of 5 carboxylic acid compounds on Nicotiana glutinosa as the materials using the whole leaf method .

结论：NO供体型苯骈吡喃类化合物Ⅱ-7单次及重复灌胃7d均能明显降低SHR的血压，降压作用具有一定的剂量相关性，其在体外能缓慢稳定地释放NO。

CONCLUSION : Single or 7-day repeated oral administration of NO donating-benzopyran compound (ⅱ - 7 ) could significantly decrease the blood pressure of SHR release NO slowly while remaining at a rather stable level in vitro .

单用吡喃阿霉素组较对照组有显著差异（P0.05），即DU-145细胞S期明显增多。

Compared with control group , there was significant difference ( P 0.05 ) in signal pirarubicin group . That is , there was significant increase of S phrase cell in DU-145 cells . ( 3 ) .

红外光谱显示该多糖具有一般多糖的特征吸收峰，其中六碳糖为吡喃型。PSP为硫酸酯化多糖，硫酸基团含量约为4%。

The result by IR analysis indicates that PSP has its characteristic absorption peak , and its hexose is of pyranoid form while PSP is sulfated polysaccharide , and its content of – SO3 - is about 4 % .

紫外可见吸收光谱和红外光谱的分析结果表明CLPS-A2为具有乙酰氨基结构的β型吡喃多糖。

UV-VIS spectrum and FTIR analysis showed that CLPS-A2 was β - heterosaccharides with pyran and acetyl amino group .