4H-吡喃,4H-pyran英语短句,例句大全

4H-吡喃,4H-pyran
1)4H-pyran4H-吡喃
1.Liquid-phase synthesis of methyl 6-amino-5-cyano-4-aryl-2-methyl-4H-pyran-3-carboxylates was achieved using ionic liquid boundβ-keto esters and arylmethylidenemalononitriles.报道了以离子液体1-(2-羟丙基)-3-甲基咪唑六氟磷酸盐为支撑试剂,β-酮酯和芳亚甲基丙二腈为原料,液相合成了11种6-氨基-5-氰基-4-芳基-2-甲基-4H-吡喃-3-羧酸甲酯化合物的新方法,产率83%～90%,纯度96%～99%。

英文短句/例句

1.Microwave-assisted Catalytic Synthesis of 4-Oxo-4H-pyran-2,6-dicarboxylic Acid微波辐射下合成4-氧代-4H-吡喃-2,6-二羧酸
2.The Synthesis of Derivations of 5-oxo-4H-5,6,7,8-tetrahydrobenzopyran with Microwave Assisted;5-氧代-4H-5，6，7，8-四氢苯并吡喃衍生物的微波全合成
3.Such a helerocycle is found in pyrylium salts.吡喃盐就是这类的杂环。
4.Asymmetric Total Synthesis of Benzopyrans and Dibenzopyrans Natural Products;苯并吡喃及二苯并吡喃类天然产物的手性全合成
5.Such is the case in pyrrole, thiophene, and furan.吡咯，噻酚和呋喃的情况就是这样。
6.Pyran is not aromatic, but the phrylium ion is.吡喃不是芳香的，但眬英嗡离子是。
7.The Preparation of Pyrrole from Furan and Ammonia in the Presence of Water Vapor;水蒸气存在下呋喃与氨反应制备吡咯
8.Syntheis of 2,5-Diphenyl Furan Dhiophene and Pyrrole Derivatives2,5-二苯基呋喃、噻吩、吡咯衍生物的合成
9.New Synthetic Method for 4-Methoxy-7H-Furo[3,2-g] benzopyran-7-one4-甲氧基-7H-呋喃[3,2-g][1]苯并吡喃-7-酮制备的新方法
10.Synthesis and characterization of glycosyl esters of cyclopropanecarboxylic acid(呋喃、吡喃)糖基环丙烷甲酸酯类化合物的合成和结构确证
11.In guaran, about one-half of the D-mannopyranosyl main-chain units contain a D-galactopyranosyl side chain.在瓜拉那中约一半D-吡喃甘露糖主链的单元含一个D-吡喃半乳糖侧链。
12.Synthesis and Activities of 2,3a-Dihydro-chromeno-[4,3-c]pyrazol-3-one Derivatives2,3a-二氢-苯并吡喃[4,3-c]吡唑-3-酮类衍生物的合成及其活性
13.Quantum Chemical Study of the Thermolysis of Chroman苯并二氢吡喃热分解反应的量子化学研究
14.Design and Synthesis of 3H-Naphtho[2, 1-b]Pyrans Compounds & Studies on Their Photochromic Characteristics;3H-萘并吡喃的设计合成及变色特性研究
15.Aerobic Oxidation of Substituted Cyclopentadienes to Pyrylium Cations in Solution;氧气液相氧化取代环戊二烯合成吡喃盐的研究
16.Synthesis and Properities of Substituted 3H-naphtho[2,1-b]Pyrans;烷基取代的3H-萘并[2，1-b]吡喃的合成及性能研究
17.Synthesis and Research of Their Properties of Photochromic Compounds Spiropyrans;光致变色化合物螺吡喃的合成及性能研究
18.Study on the Novel Photochromic Spiropyran Dyes with Functional Groups and Their Applications;含功能基团的螺吡喃化合物的合成与性能研究

相关短句/例句

2-Amino-4H-pyran2-氨基-4H-吡喃
3)4H-naphtho[1,2-b]chromene4H-萘并[1,2-b]吡喃
4)Tetrahydro-4H-pyran-4-one四氢-4H-吡喃-4-酮
5)4H-benzo[b]pyrans4H-苯并[b]吡喃
1.Owing to the special structure and high reactivity of 2-(benzo[d]thiazole-2-yl)- acetonitrile andβ-(2-chloroaroyl)-heterocyclic ketene aminals, we herein developed an excellent strategy for for the synthesis of 4H-benzo[b]pyrans, tetrahydroimidazo -[1,2-a]pyridines and 1,8-naphthyridines derivatives.本论文基于2-氰甲基苯并噻唑及利用β-邻氯芳基杂环烯酮缩胺的独特结构和突出的反应性能,构筑和发展4H-苯并[b]吡喃,四氢咪唑并吡啶和1,8-二氮杂萘类杂环体系的合成方法。
6)H-benzo[h]chromene4H-苯并[h]苯并吡喃
1.Synthesis and Crystal Structure of 2-Amino-3-cyano-4-(4-fluorophenyl)-4H-benzo[h]chromene;2-氨基-3-氰基-4-(4-氟苯基)-4H-苯并[h]苯并吡喃的合成和晶体结构