说明:双击或选中下面任意单词,将显示该词的音标、读音、翻译等;选中中文或多个词,将显示翻译。
您的位置:首页 -> 词典 -> 吡喃
1)  pyran [英]['pairæn]  [美]['paɪ,ræn]
吡喃
1.
New Method for the Synthesis of 4-(Dicyanomethylene)-2-methyl-6-[p-(dimethylamino)-styryl]-4H-pyran as Red Emitter;
有机电致红光材料4-(二腈亚甲叉)-2-甲基-6-(4-二甲胺基-苯乙烯)-4H-吡喃的合成新方法
2.
Synthesis of 2-Amino-3-cyano-4-aryl-5-methyloxycarbonyl-4H-pyrans on Thermosensitive Copolymer;
热敏共聚物负载的2-氨基-3-氰基-4-取代苯基-5-甲氧羰基-4H-吡喃化合物的合成
3.
Synthesis and Fluorescence Effects of the Derivatives of 4 - Dicyanomethylene -2,6- dimethyl - 4H - pyran;
4-二氰亚甲基-2,6-二甲基-4H-吡喃衍生物的合成及其荧光效应
2)  2 amino 3 cyano 4H pyran
吡喃
1.
Cyano 2 methoxylpyridine and 2 amino 3 cyano 4H pyran derivatives were synthesized by one step reaction of 2,5 bisarylidenecyclopentanone with malononitrile in sodium hydroxide/methanol or piperidine/ethanol under microwave irradiation with good yield
2,5 -双亚苄基环戊酮与丙二腈在氢氧化钠 -甲醇或哌啶 -乙醇中 ,经微波辐射一步合成了 2 -甲氧基 - 3-氰基 - 4 -芳基吡啶和 2 -氨基 - 3-氰基 - 4 -芳基吡喃衍生物 ,反应在 3~ 9min内完成 ,产率 5 6 %~ 78
2.
Cyano 2 methoxylpyridine and 2 amino 3 cyano 4H pyran derivatives were synthesized in single step action 2,6 bisarylidenecyclohexanone on malononitrile in sodium hydroxide/methanol or piperidine/ethanol under microwave irradiation in good yields.
一些 2 氨基 4H吡喃具有光化学活性[2 ] 。
3)  pyrane
吡喃
1.
The compounds of 2,4-diphenyl-5-oxo-tetrahydrothiopyrano [4, 3-d]v -pyrane are synthesized by the condensation reaction of tetraphydrothiopyran-3, 5-biketone and chalcone.
利用四氢噻喃-3,5-二酮与查尔酮的缩合反应合成出2,4-二苯基-5-氧代四氢噻喃并[4,3-d]v-吡喃,并探讨了其反应机理,提出了反应历程。
4)  benzopyran
苯并吡喃
1.
Synthesis and Vasorelaxant Activity of Trans-3-hydroxy-4-aminobenzopyran Acetylated Derivatives as K~+ Channel Openers;
反式-3-羟基-4-胺基苯并吡喃乙酰化物的合成及其血管舒张活性
2.
Synthesis of cis- and trans-2,4,7-Triaryl-5-oxo-4H-5,6,7,8-tetrahydrobenzopyrans;
顺(反)-2,4,7-三芳基5-氧代-4 H-5,6,7,8-四氢苯并吡喃衍生物的合成
3.
Synthesis and Crystal Structure of Ethyl 2-amino-7,7-dimethyl-4-(4′-fluorophenyl)-5-oxo-5,6,7,8-tetrahydro-4H-benzopyran-2-carboxylate in Water;
水相中2-氨基-7,7-二甲基-4-对氟苯基-5-氧代-5,6,7,8-四氢-4H-苯并吡喃-2-甲酸乙酯的合成和晶体结构
5)  chromene
苯并吡喃
1.
The convenient synthesis of a natural chromene;
一个苯并吡喃天然产物的简便合成
2.
Non-catalytic Synthesis of 2-Amimo-3-cyano- 7,7-dimethyl-4-aryl-5-oxo-5,6,7,8- tetra-4H-chromenes;
无催化剂条件下2-氨基-3-氰基-4-芳基-7,7-二甲基-5-氧代-5,6,7,8-四氢-4H-苯并吡喃的合成
6)  tetrahydropyran
四氢吡喃
1.
6%, while m-aminophenol was used as material, tetrahydropyran as hydroxyl shielding effect agent, ethyl bromide as ethyl reactant and dimethylsulfate as methyl reactant.
采用间氨苯酚为原料,以四氢吡喃(THP)作羟基保护剂,以溴乙烷作烷基化试剂,硫酸二甲酯作甲基化试剂,在原有最优化合成工艺条件下,经4步反应合成N-乙基间甲氧基苯胺,产率达到57。
2.
4-Chloro-6-phenyl-2-(2-oxopropyl)tetrahydropyran was obtained unexpectedly by the Prins reaction of 4-methyl-1,8-nonadiene-4,6-diol and benzaldehyde in the presence of indium trichloride in methylene chloride at room temperature.
以4-甲基-1,8-壬二烯-4,6-二醇为Prins反应的起始原料,在三氯化铟存在下与苯甲醛反应,得到了2-(2-氧代丙基)-6-苯基-4-氯四氢吡喃
3.
9%,while m-aminophenol is used as reactant,tetrahydropyran as hydroxyl shielding effect agent,acetic anhydride as acyl protection reactant and amidogen mono-substituted alternative reactant,ethyl bromide as ethyl reactant,dimethylsulfate as methyl reactant.
采用间氨苯酚为原料,以四氢吡喃(THP)作羟基保护剂,以醋酸酐作酰基保护剂和氨基单取代的专一选择剂,以溴乙烷作烷基化试剂,硫酸二甲酯作甲基化试剂,在原有最优化合成工艺条件下,经六步反应合成N-乙基间甲氧基苯胺,产率达到65。
补充资料:吡喃
吡喃
pyran
    含有一个氧杂原子的六元杂环化合物。分子式C5H6O。有两种同分异构体,分别称为a-吡喃( 1,2-吡喃 )和γ- 吡喃( 1,4-吡喃 )。a- 和γ-吡喃未分别分离出来过,吡喃的盐是一类很重要的化合物。吡喃环中的氧原子具有极强的碱性,成盐后即被稳定下来。许多重要的天然物如色素、糖、抗生素、生物碱,均含有吡喃或吡喃盐的环系,如五碳糖或六碳糖形式的六元环的半缩醛结构,就称为吡喃糖。
!!!B0984_1
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条