吡喃酮

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

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 .

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 .

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

采用β-萘酚为基本原料，经Reimer-Tiemann反应合成了2-羟基-1-萘甲醛，在催化剂存在下进一步与苯乙酸进行缩合反应合成香豆素类荧光增白剂3-苯基-5,6-苯并α-吡喃酮。

With β - naphthol as starting material , 2-hydroxy-1-naphthalene carbonal was first synthesized through Reimer-Tiemann reaction . Then in the presence of catalyst , fluorescent whitening agent 3-phenyl-5,6-benzo - α - pyrone was synthesized with the resultant product and phenylacetic acid through condensation .

仙人掌中一个新α-吡喃酮成分的分离与结构鉴定

The isolation and identification of a new α - pyrone from Opuntia dillenii

目的设计并合成苯并吡喃酮酯衍生物并探索其趋骨性。

OBJECTIVE To design and synthesize benzopyrone ester derivatives and to test their bone affinity .

3-羟基-1,4-吡喃酮分子内激发态质子转移位能面和机理的研究

The Study of Potential Energy Surface and Mechanism of Intramolecular Excited-State Proton Transfer of 3-Hydroxy-1 , 4-Pyrone

再次，通过改变与吡喃酮环相连的亚甲基碳原子的电子云杂化状态，设计了化合物类型2.11。

Moreover , parent compound 2.11 was designed by changing hybridization of carbon which attached with the pyranone D-ring at 7-position .

本文由链状醛酮的烯胺与己二酰氯反应合成两个新的4－吡喃酮衍生物。

The syntheses of two new derivatives of 4 - pyrone , by the reaction of adipyl choloride with enamines deriving from chain ketones and aldehydes , are described .

研究了在离子液体介质中，芳香醛和两分子6-甲基-4-羟基吡喃酮在乙酸酐存在下的缩合成环反应，并通过该反应合成了一系列双吡喃酮并吡喃类化合物。

The condensation-cyclization cascade reaction of aromatic aldehyde with two equiv of 4-hydroxy-6-methyl-pyrone in the presence of acetic anhydride was studied by using ionic liquid as both reaction medium and promoter .

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

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 .

溶剂和催化剂对3-酰化苯并吡喃-4-酮合成的影响

Effect of solvents and catalysts on 3 acylated 4H 1 benzopyran 4 ones

4-羟基-3-取代苯基-2H-苯并吡喃-2-酮衍生物的合成及杀菌活性

Synthesis and Fungicidal Activity of 4-Hydroxy-3 - ( substituted phenyl ) - 2H-benzopyran-2-one Derivatives

在不同的标准缓冲溶液中吡喃草酮光降解速度明显降低。

The tepraloxydim light degeneration speed reduces obviously in the different standard cushion solution .

结论部分设计的苯并吡喃4酮衍生物具有比四环素更好的趋骨性。

Conclusion Some of the benzopyran-4-one derivatives synthesized have better bone affinities compared with tetracycline .

结论3-苯甲酰基-2H-1-苯并吡喃-2-酮衍生物作为新型肿瘤抑制剂，其构效关系值得进一步研究。

Conclusion The structure-activity relationships of3-benzoyl-2H-1-benzopyran-2-one derivatives , as a novel type of tumor inhibitor , should be investigated furtherly .

方法以乙酰乙酸乙酯为起始物，设计合成了含2H-吡喃-2-酮结构的化合物10a~10l；

METHODS New territrem B analogues 10a ~ 10l with the common structure of 2H-pyran-2-one were designed and synthesized from ethyl acetoacetate .

异苯并二氢吡喃并[3,4-b]吡啶酮衍生物的合成及其抗炎活性

Synthesis and anti-inflammatory activity of 3,4-dihydro-isobenzopyrano [ 3,4-b ] pyridone

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 .